This Spring, I was busy, busy building a big playhouse for my kids. . I hope to see you at next week’s party too! It typically comes in 4 x 8-foot sheets. This will ensure that the strength of the plywood is enough to bridge spots on the roof where the old plywood was weakened to the point that it would sag under the load on the roof. So, how much Liquid Rubber Deck Coating do you need? Start by patching any gaps in the plywood with Minwax Wood Filler or similar. Plywood will last many more years if it is properly sealed especially if you are doing an outdoor project. 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. 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. Now that you know How to Waterproof A Plywood Deck with Liquid Rubber Deck Coating, you can do it too. Or, you're plywood deck, roof or balcony might have special circumstances I don't cover in this tutorial. Spoiler Alert, I love this stuff! I applied 5 coats in total with a couple extra coats in the edges and around the posts, to be extra safe. If you use the above method I mentioned, then your plywood should be completely dry within a few days. If you bought good plywood and you wanted to stain and finish it, then this can be a problem. Once you have completed the above steps your plywood should be completely dry and ready for use. Snap a vertical chalk line 1/4 inch from the rake edge of the roof using a chalk box. Use the Liquid Rubber Deck Coating under the textile to stick it to all seams. Plywood is mostly available in 6, 9, 12, 17, 19, 25, 33mm thicknesses. Re: Soaking Wet Roof Decking My primary concern was the radiant barrier not allowing the plywood to dry to the inside. Should have fixed it then, and a friend did try, but for a long time it wasn't too bad. I used paper towels to gently wipe up that wet mixture of Liquid Rubber Deck Coating and Rain. 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. Shingle roofs are installed every day over wood decking that has been wet by rain. Like near a pool. The other day I was bringing some home from the store when I got caught in a storm. ********************************************************. Clean off the dust, then apply the primer to the entire surface with a large paint brush. First of all, let’s discuss what is plywood. With any excess water on wooden products, you will notice dark stains throughout the sheets. Check out this post which is one of the most popular of all time. What we need to do here is encourage that water out and make it evaporate. If that is the case, than the extent of the rot should be limited. I decided to start this site to educate others on the things I have learnt. I just had my site survey and they found out the tiles under our 40 yr old roof has no plywood underneath. If your plywood has only been exposed to a few hours of moisture or water than it can be saved. To discover how I saved my plywood sheets, keep reading the information I have put together. It’s so easy. Anyway, let’s get to those steps for how to waterproof a plywood deck, roof or balcony with Liquid Rubber Deck Coating. Damage to the edge of the plywood allows moisture to penetrate into the layers, and can cause separations. A textured surface might be best if you'll be walking on it with wet feet. I am the guy behind Woodwork Hubby! You've only seen one page. It depends on how much rain and for what duration. Generally, tearing off a roof and roof sheathing and perhaps roof framing, to remove mold would not be sensible nor cost-justified. Ensure that the line is square with the eave. This raises a question, can plywood get wet? Timber Grain also participates in affiliate programs with Bluehost, Clickbank, CJ, ShareASale, and other sites. In that case, you will need to install some sort of drain to get the standing water off of the deck. After 2 days or research, I decided to use Liquid Rubber Deck Coating to waterproof my plywood deck or roof. Not wet … I'm doing a lot of the work myself, help from a metal roofer with other skills. I’m so glad I used this on the upper deck of my Kids Playhouse from a Shed. Come party with us at Over The Moon! The top 3 sheets of plywood got wet and were actually soaked in water. AND, you can pick a smooth or textured version of Liquid Rubber, depending on what you want to use it for. Why is plywood … They could always change a formulation or the instructions after I write these steps. Liquid Rubber recommends 3 to 4 coats for waterproofing areas. You can see what happened in the video above. Use the Liquid Rubber Deck Coating under the textile to stick it to all seams. AFFILIATES HELP YOUR FAVORITE BLOGGERS DELIVER FREE CONTENT. As a result, the kitchen, hardwood flooring and walls were also destroyed. I thought I would share my experience and how I managed to save those sheets. This can be simple discoloration but should not affect the quality of your plywood in general. I called tech support at Polar-Ply and they said the aluminum coating is micro-perforated after it is applied. The best advice I can give when starting your workshop is to start off with second-hand tools to cut down on costs. It feels like walking on linoleum. But, some people need to waterproof a roof top deck or other surface without an open side for drainage. THIS POST CONTAINS AFFILIATE LINKS. Some Marine plywoods are guaranteed for 15-25 years but will depend on your use and location. That’s it for how to waterproof a plywood deck, roof or balcony with Liquid Rubber Deck Coating. So maybe you have dried your plywood out as much as possible, but what are the signs that my plywood has been ruined and can’t be saved? A textured surface might be best if you’ll be walking on it with wet feet. Why? Be sure to always read the directions on the containers to be sure you know how to waterproof a plywood deck. A: It is never a good idea to install a roof over wet plywood or any type of roof sheathing. Generally, plywood roof decking that has gotten wet and had the shingles applied over it, if … The spots that were wet mixed with rain water. 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. 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. Pinned and shared. 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. What are different types of roof decking ? 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? Easy to follow DIY steps and video showing how to waterproof a plywood deck, roof, or balcony with Liquid Rubber Deck Coating. This post is all about how to waterproof a plywood deck, roof or balcony with Liquid Rubber Deck Coating. Luckily, it didn’t ruin my deck. I used 40 grit sanding discs. Let me know if you have questions. But, the playhouse has a recessed upper deck on one half of the roof. Simply look along the surface to see if this is an issue for you. AND, you can pick a smooth or textured version of Liquid Rubber, depending on what you want to use it for. Yes, plywood is made from actual softwood fibers that do absorb water in the cell walls. Once the primer dries, apply the geo-textile on all edges and seams on the plywood deck, roof or balcony. Did you know you can replace the sanding pad on orbital sanders? Install the first metal panel on the low end of the roof, square to the eave. Abbotts At Home is not liable in any way for injury or loss resulting from any ideas or information provided. While the glue is waterproof, the wood fibers are not. It is more ‘water-resistant’. Speaking of OSB, it’s a top choice of homeowners looking for … Another reason for wet and rotted sheathing in the lower 1/3 of the roof is ice dams. You have to remember that plywood is simply layers of softwood glued together. Moisture causes wood to rot, and rotten wood absorbs water even more readily than fresh wood. You can see each step as I do it! Let that dry before applying the full first coat of Liquid Rubber on the surface. This form of plywood has hardwood layers instead of softwood so it will take much more exposure to water. 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. 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. 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. If you continue to use this site we will assume that you are happy with it. There’s always more than 1 way to do anything. It's 5/8" CDX. It will break down in sunlight and with large amounts of ongoing moisture. How long should the plywood on our roof be good before rotting? 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! The type of plywood you have can also affect the rate at which the water will absorb. 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. We use cookies to ensure that we give you the best experience on our website. In roofing, plywood can be used as roof decking. Although we did mention that there is an OSB today, which is manufactured to be resistant to wet conditions. Although extensive rain periods can be problematic if you see the plywood edges start to de-laminate. We're building a sunroom addition, nuts to do this in winter, especially this winter in the Atlanta area, but so it is. I use plywood in my workshop quite a lot for making jigs and some furniture. The result being that water wicks up and onto the plywood. Nice! And, here’s how to sharpen a chain saw with a Dremel. What Happens if it Rains on Wet Liquid Rubber Deck Coating??? 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. 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. A small amount of rain will not ruin plywood. 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. 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. It may take several hours but water will eventually soak through the layers of the wood. This will mean the layers of wood will get soaked by water which can start to affect their structural integrity. When my Dad and I framed out that deck, we sloped it a little for drainage. Plywood is made out of laminated sheets of veneer. I used this same process for my plywood and it worked a treat. Once the coating under the geo-textile mostly dries, you can apply a coat over the geo-textile. Don’t forget to sign up for the Abbotts At Home email newsletter to get DIY, Remodeling, and Crafty ideas in your inbox. How much Liquid Rubber Deck Coating do you need? However, leaving your plywood out in a rain event overnight is not a good idea. They could always change a formulation or the instructions after I write these steps. Prolonged exposure to rain can cause the softwood layers to de-laminate. 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. The felt serves as a backup to shingles for your first line of defense against environmental elements. Watch the video or read the steps below to see How to Waterproof A Plywood Deck. Watch this video to see exactly how to waterproof a plywood deck, roof or balcony with a Liquid Rubber Deck Coating. link to 8 Reasons Your Wood Glue Won't Dry (And What To Do), link to Ultimate Guide To Buying Used Woodworking Tools. The edges will also have the most severe discoloration. Inner plywood of roof wet. You can consider this as an advantage, but it can also have some drawbacks. Everything dried fine. If you press on the plywood and find it spongy all through it, then your plywood has de-laminated and will be ruined. Plywood is made from layers of thin softwood sheets glued together with alternating grain directions. I have been doing woodworking for over 30 years. It may take several hours but water will eventually soak through the layers of the wood. I hope this article was of benefit to you and helped you understand more about plywood getting wet. Plywood is the ideal material for places having a wet weather condition. I tried doing that, but when you live in a humid part of the south, unexpected showers pop up all the time. No single YouTube video or DIY tutorial can teach you everything you need to know or warn you about everything that might happen. We also participate in other affiliate programs which compensate us for referring traffic. Don’t be fooled thinking it is perfectly waterproof though. Once the primer dries, apply the geo-textile on all edges and seams on the plywood deck, roof or balcony. Plywood or OSB under EPDM ? 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. No mold yet. Attic insulation - combination of fiberglass covered by cellulose. Try to pick a few dry days in a row to waterproof your plywood deck, if possible. Or, this easy DIY for how to clean car seats at home. A tightly pressed A grade plywood will be better than a cheap sheet of OSB. If however your plywood has sat outside in the rain for a couple of days, the chances of it being any good are slim. It does exist and it is called Marine Grade Plywood or often called Marine Ply. 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. Or, you’re plywood deck, roof or balcony might have special circumstances I don’t cover in this tutorial. 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. I used 5 gallons of the Liquid Rubber on my 75 square foot deck. painting the plywood I highly recommend this article for the best results. look at the stamp on the plywood. But, all of the Liquid Rubber that was dry before the rain stayed dry. It normally gets plenty of sunny days to dry out so this plywood getting wet is not too much of an issue. In this case, your plywood may be ruined and you might have to use it on parts that don’t require visual perfection. Together with a trade qualification in Cabinetmaking, I feel I can make your time in the workshop more enjoyable! It feels like walking on linoleum. You can see them here, on my YouTube channel. My first coat of the Liquid Rubber Deck Coating was only about 70% dry when it was rained on. I love how this deck coating looks and it feels soft on bare feet. Be sure to always read the directions on the containers to be sure you know how to waterproof a plywood deck. Like most other things, there is no one right answer for the plywood This underlayment is ideal for 2:12 slopes or higher and is compatible with a wide variety of roofing materials. Reply Reply Author Discussion Renovation Original Poster 1,620 posts 81 months Tuesday 19th January 2016 Everyone seems to recommend OSB3 under … Many layers of these thin sheets are glued up to form different finished thicknesses of plywood. It helps protect against water entering the building. 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 … It also uses waterproof glue but excessive amounts of water over time can lead to its demise. 8 Reasons Your Wood Glue Won't Dry (And What To Do). That’s a clever way to keep water in your soil while extending the life of that wood. This is also on a wall behind our water expansion tank. Replace? 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). The only thing that may impact this life expectancy would be a … I applied 5 thick coats at about 1 gallon per coat. If it is in fact delaminating you either have the … Looking for more of my Easy DIY Home Improvement videos? Easy, right? Marine ply is not treated with any chemicals and therefore is not rot-resistant. Here I will let you know the steps to take in order to dry your plywood out completely. Nice! You can see how I do that in the video above. Roof decking is the material that lies on top of the main roofing structure, and the underlayment and roof covering are applied on top. This is a great tutorial. Roof felt serves as a protective layer between the structure and outer layer. Here at Roofing Superstore, we have a range of plywood boards that can be used for your project. Read the full disclaimer here. Let dry and sand smooth. That was easy enough to do since one side of the deck is open. . Types of Plywood Underlayment Most plywood underlayment is about 1/4 inch thick and has square edges and a smooth, knot-free top face. If that is the case, than the extent of the rot should be limited. 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. It may have some dark discoloring around the edges where the water has started to soak in. That’s probably right, my coats were probably thicker than they needed to be. The important thing is too keep it covered up and remove any excess water straight away.
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