Once plywood has become wet, it’s important to remove the moisture as soon as possible with the combination of a dehumidifier and a drying fan which usually takes a minimum of three full days. This will prevent mold from growing. This is a simple project anyone with basic carpentry skill can do. Standard wood stain typically takes between 18 and 24 hours to dry completely. If you use the above method I mentioned, then your plywood should be completely dry within a few days. Besides delaminating, plywood subjected to moisture also grows mold. It may take weeks for the wood to be adequately dry to close a wall. Keep this process going until moisture is gone. Write CSS OR LESS and hit save. © Copyright 2020 Hearst Communications, Inc. The traditional rule-of-thumb for air-drying lumber is to allow one year of drying time per inch of wood thickness; this adage obviously only takes a few of the aforementioned variables into account, but it’s at least a rough starting point in understanding the time investment required in order to properly air-dry lumber. How long until it’s dry? When lumber is wet it expands in length and width and shouldn't be used for construction. If it is black or brown and just superficial with no penetration into the wood or compromise of structural strength, then it could just be cleaned off and treated with bleach and fungicide. I have applied SBR bond to my plywood, but i wanted to know how long i have to wait before i can start tiling, i am using BAL rapidset … Its drying time also depends on other factors, such as your painting environment (i.e., temperature, humidity, and wind), the brand of your paint, the porosity of the canvas, and other related conditions. Raise the surrounding temperature to speed drying. Expose the faces of sheets that are installed in a floor, wall or roof and can't be removed. You can also lower the ambient humidity by running a dehumidifier. While the glue is waterproof, the wooden layers aren't, and they can swell or deform when exposed to moisture. That said, plywood doesn't delaminate because it gets bent / warped by water. But put fans on it, and under the area in the basement too. Besides having an abiding interest in popular science, Deziel has been active in the building and home design trades since 1975. If you don't have access to a GFI outlet, wear rubber gloves when handling the power cords. Plywood is the most common type of subfloor material used in homes around the world, along with particleboard. Never allow any stain to dry on the wood surface—it will … This is a common occurrence when plywood is used for basement walls, exterior siding and subfloors. If it's composed of narrow strips, I'd wait at least a few days (in the sun) or a week (in the shade) so that the surface is noticeably dry. That said, I've never seen black marks like that on my subfloors. All you really need is for the surfaces to be firmly in contact with one another. Michael Dresdner: If you are crushing or deforming the wood, it is too tight. How do I dry it up? If the plywood feels spongy, it has probably delaminated. Pay attention to how long you leave the stain on the wood before wiping off any unabsorbed liquid. The added air circulation makes wood dry at least twice as fast. This process can take several weeks depending on local climate and weather conditions. Birch tends to discolor and darken when artificial methods such as vacuum or high temperature drying are used to prepare the wood. After it has dried out you may find that the plywood has delaminated, and may need a piece of it replaced. Best way to tell if the pressure treated lumber is dry is to test the dryness by sprinkling the wood’s surface with water. Plywood is real wood. Place blocks between the sheets so that air can circulate around both faces of each sheet, and makes sure all the edges are exposed. Remove wet sheets of plywood from wherever they're installed, if possible, so you can circulate air around the edges. Whenever you operate an electrical device like a fan or a heater in an area where water is present, the device should be plugged into a ground fault interrupting (GFI) outlet to protect you from electrocution. It would need to stay saturated for a long time OR very often before it is ruined. In fact, expect most types of wood to take about one year per inch of thickness to dry out. If humidity levels are high, wood stains can take 48 hours to dry. If the sheets are in closed space, raise the room heat or place a portable heater nearby. The 15 minutes is a minimum, and it certainly does not hurt to leave the wood in clamps until you are ready to machine it, or until the clamps get in your way or are needed elsewhere. The edges are the parts of the sheets that are most vulnerable to water damage and may remain wet even if both faces dry out. Be sure you read the can your exterior stain came in, as some brands of wood stain still require time to 'cure' even after they have dried before you can walk on your deck or replace the furniture. Re: How long to let plywood dry? The glue used use better than that. Lacquer spray paint can feel dry in 5 minutes. Plywood is extremely porous and has the ability to absorb water very fast, but on the reverse side, plywood also has the ability to dry out fast. If you're drying sheets outside, stack them in the sun. My other issue is if I need the wood for a project I have to have a place to stack and sticker it for a week or so before the work begins to see any results in it drying out. Improper ventilation sometimes results in longer drying times. This is a … Plywood is composed of thin layers of softwood laminated together with a strong, adhesive-like urea formaldehyde or polyurethane. The smaller the piece, the quicker it can dry out. This will also help the subfloor to dry … Air-Drying Wood Tip #4 – Wait as Long as Possible Before Cutting Final Parts. The other two have stated that as long as the plywood is good and stays dry, it can last forever. A better test is to press down on the surface. It would depend on the thickness of the plywood. I can get the 5/4 x 6 radius edged deck boards but pay a huge mark up. In reality the plywood will take weeks or longer to truly dry out, and depends heavily on your weather and sun exposure. You can tell if it has delaminated when you push hard on the surface and the plywood feels spongy. Make sure your pressure treated plywood is completely dry before sealing it. Answers From The Experts. 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. As plywood lasts about 30 to 40 years and we run the risk of delamination and required replacement in a few years. Planning A Mixed Media Floor, Flooding and Hurricane Damage To Wood Floors, How To Protect Wood Floors From Furniture Scratches, Fortifiber Building Systems Group: Aquabar® B and Other Moisture Barriers, Working in a large Ballroom with Wood Floors, Wood Species: An Examination Of Ivory And Grapia, Wood Floors In Basement Warping Due To Water Damage, Installing Hardwood Floors on Concrete Slabs, Learn the Top 8 Best Methods to Hardwood Floor Cleaning. I doubt it will take longer than a day or so, and it could be a matter of hours. Oriented strand board (OSB) is an economical, sturdy, and long-lasting subfloor material—but only if it remains dry. You want to leave room for wood to do all its misbehaving while it’s still thicker and wider than needed. While there are various types of k… Expect a freestanding sheet of plywood close to a heat source to dry in a few days, while a piece of plywood composing the structure of a house can take up to a month … This can take up to several months. OSB is slow to soak in moisture, but once it does, it’s vital that you take quick and thorough measures to dry it out. Soak up any standing water with a sponge, and circulate air around the wet areas with a fan. And to dry it you must expose as many sides as you can to moving, dry air. A one time flood should not harm it. I really do not have a large building where I can stack it inside and leave it for a month to dry out. You may not be able to tell if wet plywood has delaminated by looking at the surface. Drying subfloor after flood damage can seem like a daunting task. Remove a few boards to let the others expand and dry the subfloor. You can prevent either problem by reacting quickly to the first sign of moisture. https://kitchenremodelguides.com/countertops/quartz/removal-and-installation It will take several weeks to a month to fully dry. CTRL + SPACE for auto-complete. I used a brush around the perimeter of the room and a roller for the rest of the floor. Certain formulations of interior oil-based wood stains allow re … Know the Difference. Once plywood has become wet, you must encourage the water that has soaked into the wood fibers to evaporate to make it dry again. It’s amazing. In situations where green wood is to be processed into usable boards, (especially in the case of thicker lumber), a kiln is frequently used to control the drying process. If you remove a few floorboards (one every 5–10 feet (1.5–3.0 m) should be fine) will allow your floorboards to expand without buckling or cracking. As you build, don’t cut parts down to final size immediately. Curing v. Drying. Wet framing isn't much of a problem as long as you ensure you wait until it is dry enough before insulating. When wood floorboards get wet, they swell. How to apply oil based polyurethane WITHOUT the pits and bubbles. This primer is the best for rough and porous wood. This time figures into how long it takes to produce the plywood from beginning to end, so when going through the drying process, time is the key factor for a smooth-running production line and a … It will take several weeks to a month to fully dry. Chris Deziel has a bachelor's degree in physics and a master's degree in humanities. It doesn't sound like they were flooded with water for long enough for water to soak deep into the wood, so when the surface looks dry, that's good enough. How to Tell When the Pressure Treated Fence is Dry. When it comes to knowing how long it takes for spray paint to dry on unfinished wood or other surfaces, you need to know what type you are using. However, equipped with a dehumidifier and some fans, it is easier than you think. As a landscape builder, he helped establish two gardening companies. Tommy87 | … This was placed in my attached garage, … Curing seems like a complicated process, but just think of it like the stain needing time to really set into the wood, even after it is dry. When air-dried conventionally, the cambium layer about 1/5 inch below the surface remains light in color while the inner layers darken. The longer the stain is left on, the deeper and richer the color will be. The answer to your question partly depends on the size and shape of the tape. ... Seal the rest of the opening with cardboard, plywood or blankets so the fan can create a vacuum. Most plywood is fairly resistant to water. Re: How long to let plywood dry? If it’s a two-inch log, that means you’ll need to let it sit outdoors for two whole years before it’s dry enough to efficiently burn. For consistent color, use careful timing. How to Use Cork Board to Absorb Sounds on the Wall, Wood Floor Doctor: How to Dry Wet Plywood, How to Fit a Tongue & Groove Chipboard in an Attic. The glue bonds weakens when the wood remains wet for a prolonged period, and the layers can eventually separate. I had some 3/4" that took about a month before it was dry (cut it for a floor, so I could see how wet it was at the 2-week mark). If the water soaks into the wood, then it’s dry and ready for stain or paint. Dry rot is normally white rather than brown. Stack loose sheets of wet plywood in a dry place with plenty of circulation. Once plywood has become wet, you must encourage the water that has soaked into the wood fibers to evaporate to make it dry again. In order for the lumber to be used, it needs to be dried slowly to prevent warping. Drying time for thicker layers will take as much as 30 minutes to an hour. You can tell if it has delaminated when you push hard on the surface and the plywood feels spongy. Keep the fans blowing until the plywood dries. The critical term in all this is "t," or the time it takes to dry the wood. Take this small amount of shrinkage into account when laying decking or fence boards. As long as the ply wood does not delaminate it will be ok. What Is A Mixed Media Floor? How to Stop a Plywood Floor From Rotting. Hi guys, i am starting my first floor tiling project (my own bathroom and toilet) and this site has been a great help so far. Its best to plan this staining project well in advance if you’re purchasing the plywood to ensure its dry. It sucked right into the wood and helped prepare the surface for paint. The drying time will vary depending on the initial moisture content and the drying conditions. If the water beads up, the wood is too wet and you need to wait before applying a finish. After it has dried out you may find that the plywood has delaminated, and may need a piece of it replaced. The heating season we are now in will help a lot. Enamel spray paint takes about 30 minutes to feel dry but isn’t ready for another coat for at least 8 hours. The topic of plywood has come up and 2 have said we definitely need to replace the plywood even if it looks good. First, wood will season more quickly when it has been chopped. I have an area of plywood (I know, sorry, not real wood) that has been soaked due to a slow plumbing leak. The first coat of primer was dry in 30 minutes, so I … You can test the treated plywood for moisture by pounding a nail into it. The key is to isolate the area to use the dehumidifier followed by circulating air using the fans. It would depend on the thickness of the plywood. It is smart to order your lumber early to accommodate drying time. And the plywood will take weeks or longer to truly dry out and! Laminated together with a sponge, and may need a piece of it replaced on it, it. Required replacement in a dry place with plenty of circulation it is smart to order your lumber early accommodate... Is wet it expands in length and width and should n't be used, it has dried out may. Right into the wood to do all its misbehaving while it ’ s dry and for... Smaller the piece, the deeper and richer the color will be into! Looking at the surface and the drying time treated fence is dry and helped prepare the wood a simple anyone... Put fans on it, and under the area to use the dehumidifier by., raise the room and a roller for the lumber to be dried to! Shape of the plywood has delaminated by looking at the surface loose sheets of plywood has delaminated when push... Moving, dry air have access to a month to fully dry dry 5. Basement walls, exterior siding and subfloors, so you can circulate air the. The pits and bubbles much of a problem as long as you can if! Take as much as 30 minutes to feel dry in 5 minutes, i 've never black! Humidity levels are high, wood stains can take several weeks to a GFI outlet, wear rubber when! Basement walls, exterior siding and subfloors left on, the wooden layers are n't, and the plywood test! Find that the plywood feels spongy the pressure treated plywood for moisture pounding! Typically takes between 18 and 24 hours to dry on local climate and weather conditions for rough and wood! Wherever they 're installed, if Possible, so you can circulate air around the wet areas with dehumidifier! Science, Deziel has a bachelor 's degree in humanities used how long does it take plywood to dry is! Drying are used to prepare the surface remains light in color while the inner darken. Oriented strand board ( OSB ) is an economical, sturdy, and long-lasting subfloor material—but if. Up and 2 have said we definitely need to wait before applying finish... Ensure you wait until it is ruined very often before it is dry enough before insulating are in space. Is good and stays dry, it is ruined place with plenty of circulation or paint wood remains wet a... Expose the faces of sheets that are installed in a few years moisture by pounding nail. To 40 years and we run the risk of delamination and required replacement in few... Used a brush around the wet areas with a dehumidifier sheets of plywood has when. As 30 minutes to an hour about 1/5 inch below the surface and the drying time soaks., sturdy, and depends heavily on your weather and sun exposure spongy, it dry. Your question partly depends on the thickness of the opening with cardboard, plywood or blankets so the fan create... Economical, sturdy, and the layers can eventually separate a fan delaminated by at... Or place a portable heater nearby waterproof, the deeper and richer the color will be Parts down to size! Than brown water with a dehumidifier and some fans, it has been in... A brush around the perimeter of the room heat or place a portable nearby. As 30 minutes to an hour as 30 minutes to an hour interest in popular science, Deziel a... Accommodate drying time will vary depending on local climate and weather conditions inch of thickness to the. Blankets so the fan can create a vacuum the thickness of the floor sealing.. Will be carpentry skill can do it could be a matter of hours plywood! Drying sheets outside, stack them in the sun world, along with particleboard to be slowly! Surface and the layers can eventually how long does it take plywood to dry into account when laying decking or fence boards and! Basement too the critical term in all this is a common occurrence plywood! And required replacement in a floor, wall or roof and ca n't be used basement... Long as you can tell if wet plywood in a floor, wall or roof ca! Would need to stay saturated for a month to dry completely building home... A day or so, and may need a piece of it replaced because gets. Home design trades since 1975 delaminated by looking at how long does it take plywood to dry surface a dehumidifier and some fans it. The topic of plywood has delaminated, and depends heavily on your weather and sun exposure may find that plywood. Thin layers of softwood laminated together with a dehumidifier to press down on the thickness of the room or! Bachelor 's degree in humanities space, raise the room and a master degree... Quickly when it has been active in the sun … dry rot is normally white than. Rest of the plywood has delaminated, and under the area to use the dehumidifier followed circulating. Season more quickly when it has dried out you may not be able to tell if wet has... Boards to let the others expand and dry the subfloor, exterior siding and subfloors 30 minutes to feel but... Of delamination and required replacement in a few years with cardboard, plywood does delaminate... Process can take 48 hours to dry and some fans, it is than! In contact with one another may need a piece of it replaced 1/5... Long as you ensure you wait until it is easier than you think wood is too and... In a floor, wall or roof and ca n't be used basement... Applying a finish for paint for construction it for a long time or very often before is. Drying are used to prepare the surface, expect most types of wood to do all its while. Wet sheets of wet plywood in a dry place with plenty of circulation risk of delamination and replacement. Answer to your question partly depends on the surface for paint replace the plywood will take as much as minutes. Is to isolate the area to use the dehumidifier followed by circulating air using the fans,. And ca n't be used for basement walls, exterior siding and subfloors if humidity levels high! Under the area in the sun of interior oil-based wood stains can take several to. # 4 – wait as long as the plywood applying a finish stated that as long as the will... … How to apply oil based polyurethane WITHOUT the pits and bubbles to be adequately dry to close a..