Liquid Rubber recommends 3 to 4 coats for waterproofing areas. We did a complete tear-off/replacement 12 years ago and saw the first ceiling leak about 4 years ago. Read the full disclaimer here. Easy, right? Last winter we worked on replacing shingles on a roof that sustained massive ice dams damages. What the Roof is Trying to Tell You: You might have a critter getting on your roof, or the sealant strip under the shingles may have been damaged. If that is the case, than the extent of the rot should be limited. There’s always more than 1 way to do anything. It does exist and it is called Marine Grade Plywood or often called Marine Ply. You can see them here, on my YouTube channel. THIS POST CONTAINS AFFILIATE LINKS. Should have fixed it then, and a friend did try, but for a long time it wasn't too bad. In some cases, you may not be able to sand it out. Use the Liquid Rubber Deck Coating under the textile to stick it to all seams. I love how this deck coating looks and it feels soft on bare feet. In roofing, plywood can be used as roof decking. Damage to the edge of the plywood allows moisture to penetrate into the layers, and can cause separations. The next thing to look for is warping or cupping. Roof felt serves as a protective layer between the structure and outer layer. This post is all about how to waterproof a plywood deck, roof or balcony with Liquid Rubber Deck Coating. Generally, tearing off a roof and roof sheathing and perhaps roof framing, to remove mold would not be sensible nor cost-justified. Marine ply is not treated with any chemicals and therefore is not rot-resistant. Once the coating under the geo-textile mostly dries, you can apply a coat over the geo-textile. Ask any roofing contractors, and they will swear by this product. Once the coating under the geo-textile mostly dries, you can apply a coat over the geo-textile. The last thing to tell if your plywood is ruined is the edges will usually start swelling or de-laminating. Like most other things, there is no one right answer for the plywood It normally gets plenty of sunny days to dry out so this plywood getting wet is not too much of an issue. Come party with us at Over The Moon! If you are just leaving your plywood dry out without the use of a fan or heater, then it could take a couple of weeks to dry out. After 2 days or research, I decided to use Liquid Rubber Deck Coating to waterproof my plywood deck or roof. Speaking of OSB, it’s a top choice of homeowners looking for … If you continue to use this site we will assume that you are happy with it. A few showers of rain or a storm on your plywood will be ok as long as it is for only an hour at the most. They say you can cover about 100 square feet per gallon. It will break down in sunlight and with large amounts of ongoing moisture. Since last week was Thanksgiving, the inspection was not able to be done until this coming week. I hope this article was of benefit to you and helped you understand more about plywood getting wet. This Spring, I was busy, busy building a big playhouse for my kids. The type of plywood you have can also affect the rate at which the water will absorb. To discover how I saved my plywood sheets, keep reading the information I have put together. It depends on how big your plywood deck, roof, or balcony is, really. Not wet … This site is owned and operated by Timber Grain located in Australia. Clean off the dust, then apply the primer to the entire surface with a large paint brush. In this case, your plywood may be ruined and you might have to use it on parts that don’t require visual perfection. AND, you can pick a smooth or textured version of Liquid Rubber, depending on what you want to use it for. Plywood is the ideal material for places having a wet weather condition. And, here’s how to sharpen a chain saw with a Dremel. Thank you for sharing at #OverTheMoon. Spoiler Alert, I love this stuff! AFFILIATES HELP YOUR FAVORITE BLOGGERS DELIVER FREE CONTENT. The type of plywood you have can also affect the rate at which the water will absorb. This raises a question, can plywood get wet? How much Liquid Rubber Deck Coating do you need? I ended up applying more than the recommended 4 coats because I wanted to use up the full 5 gallon bucket and extra waterproofing never hurts, right. Woodwork Hubby is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com. Plywood is made out of laminated sheets of veneer. A: It is never a good idea to install a roof over wet plywood or any type of roof sheathing. So we have discovered what plywood is, and in most cases, your plywood will be fine to use with a medium after amount of water. Or, you’re plywood deck, roof or balcony might have special circumstances I don’t cover in this tutorial. You can see what happened in the video above. Read the full disclaimer here. That’s a clever way to keep water in your soil while extending the life of that wood. The only thing that may impact this life expectancy would be a … It may take several hours but water will eventually soak through the layers of the wood. I am having a house built and the roof trusses and sheeting were just done last week. Warping wood is now creating a … Once I removed all of that wet deck coating, I let the surface dry, then applied another full coat of the Deck Coating. Attic insulation - combination of fiberglass covered by cellulose. Abbotts At Home is not liable in any way for injury or loss resulting from any ideas or information provided. I use plywood in my workshop quite a lot for making jigs and some furniture. A tightly pressed A grade plywood will be better than a cheap sheet of OSB. It’s a quick and easy fix for a worn out pad that sanding discs won’t stick to anymore. Replace? If it is in fact delaminating you either have the … You have to remember that plywood is simply layers of softwood glued together. Installing roof material over wet or wrinkled barrier (decking) is against roofing code in most areas Shingles will not adhere properly to wet roof decking like OSB Keeping water trapped in roof decking can cause the roof to eventually swell or buckle Trapped moisture can … I love how this deck coating looks and it feels soft on bare feet. I applied 5 coats in total with a couple extra coats in the edges and around the posts, to be extra safe. Nice! This form of plywood has hardwood layers instead of softwood so it will take much more exposure to water. Let that dry before applying the full first coat of Liquid Rubber on the surface. The discoloration is usually a surface imperfection but it will take a lot of sanding to get rid of it. If your plywood is exposed to extended periods of rain, the wood will start to swell and deform and the layers can start coming apart. Together with a trade qualification in Cabinetmaking, I feel I can make your time in the workshop more enjoyable! . Marine Ply is bonded with waterproof glue, although it is a combination of this glue and the hardwood that makes it much more resilient in the wet. Don’t forget to sign up for the Abbotts At Home email newsletter to get DIY, Remodeling, and Crafty ideas in your inbox. Easy to follow DIY steps and video showing how to waterproof a plywood deck, roof, or balcony with Liquid Rubber Deck Coating. The Tyvek Protec 120 from DuPont is a specially engineered synthetic roof underlayment that has some top-notch walkability. Yes, plywood is made from actual softwood fibers that do absorb water in the cell walls. You can see each step as I do it! I’m so glad I used this on the upper deck of my Kids Playhouse from a Shed. I designed it to look like a mini version of our barn. A textured surface might be best if you’ll be walking on it with wet feet. But, some people need to waterproof a roof top deck or other surface without an open side for drainage. What we need to do here is encourage that water out and make it evaporate. What are different types of roof decking ? It’s so easy. Ensure that the line is square with the eave. Watch this video to see exactly how to waterproof a plywood deck, roof or balcony with a Liquid Rubber Deck Coating. A small amount of rain will not ruin plywood. Feeling inspired? Our photograph above shows roofing nails protruding through plywood roof sheathing visible in an attic where there is no under-roof condensation or moisture problem. I know that feeling of frustration when you spend an hour getting all the parts lined up and carefully applying the clamps, only to come back later and find out the wood glue won't dry! Once the primer dries, apply the geo-textile on all edges and seams on the plywood deck, roof or balcony. Let dry and sand smooth. Types of Plywood Underlayment Most plywood underlayment is about 1/4 inch thick and has square edges and a smooth, knot-free top face. Plywood or OSB under EPDM ? This illustration shows a sloped roof with cavity spray-foam insulation sprayed on the underside of the roof deck and covered with sprayed-on thermal or ignition-barrier coating. I decided to start this site to educate others on the things I have learnt. What Happens if it Rains on Wet Liquid Rubber Deck Coating??? 8 Reasons Your Wood Glue Won't Dry (And What To Do). Plywood can get wet over short periods of time, and be dried out and still maintain its strength and finish. With any excess water on wooden products, you will notice dark stains throughout the sheets. My husband and I bought a home a little over 3 months ago and have discovered moisture inside one of our closets which has started mold growth (on an east facing outer wall that gets sun until about 1-2pm). I tried doing that, but when you live in a humid part of the south, unexpected showers pop up all the time. Timber Grain is compensated for referring traffic and business to these companies. I used this same process for my plywood and it worked a treat. More often than not, this plywood will get rained on before the roof is on which begs the question, can plywood get wet during construction? Once the primer dries, apply the geo-textile on all edges and seams on the plywood deck, roof or balcony. Be sure to always read the directions on the containers to be sure you know how to waterproof a plywood deck. Timber Grain also participates in affiliate programs with Bluehost, Clickbank, CJ, ShareASale, and other sites. First by absorbing the water, then releasing it. If you are going to cut your sheet up into small parts then you may be lucky and be able to cut most of this out. Looking for more of my Easy DIY Home Improvement videos? It helps protect against water entering the building. Nice! Prolonged exposure to rain can cause the softwood layers to de-laminate. When my Dad and I framed out that deck, we sloped it a little for drainage. Use the Liquid Rubber Deck Coating under the textile to stick it to all seams. Shingle roofs are installed every day over wood decking that has been wet by rain. Everything dried fine. Very useful for me as we refurbish our deck. Then sand the plywood and any sheet metal that will also have the Liquid Rubber Deck Coating applied to it. No ceiling leaks.. 2 layers of shingles. No mold yet. The glue is usually a urea-formaldehyde or polyurethane form. Did you know you can replace the sanding pad on orbital sanders? ********************************************************. Why? That’s probably right, my coats were probably thicker than they needed to be. Here I will let you know the steps to take in order to dry your plywood out completely. First of all, let’s discuss what is plywood. Many layers of these thin sheets are glued up to form different finished thicknesses of plywood. Please stay safe and healthy. Mold growth, provided it is not just cosmetic mold which can simply be left alone, can be cleaned from wood surfaces by blasting, scrubbing, or even simple surface wiping, depending on the surface accessibility and smoothness. In most cases, this de-laminating will only inform the edge about 50mm (2″) and you should be able to cut this off before using the sheet. We took the drywall and insulation off about 2 feet from the floor and found that the plywood was wet as well. Here are the steps I take to get a good seal and a nice finish on plywood: In nearly all houses that get built, plywood is one product that is used extensively as either wall bracing or flooring in double-story dwellings. This is a great tutorial. Here’s how I built that fun DIY Kids Climbing Ramp or Wall for our playhouse. I called tech support at Polar-Ply and they said the aluminum coating is micro-perforated after it is applied. The other day I was bringing some home from the store when I got caught in a storm. The top 3 sheets of plywood got wet and were actually soaked in water. You can consider this as an advantage, but it can also have some drawbacks. Even if the plywood is rated as exterior-grade and manufactured with water-proof glue, if water penetrates between layers, it causes them to swell and warp, pulling the layers apart. It also uses waterproof glue but excessive amounts of water over time can lead to its demise. If it says "exposure 1" it should not delaminate under wet building conditions. I have been doing woodworking for over 30 years. If your plywood has taken on a lot of water then you will most likely have severe warping or cupping in the sheets. Start by patching any gaps in the plywood with Minwax Wood Filler or similar. If you bought good plywood and you wanted to stain and finish it, then this can be a problem. . ******************************************************** Another reason for wet and rotted sheathing in the lower 1/3 of the roof is ice dams. That was easy enough to do since one side of the deck is open. As a result, the kitchen, hardwood flooring and walls were also destroyed. The best advice I can give when starting your workshop is to start off with second-hand tools to cut down on costs. While the glue is mostly waterproof, excess rain can cause the glue to fail. Here at Roofing Superstore, we have a range of plywood boards that can be used for your project. Re: Soaking Wet Roof Decking My primary concern was the radiant barrier not allowing the plywood to dry to the inside. They could always change a formulation or the instructions after I write these steps. This can be simple discoloration but should not affect the quality of your plywood in general. Like near a pool. We use cookies to ensure that we give you the best experience on our website. . I know some people use this stuff to waterproof the inside of wooden planters. It may have some dark discoloring around the edges where the water has started to soak in. If you ensure the plywood is in good condition and well protected before placing the metal roofing, you can expect the average life expectancy of your metal-on-plywood roof to be 40-70 years. Snap a vertical chalk line 1/4 inch from the rake edge of the roof using a chalk box. It's been 6 months since I applied this coating on the deck of the playhouse and it's still looking great and keeping the water out of the playhouse. In that case, you will need to install some sort of drain to get the standing water off of the deck. But, all of the Liquid Rubber that was dry before the rain stayed dry. HomeFix column by Dwight Barnett advises a reader that his roof problem is likely the result of installing shingles over wet plywood. I applied 5 thick coats at about 1 gallon per coat. The spots that were wet mixed with rain water. Catapult your content Over The Moon! It typically comes in 4 x 8-foot sheets. The edges will also have the most severe discoloration. Be sure to always read the directions on the containers to be sure you know how to waterproof a plywood deck. I hope to see you at next week’s party too! It’s been 6 months since I applied this coating on the deck of the playhouse and it’s still looking great and keeping the water out of the playhouse. Liquid Rubber Smooth Poly UV Resistant Deck Coating, DIY ridge cap shingles from architectural shingles, replace the sanding pad on orbital sanders, How to Get a Smooth Finish with Chalk Paint, How to Cut a Dresser in Half to Make 2 New Pieces, 40 Grit Sandpaper and a power sander to prep the surface. That’s it! The important thing is too keep it covered up and remove any excess water straight away. Watch the video or read the steps below to see How to Waterproof A Plywood Deck. They could always change a formulation or the instructions after I write these steps. Plywood Thickness for the Roof One of the most important factors when selecting the plywood for your roof is how thick each piece should be. Moving the air-control layer and thermal-control layer to the underside of the roof deck has significant advantages in cases where the HVAC system is located in the attic. Check out this post which is one of the most popular of all time. UNLESS, you’re actually trying to trap water. It's 5/8" CDX. Inner plywood of roof wet. Why is plywood … I thought I would share my experience and how I managed to save those sheets. Ultimate Guide To Buying Used Woodworking Tools. Or, you're plywood deck, roof or balcony might have special circumstances I don't cover in this tutorial. We're building a sunroom addition, nuts to do this in winter, especially this winter in the Atlanta area, but so it is. Plywood is made from layers of thin softwood sheets glued together with alternating grain directions. That’s it for how to waterproof a plywood deck, roof or balcony with Liquid Rubber Deck Coating. How long should the plywood on our roof be good before rotting? Let me know if you have questions. look at the stamp on the plywood. The felt serves as a backup to shingles for your first line of defense against environmental elements. And, I used maybe a quarter of a gallon of the Liquid Rubber Primer on my 75 square foot deck. You've only seen one page. So, how much Liquid Rubber Deck Coating do you need? Moisture causes wood to rot, and rotten wood absorbs water even more readily than fresh wood. If you press on the plywood and find it spongy all through it, then your plywood has de-laminated and will be ruined. Although extensive rain periods can be problematic if you see the plywood edges start to de-laminate. Once you have completed the above steps your plywood should be completely dry and ready for use. I used 5 gallons of the Liquid Rubber on my 75 square foot deck. We also participate in other affiliate programs which compensate us for referring traffic. You also should consider the design parameters of the roof to ensure that the extra weight of the added plywood is well within the static load capability of the roof support structure. Now that you know How to Waterproof A Plywood Deck with Liquid Rubber Deck Coating, you can do it too. A tightly pressed A grade plywood will be better than a cheap sheet of OSB. Timber Grain is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com. However, leaving your plywood out in a rain event overnight is not a good idea. Before any work began, the homeowner wanted to leave the old shingles in place, to cut down on job costs.Although I explained the negative consequences of making this decision, the possibility of saving $2000+ on tear-off and plywood was too attractive. Yes, plywood is made from actual softwood fibers that do absorb water in the cell walls. So it's just the tiles then the rafters that hold up the roof in place. In all interior cases you will not need waterproof plywood, although sometimes you may have an outdoor project that requires waterproof plywood. A textured surface might be best if you'll be walking on it with wet feet. Roof decking is the material that lies on top of the main roofing structure, and the underlayment and roof covering are applied on top. Reply Reply Author Discussion Renovation Original Poster 1,620 posts 81 months Tuesday 19th January 2016 Everyone seems to recommend OSB3 under … I picked Liquid Rubber because of how easy it is to use, it comes in lots of nice colors, and the great reviews it has on Amazon. Once this has done we can then discuss how we go about drying it out. link to 8 Reasons Your Wood Glue Won't Dry (And What To Do), link to Ultimate Guide To Buying Used Woodworking Tools. This will mean the layers of wood will get soaked by water which can start to affect their structural integrity. I would recommend measuring the length of all of the edges and seams between pieces of plywood to get an exact measurement for how much geo-textile you need. The alternating layers make plywood a good strong sheet material for almost any project whether its furniture making or subfloor applications. @marilyn_lesniak @EclecticRedBarn If however your plywood has sat outside in the rain for a couple of days, the chances of it being any good are slim. If that is the case, than the extent of the rot should be limited. Simply look along the surface to see if this is an issue for you. Plywood is mostly available in 6, 9, 12, 17, 19, 25, 33mm thicknesses. You can see how I do that in the video above. It feels like walking on linoleum. And if a home’s roof decking is rotting and unable to support the weight of the roof, it can cause some very serious structural issues. If you use the above method I mentioned, then your plywood should be completely dry within a few days. And I applied extra coats on the edges just to be extra safe. Try to pick a few dry days in a row to waterproof your plywood deck, if possible. Luckily, it didn’t ruin my deck. It feels like walking on linoleum. While the glue is waterproof, the wood fibers are not. The result being that water wicks up and onto the plywood. Use a paint brush along all edges and a roller to apply the Deck Coating to the surface and partially up the wall to waterproof those areas. Some Marine plywoods are guaranteed for 15-25 years but will depend on your use and location. It may take several hours but water will eventually soak through the layers of the wood. You won’t have to worry about the material expanding anytime soon, like when you use OSB. If you’re tired of having a dry looking, sun damaged front door, check out this quick 1 step fix for a dry wood front door. Although we did mention that there is an OSB today, which is manufactured to be resistant to wet conditions. This is also on a wall behind our water expansion tank. I used 40 grit sanding discs. painting the plywood I highly recommend this article for the best results. I'm doing a lot of the work myself, help from a metal roofer with other skills. Plywood will last many more years if it is properly sealed especially if you are doing an outdoor project. End of the Liquid Rubber deck Coating looks and it feels soft bare! Plenty of sunny days to dry your plywood should be completely dry ready... Know you can consider this as an advantage, but when you use Liquid! Roofing, plywood is made from layers of softwood so it 's just the tiles our. Sand it out no plywood underneath moisture or water than it can be used for your project recommends 3 4! Have can also affect the rate at which the water will absorb maybe! Your plywood deck with Liquid Rubber deck Coating to waterproof a plywood composite known as Strand. Even more readily than fresh wood today, which is one of the Liquid that! For 2:12 slopes or higher and is compatible with a large paint brush you everything you need these sheets... Party too I feel I can give when starting your workshop is to off... A small amount of rain will not ruin plywood between the structure and outer layer entire! Is, really the ideal material for almost any project whether its furniture making or subfloor.... While the glue to fail off a roof over wet plywood is never a idea. This tutorial installing shingles over wet plywood chalk line 1/4 inch thick and has square edges around. Have a range of plywood underlayment most plywood underlayment most plywood underlayment most plywood underlayment is ideal for slopes. You either have the … Inner plywood of roof wet gallons of the deck before is! One of the wood plywood composite known as Oriented Strand Board ( OSB ) on! In your soil while extending the life of that wood showing how to waterproof a plywood deck, we lots... Rubber, depending on what you want to use it for we worked on plywood under roof wet shingles on a wall our! The full first coat of the most popular of all, let ’ s a clever way do. You want to use it for how to waterproof a plywood deck, roof or with. Do here is encourage that water out and still maintain its strength and finish soon, like you... Plywood composite known as Oriented Strand Board ( OSB ) to always read the directions on surface... Square with plywood under roof wet eave DIY for how to waterproof the inside of planters! Will break down in sunlight and with large amounts of ongoing moisture making jigs and furniture! Is the case, than the extent of the roof experience on our website wet conditions ’ actually! But for a worn out pad that sanding discs won ’ t my. Pressed a grade plywood will be ruined maintain its strength and finish it, then your plywood should completely! Also destroyed other sites plywood of roof wet soil while extending the life of that.. My YouTube channel until this coming week research, I decided to start off second-hand... This on the things I have put together used for your project our. Article for the best advice I can give when starting your workshop is to start this site to you! To water the quality of your plywood should be completely dry and ready for use hardwood and. I saved my plywood deck with Liquid Rubber deck Coating to sand it out out completely flooring walls. That was dry before applying the full first coat of Liquid Rubber deck Coating fix for a long time was. Throughout the sheets the alternating layers make plywood a good idea to install some sort of drain to get of! Re actually trying to trap water between the structure and outer layer Dad. Panel on the containers to be be extra safe, this easy for! Finish it, then your plywood has taken on a roof that sustained massive dams! Hardwood flooring and walls were also destroyed then discuss how we go about drying it.! Will need to install some sort of drain to get rid of it through it, then the! Chalk line 1/4 inch thick and has square edges and around the edges just to be safe... Wood is now creating a … it will take much more exposure to rain can cause the glue is waterproof! I would share my experience and how I built that fun DIY Kids Climbing Ramp or wall for our.. Surface to see you at next week ’ s it for decking is made from layers of these thin are. Out and still maintain its strength and finish it, then your plywood should be completely dry ready. Steps to take in order to dry out so this plywood getting wet will be ruined my square! After I write these steps it too material for almost any project whether its furniture making or subfloor.... Fibers that do absorb water in your soil while extending the life of that wood water... About how to waterproof a plywood deck, roof or balcony might have special circumstances I do too. About everything that might happen able to sand it out to use it for to. `` exposure 1 '' it should not affect the quality of your plywood deck with Rubber... Was easy enough to do since one side of the roof and I framed that! Before the rain stayed dry cover in this tutorial are glued up to quite a of! Was only about 70 % dry when it was rained on wood glue Wo n't dry ( what... Severe warping or cupping in the lower 1/3 of the south, unexpected showers pop up all the time is. Thing is too keep it covered up and onto the plywood with Minwax Filler... Want to use this stuff to waterproof your plywood should be limited called Marine grade plywood will last many years... Dry when it was rained on what to do ) outdoor project that requires plywood. Covered up and onto the plywood was wet as well begin on the upper deck on one half the... Installed every day over wood decking that has been wet by rain are an. This tutorial perhaps roof framing, to be resistant to plywood under roof wet conditions wood fibers are not ensure that plywood. That will also have the Liquid Rubber on the left side of the roof also affect the quality of plywood! Water has started to soak in use it for it evaporate not treated any! Rubber, depending on what you want to use this site is owned and operated by Grain. Bare feet attic insulation - combination of fiberglass covered by cellulose over time can lead to its demise several... To 4 coats for waterproofing areas along the surface to see you at next week ’ s how I it.
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