{"id":118749,"date":"2024-09-20T03:23:20","date_gmt":"2024-09-20T10:23:20","guid":{"rendered":"https:\/\/blogv2prod.wpenginepowered.com\/blog\/?p=118749"},"modified":"2025-01-02T18:01:51","modified_gmt":"2025-01-03T02:01:51","slug":"car-door-vapor-barrier-a-quick-guide","status":"publish","type":"post","link":"https:\/\/www.carparts.com\/blog\/car-door-vapor-barrier-a-quick-guide\/","title":{"rendered":"Car Door Vapor\/Moisture Moisture Barrier: a Quick Guide"},"content":{"rendered":"<!DOCTYPE html PUBLIC \"-\/\/W3C\/\/DTD HTML 4.0 Transitional\/\/EN\" \"http:\/\/www.w3.org\/TR\/REC-html40\/loose.dtd\">\n<html><body><span class=\"span-reading-time rt-reading-time\" style=\"display: block;\"><span class=\"rt-label rt-prefix\">Reading Time: <\/span> <span class=\"rt-time\"> 5<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span><style>.kadence-column118749_660284-d3 > .kt-inside-inner-col,.kadence-column118749_660284-d3 > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column118749_660284-d3 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column118749_660284-d3 > .kt-inside-inner-col{flex-direction:column;}.kadence-column118749_660284-d3 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column118749_660284-d3 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column118749_660284-d3{position:relative;}@media all and (max-width: 1024px){.kadence-column118749_660284-d3 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column118749_660284-d3 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column118749_660284-d3 inner-column-1 qk-look-widget\"><div class=\"kt-inside-inner-col\">\n<div class=\"wp-block-ultimate-post-row ultp-block-0a87de  qk-main-wrap\"><div class=\"ultp-row-wrapper\"><div class=\"ultp-row-content\">\n<div class=\"wp-block-ultimate-post-column ultp-block-65d1ae\"><div class=\"ultp-column-wrapper\"><style>.wp-block-kadence-advancedheading.kt-adv-heading118749_6421d9-fc, .wp-block-kadence-advancedheading.kt-adv-heading118749_6421d9-fc[data-kb-block=\"kb-adv-heading118749_6421d9-fc\"]{text-align:center;font-size:20px;font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading118749_6421d9-fc mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading118749_6421d9-fc[data-kb-block=\"kb-adv-heading118749_6421d9-fc\"] mark.kt-highlight{font-family:Inter;font-weight:500;font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}.wp-block-kadence-advancedheading.kt-adv-heading118749_6421d9-fc img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading118749_6421d9-fc[data-kb-block=\"kb-adv-heading118749_6421d9-fc\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<div class=\"kt-adv-heading118749_6421d9-fc summary-title wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading118749_6421d9-fc\"><span>Summary<\/span><\/div>\n\n\n\n<ul class=\"wp-block-list\">\n<li>A car door vapor\/moisture barrier is the protective plastic sheet you see when you remove a car door panel.<\/li>\n\n\n\n<li>The moisture barrier prevents water vapor inside the shell of the car door from causing mold on the hidden side of the car&rsquo;s door panel.<\/li>\n\n\n\n<li>You can replace a damaged moisture vapor barrier with a new part or a homemade barrier.<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n\n\n<p>Found in the doors of your car or truck, the moisture barriers behind the door panel prevent the inevitable water vapor inside the door from causing mold\/mildew on the back side of the door panel, which may cause odors and health problems. This won&rsquo;t usually happen, but this is why the barrier is there, to protect vulnerable parts of your vehicle from corrosion and damage. If you must replace the interior door panels, exert care when handling the moisture vapor barriers.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What is a Car Door Vapor\/ Moisture Barrier?<\/h2>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"996\" height=\"747\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/car-door-moisture-barrier.jpg\" alt=\"car door moisture barrier\" class=\"wp-image-122348\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/car-door-moisture-barrier.jpg 996w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/car-door-moisture-barrier-300x225.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/car-door-moisture-barrier-768x576.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/car-door-moisture-barrier-150x113.jpg 150w\" sizes=\"(max-width: 996px) 100vw, 996px\"><figcaption class=\"wp-element-caption\">&nbsp;A car door moisture barrier | Image Source: Richard McCuistian<\/figcaption><\/figure>\n\n\n\n<p>The moisture\/vapor barrier, also sometimes called a dust or water barrier, is a protective sheet attached by glue or sticky black putty to the interior of the car door frame. You won&rsquo;t see it unless you remove the <a href=\"https:\/\/www.carparts.com\/door-panel\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"door panel\">door panel<\/a>, and it needs to be carefully peeled back out of the way when you&rsquo;re performing repairs inside the car door (power window repairs, etc.).<\/p>\n\n\n\n<p>On older cars, it might be brown paper with a tar-based backing, but on newer vehicles it&rsquo;s usually made of plastic.<\/p>\n\n\n\n<p>Most door bottoms have weep holes that rapidly drain the fluid out of the door. The water barrier keeps moisture and condensation from reaching the door panel and interior.<\/p>\n\n\n\n<p>And while this part is important, there are DIY people and inexperienced mechanics who will totally remove it and not put it back when performing repairs inside the door.<\/p>\n\n\n\n<p>This isn&rsquo;t the kiss of death, and you may never experience an issue if the moisture barrier has been left out, but it&rsquo;s best to make sure it&rsquo;s in place. If you find that somebody else left it off, you can use a piece of plastic (even a garbage bag) and some tape to replace it.<\/p>\n\n\n<style>.kadence-column118749_ac4483-24 > .kt-inside-inner-col,.kadence-column118749_ac4483-24 > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column118749_ac4483-24 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column118749_ac4483-24 > .kt-inside-inner-col{flex-direction:column;}.kadence-column118749_ac4483-24 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column118749_ac4483-24 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column118749_ac4483-24{position:relative;}@media all and (max-width: 1024px){.kadence-column118749_ac4483-24 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column118749_ac4483-24 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column118749_ac4483-24 kb-section-dir-vertical kb-section-sm-dir-vertical inner-column-1 pro-tip-widget\"><div class=\"kt-inside-inner-col\"><style>.kb-row-layout-id118749_6bcb69-df > .kt-row-column-wrap{align-content:start;}:where(.kb-row-layout-id118749_6bcb69-df > .kt-row-column-wrap) > .wp-block-kadence-column{justify-content:start;}.kb-row-layout-id118749_6bcb69-df > .kt-row-column-wrap{column-gap:var(--global-kb-gap-none, 0rem );row-gap:var(--global-kb-gap-md, 2rem);padding-top:20px;padding-right:32px;padding-bottom:20px;padding-left:16px;grid-template-columns:minmax(0, calc(10% - ((var(--global-kb-gap-none, 0rem ) * 1 )\/2)))minmax(0, calc(90% - ((var(--global-kb-gap-none, 0rem ) * 1 )\/2)));}.kb-row-layout-id118749_6bcb69-df > .kt-row-layout-overlay{opacity:0.00;}.kb-row-layout-id118749_6bcb69-df .kt-row-layout-bottom-sep{height:100px;}.kb-row-layout-id118749_6bcb69-df .kt-row-layout-bottom-sep svg{width:100%;}.kb-row-layout-id118749_6bcb69-df .kt-row-layout-bottom-sep svg{fill:#ffffff!important;}.kb-row-layout-id118749_6bcb69-df .kt-row-layout-top-sep{height:100px;}.kb-row-layout-id118749_6bcb69-df .kt-row-layout-top-sep svg{width:100%;}.kb-row-layout-id118749_6bcb69-df .kt-row-layout-top-sep svg{fill:#ffffff!important;}@media all and (max-width: 1024px){.kb-row-layout-id118749_6bcb69-df > .kt-row-column-wrap{grid-template-columns:minmax(0, 1fr) minmax(0, 2fr);}}@media all and (max-width: 1024px){.kb-row-layout-id118749_6bcb69-df .kt-row-layout-bottom-sep{height:px;}}@media all and (max-width: 1024px){.kb-row-layout-id118749_6bcb69-df .kt-row-layout-bottom-sep svg{width:%;}}@media all and (max-width: 767px){.kb-row-layout-id118749_6bcb69-df > .kt-row-column-wrap{padding-top:28px;padding-right:16px;padding-bottom:25px;padding-left:16px;grid-template-columns:minmax(0, 1fr) minmax(0, 2fr);}.kb-row-layout-id118749_6bcb69-df .kt-row-layout-bottom-sep{height:px;}.kb-row-layout-id118749_6bcb69-df .kt-row-layout-bottom-sep svg{width:%;}}<\/style><div class=\"kb-row-layout-wrap kb-row-layout-id118749_6bcb69-df alignnone pro-tip-wrap wp-block-kadence-rowlayout\"><div class=\"kt-row-column-wrap kt-has-2-columns kt-row-layout-right-golden kt-tab-layout-right-golden kt-mobile-layout-right-golden kt-row-valign-top\">\n<style>.kadence-column118749_d2cc51-1d > .kt-inside-inner-col{display:flex;}.kadence-column118749_d2cc51-1d > .kt-inside-inner-col{min-height:45px;}.kadence-column118749_d2cc51-1d > .kt-inside-inner-col,.kadence-column118749_d2cc51-1d > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column118749_d2cc51-1d > .kt-inside-inner-col{row-gap:0px;column-gap:0px;}.kadence-column118749_d2cc51-1d > .kt-inside-inner-col{flex-direction:row;flex-wrap:wrap;align-items:center;}.kadence-column118749_d2cc51-1d > .kt-inside-inner-col > *, .kadence-column118749_d2cc51-1d > .kt-inside-inner-col > figure.wp-block-image, .kadence-column118749_d2cc51-1d > .kt-inside-inner-col > figure.wp-block-kadence-image{margin-top:0px;margin-bottom:0px;}.kadence-column118749_d2cc51-1d > .kt-inside-inner-col > .kb-image-is-ratio-size{flex-grow:1;}.kadence-column118749_d2cc51-1d > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column118749_d2cc51-1d{position:relative;}@media all and (max-width: 1024px){.kadence-column118749_d2cc51-1d > .kt-inside-inner-col{flex-direction:row;flex-wrap:wrap;align-items:center;}}@media all and (min-width: 768px) and (max-width: 1024px){.kadence-column118749_d2cc51-1d > .kt-inside-inner-col > *, .kadence-column118749_d2cc51-1d > .kt-inside-inner-col > figure.wp-block-image, .kadence-column118749_d2cc51-1d > .kt-inside-inner-col > figure.wp-block-kadence-image{margin-top:0px;margin-bottom:0px;}.kadence-column118749_d2cc51-1d > .kt-inside-inner-col > .kb-image-is-ratio-size{flex-grow:1;}}@media all and (max-width: 767px){.kadence-column118749_d2cc51-1d > .kt-inside-inner-col{flex-direction:row;flex-wrap:wrap;justify-content:flex-start;}.kadence-column118749_d2cc51-1d > .kt-inside-inner-col > *, .kadence-column118749_d2cc51-1d > .kt-inside-inner-col > figure.wp-block-image, .kadence-column118749_d2cc51-1d > .kt-inside-inner-col > figure.wp-block-kadence-image{margin-top:0px;margin-bottom:0px;}.kadence-column118749_d2cc51-1d > .kt-inside-inner-col > .kb-image-is-ratio-size{flex-grow:1;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column118749_d2cc51-1d kb-section-dir-horizontal kb-section-md-dir-horizontal inner-column-1 pro-tip-item1\"><div class=\"kt-inside-inner-col\"><style>.kb-image118749_61d26e-ae.kb-image-is-ratio-size, .kb-image118749_61d26e-ae .kb-image-is-ratio-size{max-width:45px;width:100%;}.wp-block-kadence-column > .kt-inside-inner-col > .kb-image118749_61d26e-ae.kb-image-is-ratio-size, .wp-block-kadence-column > .kt-inside-inner-col > .kb-image118749_61d26e-ae .kb-image-is-ratio-size{align-self:unset;}.kb-image118749_61d26e-ae figure{max-width:45px;}.kb-image118749_61d26e-ae .image-is-svg, .kb-image118749_61d26e-ae .image-is-svg img{width:100%;}.kb-image118749_61d26e-ae .kb-image-has-overlay:after{opacity:0.3;}<\/style>\n<div class=\"wp-block-kadence-image kb-image118749_61d26e-ae\"><figure class=\"aligncenter size-large\"><img decoding=\"async\" src=\"https:\/\/cld.partsimg.com\/image\/upload\/f_auto,dpr_auto,q_auto,c_pad\/carparts\/blog\/widgets\/protip\/services-icon\" alt=\"\" class=\"kb-img\"><\/figure><\/div>\n<\/div><\/div>\n\n\n<style>.kadence-column118749_db8946-c2 > .kt-inside-inner-col,.kadence-column118749_db8946-c2 > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column118749_db8946-c2 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column118749_db8946-c2 > .kt-inside-inner-col{flex-direction:column;}.kadence-column118749_db8946-c2 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column118749_db8946-c2 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column118749_db8946-c2{position:relative;}@media all and (max-width: 1024px){.kadence-column118749_db8946-c2 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column118749_db8946-c2 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column118749_db8946-c2 inner-column-2 pro-tip-item2\"><div class=\"kt-inside-inner-col\">\n<div class=\"protip-desc\">\n\t<div class=\"help-tip\">\n\t\t<p><strong>Pro Tips<\/strong> are nuggets of information direct from ASE-certified automobile technicians working with CarParts.com, which may include unique, personal insights based on their years of experience working in the automotive industry. These can help you make more informed decisions about your car.<\/p>\n\t<\/div>\n    <div class=\"help-caption\">\n        <p>\n            <strong>Pro Tip:<\/strong>\nThe good news is that you can use duct tape or just about any other good way to repair the moisture barrier even if it&rsquo;s torn or won&rsquo;t stick to the door any more. After all, it&rsquo;s hidden behind the door panel.\n        <\/p>\n    <\/div>\n<\/div>\n<\/div><\/div>\n\n<\/div><\/div><\/div><\/div>\n\n\n\n<h2 class=\"wp-block-heading\">What Does the Moisture Barrier Do?<\/h2>\n\n\n\n<p>The primary job of the vapor barrier is to block water vapor. It keeps the interior of your vehicle dry, ensuring your comfort and protecting various parts that might develop issues if exposed to moisture.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">As a Water Seal<\/h3>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"493\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/some-water-that-enters-the-car-door-during-heavy-rains-and-car-washes-1024x493.jpg\" alt=\"some water that enters the car door during heavy rains and car washes\" class=\"wp-image-122349\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/some-water-that-enters-the-car-door-during-heavy-rains-and-car-washes-1024x493.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/some-water-that-enters-the-car-door-during-heavy-rains-and-car-washes-300x145.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/some-water-that-enters-the-car-door-during-heavy-rains-and-car-washes-768x370.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/some-water-that-enters-the-car-door-during-heavy-rains-and-car-washes-1536x740.jpg 1536w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/some-water-that-enters-the-car-door-during-heavy-rains-and-car-washes-150x72.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/some-water-that-enters-the-car-door-during-heavy-rains-and-car-washes.jpg 1600w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption class=\"wp-element-caption\">While the door has weatherstrip seals that mostly prevent moisture from entering the gaps, there will always be some water that enters the door during heavy rains and car washes. This is why all vehicle doors will have drain holes in the bottom of the car doors. | Image Source: Richard McCuistian<\/figcaption><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Protects Wooden and Wood-Based Parts<\/h3>\n\n\n\n<p>Some vehicles have trim made of wood or a material based on wood. One popular material is particle board, an engineered product made from wood chips and a synthetic resin that binds the material together when heated and put under pressure.<\/p>\n\n\n\n<p>Wood looks great and can usually take a beating, especially if coated in a protective layer, such as varnish. However, the material remains vulnerable to moisture. If condensation forms on the surface of the wood, it can cause the material to swell and rot. Particle boards tend to rot faster than conventional wood material in the presence of moisture.<\/p>\n\n\n\n<p>Fortunately, the vapor barrier stops water vapor from condensing on the door panel, protecting nearby wood or wood-based trim from moisture.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What Happens If the Vapor Barrier Fails?<\/h2>\n\n\n\n<p>Vapor barriers generally last a long time unless somebody accidentally tears them off and doesn&rsquo;t put them back (and this happens more than you know) They need to be in place, but if they&rsquo;re not, nothing bad will happen; this isn&rsquo;t a car killer.<\/p>\n\n\n\n<p>If you remove the water barrier, it&rsquo;s best to reinstall or replace it before putting the door panel back in place.<\/p>\n\n\n\n\n\n\n<h2 class=\"wp-block-heading\">How to Replace a Car Door Moisture\/Vapor Barrier?<\/h2>\n\n\n\n<p>Installing a new vapor barrier doesn&rsquo;t require much experience in automotive repair. You can even perform the job yourself if you need to after doing work inside the door and have the door panel off anyway.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Home-Made Vapor Barrier<\/h3>\n\n\n\n<p>While you can get a vapor barrier from a shop, you can also use a home-made barrier. Find a sheet of heavy plastic film that fits over the door frame.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Attaching the Vapor Barrier<\/h3>\n\n\n\n<p>Most door vapor barriers use <a href=\"https:\/\/www.carparts.com\/butyl-tape\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"butyl tape\">butyl tape<\/a> to attach them to the door frame. Indeed, many car manufacturers also use the same type of adhesive tape on their stock water barrier.<\/p>\n\n\n\n<p>Older models might use tack strips to attach the vapor barrier. They pin the plastic sheet against the frame. Depending on the design, you might want to apply adhesive.<\/p>\n\n\n\n<p>Alternatively, you can get a tube of silicone adhesive. Apply the glue to the surface of the door frame before attaching the vapor barrier. Cut out the excess parts of the plastic film.<\/p>\n\n\n\n<p>What you shouldn&rsquo;t use is duct tape or other conventional tape. They can dry out over time, losing their stickiness and forcing you to clean them before using a different adhesive.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Cut Openings in the Vapor Barrier For Wires<\/h3>\n\n\n\n<p>Mark the spots on the plastic sheet where you must cut slits or holes for the wires to exit the door. Cut the openings and draw the wires out through them.<\/p>\n\n\n\n<p>Next, cut out patches from the excess plastic sheet. Place a patch over each opening to act as a waterproof cover. Apply butyl tape to the edges of the patch to seal the patch against moisture.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Where to Get a New Door Panel for Your Vehicle<\/h2>\n\n\n\n<p>Moisture is one of your cabin&rsquo;s worst enemies, especially for parts made of wood like particle boards. Unfortunately, moisture can accumulate inside the cabin when the moisture barrier breaks and eventually damages the door panel.<\/p>\n\n\n\n<p>When it&rsquo;s time to shop for an OE-grade <a href=\"https:\/\/www.carparts.com\/door-panel\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"door panel\">door panel<\/a>, look no further than <a href=\"http:\/\/carparts.com\" target=\"_blank\" rel=\"noreferrer noopener nofollow\" aria-label=\"CarParts.com\">CarParts.com<\/a>. We have a great selection of precision-engineered, aftermarket door panels. All our door panels passed stringent testing procedures, so you know they&rsquo;re built to last.<\/p>\n\n\n\n<p>Find the right door panel for your ride by entering your vehicle&rsquo;s specifications into our vehicle selector. Our user-friendly website is easy to navigate, so you&rsquo;ll be in and out within a few minutes with your order processed as soon as possible. For a more personalized shopping experience, use our search filters to refine the results according to your preferred brand, price range, quantity, and more.<\/p>\n\n\n\n<p>Never go over budget when you shop from us. All our products come with a low-price and lifetime replacement guarantee, helping you get the best value for your money. Order from our website or via our toll-free hotline, and we&rsquo;ll deliver the part you need straight to your doorstep in as fast as two business days. Shop now!<\/p>\n<\/body><\/html>\n","protected":false},"excerpt":{"rendered":"<p><span class=\"span-reading-time rt-reading-time\" style=\"display: block;\"><span class=\"rt-label rt-prefix\">Reading Time: <\/span> <span class=\"rt-time\"> 5<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span>Found in the doors of your car or truck, the moisture barriers behind the door panel prevent the inevitable water&#8230; <a href=\"https:\/\/www.carparts.com\/blog\/car-door-vapor-barrier-a-quick-guide\/\" rel=\"nofollow\">Read More<\/a><\/p>\n","protected":false},"author":4,"featured_media":118871,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_genesis_hide_title":false,"_genesis_hide_breadcrumbs":false,"_genesis_hide_singular_image":false,"_genesis_hide_footer_widgets":false,"_genesis_custom_body_class":"","_genesis_custom_post_class":"","_genesis_layout":"","footnotes":""},"categories":[3746,52],"tags":[1193],"ppma_author":[2607,2985],"class_list":{"0":"post-118749","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-car-body","8":"category-diy","9":"tag-door-panel","10":"entry"},"acf":{"adrotate_specific_mobile_ad":"","adrotate_specific_desktop_ad":""},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Car Door Vapor\/Moisture Moisture Barrier: a Quick Guide - In The Garage with CarParts.com<\/title>\n<meta name=\"description\" content=\"Have you ever wondered what the plastic sheet in your door is? Here\u2019s a quick guide to the simple yet critical vapor barrier.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.carparts.com\/blog\/car-door-vapor-barrier-a-quick-guide\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Car Door Vapor\/Moisture Moisture Barrier: a Quick Guide - In The Garage with CarParts.com\" \/>\n<meta property=\"og:description\" content=\"Have you ever wondered what the plastic sheet in your door is? Here\u2019s a quick guide to the simple yet critical vapor barrier.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.carparts.com\/blog\/car-door-vapor-barrier-a-quick-guide\/\" \/>\n<meta property=\"og:site_name\" content=\"In The Garage with CarParts.com\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/carpartscom\" \/>\n<meta property=\"article:published_time\" content=\"2024-09-20T10:23:20+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-01-03T02:01:51+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/car-vapor-barrier.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1500\" \/>\n\t<meta property=\"og:image:height\" content=\"1000\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@carpartscom\" \/>\n<meta name=\"twitter:site\" content=\"@carpartscom\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/car-door-vapor-barrier-a-quick-guide\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/car-door-vapor-barrier-a-quick-guide\\\/\"},\"author\":[{\"@type\":\"Person\",\"$id\":\"4\",\"name\":\"CarParts.com Research Team\",\"jobTitle\":\"Expert Automotive Writer\",\"description\":\"The CarParts.com Research Team is composed of experienced automotive and tech writers working with (ASE)-certified automobile technicians and automotive journalists to bring up-to-date, helpful information to car owners in the US. Guided by CarParts.com&#039;s thorough editorial process, our team strives to produce guides and resources DIYers and casual car owners can trust.\",\"knowsAbout\":\"Auto Repair, Car Maintenance, Auto Parts, Car Reviews\",\"publishingPrinciples\":\"\\\/blog\\\/our-team\\\/\",\"url\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/author\\\/thecpteam\\\/\",\"sameAs\":\"https:\\\/\\\/www.facebook.com\\\/carpartscom, https:\\\/\\\/twitter.com\\\/CarPartscom, https:\\\/\\\/www.youtube.com\\\/@CarPartscomOfficial\\\/, https:\\\/\\\/www.instagram.com\\\/carpartscom\\\/\"},{\"@type\":\"Person\",\"$id\":\"4\",\"name\":\"Richard McCuistian\",\"jobTitle\":\"ASE Master Automobile Technician\",\"description\":\"Richard McCuistian has worked for nearly 50 years in the automotive field as a professional technician, an instructor, and a freelance automotive writer for Motor Age, ACtion magazine, Power Stroke Registry, and others. Richard is ASE certified for more than 30 years in 10 categories, including L1 Advanced Engine Performance and Light Vehicle Diesel.\",\"knowsAbout\":\"Auto Repair, Car Maintenance, Auto Parts, Car Reviews\",\"publishingPrinciples\":\"\\\/blog\\\/our-team\\\/\",\"url\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/author\\\/richardmccuistian\\\/\",\"sameAs\":\"https:\\\/\\\/www.linkedin.com\\\/in\\\/richard-mccuistian-2681891b\\\/, https:\\\/\\\/www.youtube.com\\\/user\\\/McCuistian\"}],\"headline\":\"Car Door Vapor\\\/Moisture Moisture Barrier: a Quick Guide\",\"datePublished\":\"2024-09-20T10:23:20+00:00\",\"dateModified\":\"2025-01-03T02:01:51+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/car-door-vapor-barrier-a-quick-guide\\\/\"},\"wordCount\":1269,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/car-door-vapor-barrier-a-quick-guide\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/wp-content\\\/uploads\\\/2024\\\/09\\\/car-vapor-barrier.jpg\",\"keywords\":[\"door-panel\"],\"articleSection\":[\"Car Body\",\"DIY\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/www.carparts.com\\\/blog\\\/car-door-vapor-barrier-a-quick-guide\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/car-door-vapor-barrier-a-quick-guide\\\/\",\"url\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/car-door-vapor-barrier-a-quick-guide\\\/\",\"name\":\"Car Door Vapor\\\/Moisture Moisture Barrier: a Quick Guide - In The Garage with CarParts.com\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/car-door-vapor-barrier-a-quick-guide\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/car-door-vapor-barrier-a-quick-guide\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/wp-content\\\/uploads\\\/2024\\\/09\\\/car-vapor-barrier.jpg\",\"datePublished\":\"2024-09-20T10:23:20+00:00\",\"dateModified\":\"2025-01-03T02:01:51+00:00\",\"description\":\"Have you ever wondered what the plastic sheet in your door is? Here\u2019s a quick guide to the simple yet critical vapor barrier.\",\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/www.carparts.com\\\/blog\\\/car-door-vapor-barrier-a-quick-guide\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/car-door-vapor-barrier-a-quick-guide\\\/#primaryimage\",\"url\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/wp-content\\\/uploads\\\/2024\\\/09\\\/car-vapor-barrier.jpg\",\"contentUrl\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/wp-content\\\/uploads\\\/2024\\\/09\\\/car-vapor-barrier.jpg\",\"width\":1500,\"height\":1000,\"caption\":\"car vapor barrier\"},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/#website\",\"url\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/\",\"name\":\"In The Garage with CarParts.com\",\"description\":\"\",\"publisher\":{\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/#organization\",\"name\":\"CarParts.com\",\"url\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/wp-content\\\/uploads\\\/2025\\\/03\\\/cp-itg-logo.png\",\"contentUrl\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/wp-content\\\/uploads\\\/2025\\\/03\\\/cp-itg-logo.png\",\"width\":2048,\"height\":398,\"caption\":\"CarParts.com\"},\"image\":{\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/#\\\/schema\\\/logo\\\/image\\\/\"},\"sameAs\":[\"https:\\\/\\\/www.facebook.com\\\/carpartscom\",\"https:\\\/\\\/x.com\\\/carpartscom\",\"https:\\\/\\\/www.instagram.com\\\/carpartscom\",\"https:\\\/\\\/www.youtube.com\\\/@CarPartscomOfficial\\\/\"]},{\"@type\":\"Person\",\"@id\":\"\",\"url\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/car-door-vapor-barrier-a-quick-guide\\\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Car Door Vapor\/Moisture Moisture Barrier: a Quick Guide - In The Garage with CarParts.com","description":"Have you ever wondered what the plastic sheet in your door is? Here\u2019s a quick guide to the simple yet critical vapor barrier.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.carparts.com\/blog\/car-door-vapor-barrier-a-quick-guide\/","og_locale":"en_US","og_type":"article","og_title":"Car Door Vapor\/Moisture Moisture Barrier: a Quick Guide - In The Garage with CarParts.com","og_description":"Have you ever wondered what the plastic sheet in your door is? Here\u2019s a quick guide to the simple yet critical vapor barrier.","og_url":"https:\/\/www.carparts.com\/blog\/car-door-vapor-barrier-a-quick-guide\/","og_site_name":"In The Garage with CarParts.com","article_publisher":"https:\/\/www.facebook.com\/carpartscom","article_published_time":"2024-09-20T10:23:20+00:00","article_modified_time":"2025-01-03T02:01:51+00:00","og_image":[{"width":1500,"height":1000,"url":"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/car-vapor-barrier.jpg","type":"image\/jpeg"}],"twitter_card":"summary_large_image","twitter_creator":"@carpartscom","twitter_site":"@carpartscom","twitter_misc":{"Written by":"","Est. reading time":"1 minute"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.carparts.com\/blog\/car-door-vapor-barrier-a-quick-guide\/#article","isPartOf":{"@id":"https:\/\/www.carparts.com\/blog\/car-door-vapor-barrier-a-quick-guide\/"},"author":[{"@type":"Person","$id":"4","name":"CarParts.com Research Team","jobTitle":"Expert Automotive Writer","description":"The CarParts.com Research Team is composed of experienced automotive and tech writers working with (ASE)-certified automobile technicians and automotive journalists to bring up-to-date, helpful information to car owners in the US. Guided by CarParts.com&#039;s thorough editorial process, our team strives to produce guides and resources DIYers and casual car owners can trust.","knowsAbout":"Auto Repair, Car Maintenance, Auto Parts, Car Reviews","publishingPrinciples":"\/blog\/our-team\/","url":"https:\/\/www.carparts.com\/blog\/author\/thecpteam\/","sameAs":"https:\/\/www.facebook.com\/carpartscom, https:\/\/twitter.com\/CarPartscom, https:\/\/www.youtube.com\/@CarPartscomOfficial\/, https:\/\/www.instagram.com\/carpartscom\/"},{"@type":"Person","$id":"4","name":"Richard McCuistian","jobTitle":"ASE Master Automobile Technician","description":"Richard McCuistian has worked for nearly 50 years in the automotive field as a professional technician, an instructor, and a freelance automotive writer for Motor Age, ACtion magazine, Power Stroke Registry, and others. Richard is ASE certified for more than 30 years in 10 categories, including L1 Advanced Engine Performance and Light Vehicle Diesel.","knowsAbout":"Auto Repair, Car Maintenance, Auto Parts, Car Reviews","publishingPrinciples":"\/blog\/our-team\/","url":"https:\/\/www.carparts.com\/blog\/author\/richardmccuistian\/","sameAs":"https:\/\/www.linkedin.com\/in\/richard-mccuistian-2681891b\/, https:\/\/www.youtube.com\/user\/McCuistian"}],"headline":"Car Door Vapor\/Moisture Moisture Barrier: a Quick Guide","datePublished":"2024-09-20T10:23:20+00:00","dateModified":"2025-01-03T02:01:51+00:00","mainEntityOfPage":{"@id":"https:\/\/www.carparts.com\/blog\/car-door-vapor-barrier-a-quick-guide\/"},"wordCount":1269,"commentCount":0,"publisher":{"@id":"https:\/\/www.carparts.com\/blog\/#organization"},"image":{"@id":"https:\/\/www.carparts.com\/blog\/car-door-vapor-barrier-a-quick-guide\/#primaryimage"},"thumbnailUrl":"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/car-vapor-barrier.jpg","keywords":["door-panel"],"articleSection":["Car Body","DIY"],"inLanguage":"en-US","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/www.carparts.com\/blog\/car-door-vapor-barrier-a-quick-guide\/#respond"]}]},{"@type":"WebPage","@id":"https:\/\/www.carparts.com\/blog\/car-door-vapor-barrier-a-quick-guide\/","url":"https:\/\/www.carparts.com\/blog\/car-door-vapor-barrier-a-quick-guide\/","name":"Car Door Vapor\/Moisture Moisture Barrier: a Quick Guide - In The Garage with CarParts.com","isPartOf":{"@id":"https:\/\/www.carparts.com\/blog\/#website"},"primaryImageOfPage":{"@id":"https:\/\/www.carparts.com\/blog\/car-door-vapor-barrier-a-quick-guide\/#primaryimage"},"image":{"@id":"https:\/\/www.carparts.com\/blog\/car-door-vapor-barrier-a-quick-guide\/#primaryimage"},"thumbnailUrl":"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/car-vapor-barrier.jpg","datePublished":"2024-09-20T10:23:20+00:00","dateModified":"2025-01-03T02:01:51+00:00","description":"Have you ever wondered what the plastic sheet in your door is? Here\u2019s a quick guide to the simple yet critical vapor barrier.","inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.carparts.com\/blog\/car-door-vapor-barrier-a-quick-guide\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.carparts.com\/blog\/car-door-vapor-barrier-a-quick-guide\/#primaryimage","url":"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/car-vapor-barrier.jpg","contentUrl":"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/car-vapor-barrier.jpg","width":1500,"height":1000,"caption":"car vapor barrier"},{"@type":"WebSite","@id":"https:\/\/www.carparts.com\/blog\/#website","url":"https:\/\/www.carparts.com\/blog\/","name":"In The Garage with CarParts.com","description":"","publisher":{"@id":"https:\/\/www.carparts.com\/blog\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.carparts.com\/blog\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/www.carparts.com\/blog\/#organization","name":"CarParts.com","url":"https:\/\/www.carparts.com\/blog\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.carparts.com\/blog\/#\/schema\/logo\/image\/","url":"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2025\/03\/cp-itg-logo.png","contentUrl":"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2025\/03\/cp-itg-logo.png","width":2048,"height":398,"caption":"CarParts.com"},"image":{"@id":"https:\/\/www.carparts.com\/blog\/#\/schema\/logo\/image\/"},"sameAs":["https:\/\/www.facebook.com\/carpartscom","https:\/\/x.com\/carpartscom","https:\/\/www.instagram.com\/carpartscom","https:\/\/www.youtube.com\/@CarPartscomOfficial\/"]},{"@type":"Person","@id":"","url":"https:\/\/www.carparts.com\/blog\/car-door-vapor-barrier-a-quick-guide\/"}]}},"featured_image_src":"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/car-vapor-barrier.jpg","featured_image_src_square":"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/car-vapor-barrier.jpg","author_info":{"display_name":"","author_link":"https:\/\/www.carparts.com\/blog\/car-door-vapor-barrier-a-quick-guide\/"},"authors":[{"term_id":2607,"user_id":1651,"is_guest":0,"slug":"thecpteam","display_name":"CarParts.com Research Team","avatar_url":{"url":"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/04\/thecpteam.jpg","url2x":"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/04\/thecpteam.jpg"},"0":null,"1":"","2":"","3":"","4":"","5":"","6":"","7":"","8":""},{"term_id":2985,"user_id":1646,"is_guest":0,"slug":"richardmccuistian","display_name":"Richard McCuistian, ASE Certified Master Automobile Technician","avatar_url":{"url":"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/11\/richard-mccuistian.png","url2x":"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/11\/richard-mccuistian.png"},"0":null,"1":"","2":"","3":"","4":"","5":"","6":"","7":"","8":""}],"_links":{"self":[{"href":"https:\/\/www.carparts.com\/blog\/wp-json\/wp\/v2\/posts\/118749","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.carparts.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.carparts.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.carparts.com\/blog\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/www.carparts.com\/blog\/wp-json\/wp\/v2\/comments?post=118749"}],"version-history":[{"count":0,"href":"https:\/\/www.carparts.com\/blog\/wp-json\/wp\/v2\/posts\/118749\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.carparts.com\/blog\/wp-json\/wp\/v2\/media\/118871"}],"wp:attachment":[{"href":"https:\/\/www.carparts.com\/blog\/wp-json\/wp\/v2\/media?parent=118749"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.carparts.com\/blog\/wp-json\/wp\/v2\/categories?post=118749"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.carparts.com\/blog\/wp-json\/wp\/v2\/tags?post=118749"},{"taxonomy":"author","embeddable":true,"href":"https:\/\/www.carparts.com\/blog\/wp-json\/wp\/v2\/ppma_author?post=118749"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}