how to seal plywood subfloor

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Some of the links on this sites are affiliate links #ad. To prepare the plywood, you will need to sand the surface to remove any dirt, debris, and loose particles. You can start by sanding the surface to remove any loose particles, dirt, or debris. Plus, sanding will remove any loose particles of wood that might detach after it has been painted. Read on to find out more This means that the plywood is on the outside of the home such as a deck. The oil itself can be applied across the surface of the wood evenly and allowed to soak in to seal it up. There are several different methods of waterproofing that can be used to protect plywood. Living free…no matter the cost. This is an oil that as the name implies penetrates the surface of the wood which seals it against intrusion by moisture. ... then gluing and/or nailing the pieces to the subfloor. Drive screws every 8 inches around the perimeter of each board, 1/2-inch from the edges and 2 inches from the corners. Seal the edges of the the tape by painting over them with your base color. I pried up all the oak flooring down to the subfloor, used Nature's Miracle (didn't work well enough) and then used KILZ water-base to seal it. However, painting can be used in most situations involving plywood as it is relatively inexpensive, versatile, effective, and long-lasting. Plywood has four sides that need to be sealed regardless of the material they butt up against. This means that it can resist the elements for a long time. Otherwise, you can use the product as the first coat, let it dry, then add a layer of paint over the top. Here are some possibilities: A 2-to-1 mixture of warm water and white vinegar** . Apply wood sealants in a well-ventilated area with doors and windows open. Once the components of the epoxy meet, they tend to dry and harden quickly to create a protective layer on the surface of the plywood. He studied organizational communications at Brigham Young University. While it does offer some protection, the constant wind, sunlight, and exposure to moisture will dry out the oil that is near the surface over time. Depending on the size of the job, you may want to get professional assistance to ensure that it is done right. This is a popular type of sealant that can be easily used on most plywood. Cut the tip off of a tube of elastomeric caulk using a utility knife. For whatever reason, the contractor left gaps between each piece, 1/8" to 1/4" wide. Although it may be easier and less time-consuming than paint or a spray epoxy, the oil itself will need to be reintroduced far more frequently unless the plywood itself remains out of the elements. I have a loft area that is floored in 4'x4' sections of 3/4" particle board in good condition. You should choose the one that best suits your needs. Painting is one of the most common methods of sealing plywood and one of the most cost-effective. Your painted sub floor looks nice…. During this time, the caulk has a tendency to shrink while drying. Cut the tip off of a tube of elastomeric caulk using a utility knife. One disadvantage is that most plywood is not waterproof. Repeat sanding with 120-grit sandpaper. Understanding the Upgrades: Enhanced Plywood and Subfloor Products. Sorensen is a licensed truck driver, certified forklift operator and a journeyman painter. Sand all sides of the plywood using 80-grit sandpaper. Plywood Substrate Alternatives . 1 Acre Homestead. Use 1 1/4-inch screws for 1/4-inch backerboard. Q: do you need to seal the painted plywood floors after you are finished painting? Varnish vs Lacquer vs Polyurethane vs Shellac, 15 Types of Wood Joints – Names & Pictures, Protects from Humidity and Ultraviolet (UV) Rays. Arrange the plywood on the floor so the joints of this layer do not align with the subfloor joints below. How to Seal Plywood Step 1. Keep in mind that the waterproofing process does take time and effort. However, if we were painting a pattern on the floors or stenciling the floors, I think sealing … The safest, most prudent course is to install tile on top of a cement backerboard such as Durock, Wonderboard, or HardieBacker. Backerboard does not shrink or expand when it comes into … This means that you should use penetrating oil on plywood that is not going to be outdoors unless you want to reapply it frequently. You should use a penetrating oil that is designed for the wood itself. Once you have exposed the stain on the subfloor, it’s time to treat it. Cement backerboard is made for tiling. You could … Wait 24 hours. The caulking gun is loaded and ready for action. Step 1. We finally tackled those problematic floors - ya know, the ones that sent me to the ER?! Seal the seams before flooring, roofing or siding is installed. You simply need to choose the method that works best for your needs. The benefits associated with sealing plywood include the following. Anyhow, there are 8 joints about 20' long that I want to fill in. By sealing these seams, moisture, insects, dust and air can't permeate into a home. Waterproofing plywood is relatively straightforward. But just as importantly it can decorate the plywood if the exterior is going to be seen. This helps the paint to attach to the wood and create a smooth surface which is quite desirable both in visual terms and texture. Primer ensures the paint will adhere and also help seal down any loose plywood chips. Spray-on latex is essentially the same as paint as it provides a layer that sticks to the surface which seals up the porous plywood. Preservatives are one way of protecting plywood floors against rot. Cody Sorensen has been writing professionally since 2009. The oil is best used on plywood that is not exposed to the elements. Plus, it will need to be repeated from time to time for maximum benefit. ** Spray this over the affected area, or spread it with a brush, and... A 3 percent hydrogen peroxide solution** . You can paint a deck, wall, or other objects that are crafted from plywood. ; 2006. Cut the end of the silicone caulk nozzle at a 45 degree angle using a utility knife. You need to at least seal the top side of your plywood and the edges, you can seal the bottom side of the plywood if you want or think it'll get wet. You must prepare the surface by sanding it smooth. Store particle board inside before installation. Plywood used as a subfloor, wall underlayment or roof sheathing needs to have the seams sealed with caulk. Squish the bead into the seam with your finger and then wipe excess off with a wet painter's rag. This is an oil that as the name implies penetrates the surface of the wood … When the time comes to repaint the plywood, you will need to strip the old paint away first, sand the surface again, then add at least two coats of new paint or spray-on latex to do the job. Even if the plywood is not going to be exposed to the elements, the benefits of sealing are strong enough that it should be used in most circumstances. references How To Clean Stuff: How To Clean Particle Board Subflooring The Daily Puppy: How To Seal Pet Stains On Subflooring Show Comments you may like. Painting or spray-on latex is generally best for surfaces that will be directly exposed to the elements. Set all screw heads slightly below the surface. Apply more caulk in these areas. Take the sub out of subfloor. Secure the plywood to the subfloor at 6-inch intervals with 1-inch deck screws placed along the edges. The first step to protecting your plywood is to determine whether you are dealing with an indoor or an outdoor setting, since each has its own concerns. This means one that is meant to be used for waterproofing and keeps the wood moist enough so that it retains its flexibility and strength. Unsealed seams diminish the effectiveness of the cooling and heating systems of a home which can adversely affect utility costs. Many times the subfloor swells or the wood is rotten, so replacing it looks better and makes it safer. Best power tools guide, tips and reviews. This episode: Vlog 69 – Seal up the floor so I can move on to the framing! From building homes to creating decks to crafting particular items, plywood is relatively inexpensive, durable, and comes in different types that are flexible for your needs. But there are a few important considerations to take into account when tiling over a wood subfloor. Once you have completed painting the plywood, you will need to add a new coat from time to time depending on the wear it receives. Arrange the plywood on the floor so the joints of this layer do not align with the subfloor joints below. While there are certain types that are water-resistant such as marine plywood, all plywood will need some type of waterproofing if you want to protect it from the humidity. You'll need to know how to level a floor: Just sand any high spots and fill the low spots with leveling compound. Poke the foil at the … Helpful tips on how to pour self leveling concrete over a wood subfloor. The following demonstrates the best methods for sealing plywood. The use of a plywood subfloor topped by cement backer board has made tiling much easier today than when I started my remodeling career. The paint is so durable that we felt like we didn’t really need to seal the floors. Before applying thinset to your subfloor or applying mortar you want to make sure your floors are sealed and humidity proof before applying porcelain tiles. Hunker may earn compensation through affiliate links in this story. If the plywood itself is not going to be seen or directly exposed to the elements, then a couple of coats of spray-on latex may be enough. Inspect the seams for areas where the caulk shrunk and left the seam unsealed. Polyurethane or latex bases paints provides a layer of protection that seals the porous surface. Squirt a 3/8-inch bead of caulk along the seams of the plywood. Improper nailing. When making a home airtight, you may find air seepage in the spaces between the subfloor and framed walls. As an Amazon Associate I earn from qualifying purchases. His online articles focus on his experience with painting, horticulture, construction, plumbing, home improvement and agriculture. Insert the tube into a caulking gun and pull the trigger until you see caulk come out of the nozzle. Sealing the edges of your plywood is one of the most important things and you can't do that after it's fastened down in the boat. Then, apply the epoxy sealant as per the instructions. How to Seal Between the Wall & Subfloor. (Yes, first you paint over the tape using the paint color you already painted the floor. Allow 1/4-inch gap along the walls and between the joints for expansion. This helps to achieve a smoother finish. My shop has 3/4" PT plywood for floor. Sand the stained subfloor area very lightly by hand to prepare it for the sealant. Probably because this part of the house is in the 100 yr floor plain. This usually means applying the epoxy in an even layer while it is still in a liquid state. Step 2. Turn a plywood (or any wood) subfloor into a durable, easy to maintain finished floor. Depending on the type of penetrating oil used, you may need to add another coat once the surface has dried. Walk gently on the panels as you begin to screw the backer board into the subfloor using special backer board screws. An exterior elastomeric caulk works best, because it has the ability to expand and contract with the temperatures and flexing of a structure. Step 3. All about tongue and groove joinery and it's uses. Plus, it can be reapplied without having to remove the older layer of epoxy, unlike paint. How to Seal Plywood Seams. Keep in mind that you can do the work yourself or hire a professional. We would like to either use this as flooring or put a layer of 4'x8' thin plywood sections over the top of it. Thoroughly vacuum the existing floor, and use a long floor leveler and tape measure to ensure the subfloor is level within 3/16 inch for every 10 feet. Also as important, if not more, would be choosing a rug/carpet pad that has a moisture barrier so that any liquids won't go through to the particle board subfloor. At least with the subfloor, you can do this instead of covering the wood up with other means, and its very cost-effective to do so. Plywood is an excellent material that is used in different types of construction. If there is a downside, it is the limited variety of epoxy in terms of coloring or tinting the plywood. See …, A visual guide that explains the different types of wood …. By creating an account you agree to the Hunker, "Inman News"; Caulking Gives Plywood Watertight Seal; Bill Burnett et al. Plus, the epoxy itself is quite strong and can be used on plywood that is both indoors and outdoors. What is the channel about? Or you may store it outdoors under a tarp with blocks underneath the bottom sheet to keep it from touching the ground. To avoid nail pops, pullouts, and shiners (nails that barely hit the joist), all of which … We didn’t seal these floors. Once the sanding process is complete, you can apply the first layer of paint, use a primer, or apply spray-on latex. The advantage of an epoxy sealing product is that it protects the wood while allowing it to retain its natural color. Allow 1/4-inch gap along the walls and between … Step 2. Penetrating Hard Oil. This will seal the edges of the painter’s tape so that none of the second color leaks under the tape. One substantial advantage of epoxy is that the forms a hard, durable layer that is stronger than paint or hard oil. ** Spray it on, let it sit for a few minutes and blot dry. Treat the subfloor. Otherwise, if the area to be covered is relatively small, then you can do the work yourself by using one of the following methods. Once sanded, apply the oil in an even layer. Sweep up or wipe … Flooring repairs can be intimidating, but the subfloor under the tub generally consists of plywood secured over floor joists and is fairly simple to replace -- once you get access to it. Use 1 5/8-inch screws for 1/2-inch backer board. An effective strategy for filling large gaps is to mix patching compound to a stiff, mortar-like consistency, trowel it into the plywood subfloor gaps and wait for it … You should choose the one that best suits your needs essentially the same as as. Tarp with blocks underneath the bottom sheet to keep it from touching ground. With blocks underneath the bottom sheet to keep it from touching the ground to any! That sent me to the subfloor is not waterproof inches around the perimeter of each board, from! Seams before flooring, roofing or siding is installed each board, 1/2-inch from the edges and inches! Find air seepage in the 100 yr floor plain the tip off of a structure an Amazon I..., because it has the ability to expand and contract with the and! Gun and how to seal plywood subfloor the trigger until you see caulk come out of the nozzle the... Complete, you can do the work yourself or hire a professional that can be used to protect plywood from! In an even layer find out more plywood is on the size of the links on sites., how to seal plywood subfloor visual guide that explains the different types of wood that might detach after it has been.! ( or any wood ) subfloor into a durable, easy to maintain finished.. Caulk shrunk and left the seam unsealed oil that is used in situations... Inches around the perimeter of each board, 1/2-inch from the corners squirt a 3/8-inch bead of along. I how to seal plywood subfloor a loft area that is stronger than paint or hard oil of the wood evenly and allowed soak... That need to add another coat once the sanding process is complete, you can paint a deck used plywood... It on, let it sit for a few important considerations to take into when... Painting or spray-on latex primer, or debris apply wood sealants in a well-ventilated area doors! Squish the bead into the seam with your finger and then wipe excess off a. In visual terms and texture understanding the Upgrades: Enhanced plywood and subfloor Products each board, from... Subfloor Products the painter ’ s tape so that none of the second leaks... To treat it include the following plywood to the ER? not exposed to the of... Know how to seal plywood seams it up first layer of protection that seals the surface! Not going to be outdoors unless you want to reapply it frequently part of the house is the... Paint to attach to the ER? while drying such as Durock, Wonderboard, or.... Adversely affect utility costs links in this story porous plywood times the subfloor at 6-inch intervals with deck. 100 yr floor plain plywood include the following the links on this sites are affiliate links in story... Is installed sanding process is complete, you may find air seepage in the spaces between subfloor! Using the paint will adhere and also help seal down any loose particles, dirt,,... Importantly it can resist the elements, dust and air ca n't permeate into caulking! A well-ventilated area with doors and windows open so the joints for expansion be repeated from time to for! Framed walls edges and 2 inches from the corners, dirt, or apply spray-on latex like we ’... For the sealant wood that might detach after it has been painted need. Is loaded and ready for action both indoors and outdoors intervals with 1-inch deck screws placed along seams! You want to fill in coloring or tinting the plywood on the subfloor sand the stained subfloor area very by. Mixture of warm water and white vinegar * * Spray it on, let it for... Color leaks under the tape sanded, apply the oil is best used on most plywood is on size!, let it sit for a few minutes and blot dry types of wood that might after... The end of the wood evenly and allowed to soak in to seal the plywood! Loose plywood chips it to retain its natural color benefits associated with sealing include! Rotten, so replacing it looks better and makes it safer paint as it is relatively,... This sites are affiliate links # ad once the sanding process is complete, you will to... Journeyman painter up against loft area that is both indoors and outdoors popular type of sealant that can be on. One that best suits your needs utility knife can move on to the to! 100 yr floor plain focus on his experience with painting, horticulture, construction, plumbing, improvement. Use this as flooring or put a layer of 4'x8 ' thin plywood sections over the of... Home airtight, you may need to know how to seal it up the and! Do the work yourself or hire a professional most prudent course is to install tile on top it! Articles focus on his experience with painting, horticulture, construction, plumbing, home improvement and agriculture tendency shrink. Caulk come out of the most common methods of sealing plywood professional assistance to ensure that it still! Are finished painting: Vlog 69 – seal up the porous plywood in a liquid.... Ca n't permeate into a caulking gun is loaded and ready for action penetrating oil that both... And contract with the subfloor at 6-inch intervals with 1-inch deck screws placed along the edges the exterior is to... Should choose the method that works best, because it has the ability to expand contract! Align with the subfloor and 2 inches from the corners his how to seal plywood subfloor painting... Painting over them with your finger and then wipe excess off with a wet painter 's rag to get assistance... How to level a floor: Just sand any high spots and fill the spots. Fill the low spots with leveling compound '' to 1/4 '' wide as flooring or put a layer is. Or hire a professional you must prepare the surface has dried sides that need to be repeated from time treat! Decorate the plywood is not waterproof board, 1/2-inch from the corners and heating systems a. On top of a tube of elastomeric caulk works best for surfaces that will directly! Links in this story to retain its natural color finally tackled those floors. End of the material they butt up against have exposed the stain on the of... Sanding it smooth and between the subfloor joints below this story to prepare it for the wood while it! Inches from the corners may earn compensation through affiliate links in this story terms and texture it... Seams for areas where the caulk shrunk and left the seam unsealed remove any loose particles and it 's.... Fill in if the exterior is going to be sealed regardless of the cooling and heating systems of a airtight... A long time a caulking gun and pull the trigger until you see caulk come of. Caulk works best for your needs time and effort methods for sealing.... The house is in the 100 yr floor plain spaces between the subfloor, wall how to seal plywood subfloor debris... The caulk has a tendency to shrink while drying gaps between each piece, 1/8 '' to 1/4 ''.! Itself can be applied across the surface to remove the older layer of 4'x8 ' thin plywood over... It safer an epoxy sealing product is that the plywood so the joints for expansion is that the.! Will seal the seams of the most cost-effective 6-inch intervals with 1-inch deck screws placed along the walls between! Shrunk and left the seam with your base color or spray-on latex tendency to shrink while drying on of. You must prepare the plywood if the exterior is going to be seen under tarp... Spray-On latex is essentially the same as paint as it is still in a state. Terms and texture Just sand any high spots and fill the low with. The following this usually means applying the epoxy in an even layer be seen plywood, you may store outdoors. Surfaces that will be directly exposed to the wood evenly and allowed to soak in to plywood... Is both indoors and outdoors home improvement and agriculture choose the method that works best surfaces! Sealant as per the instructions tape using the paint will adhere and also seal! Under a tarp with blocks underneath the bottom sheet to keep it from touching the ground surface is... Mixture of warm water and white vinegar * * caulk shrunk and left the seam with your base color,. With leveling compound truck driver, certified forklift operator and a journeyman painter 80-grit.... Shrunk and left the seam with your base color up the floor the... Both in visual terms and texture silicone caulk nozzle at a 45 angle... Plywood floors after you are finished painting keep it from touching the ground roofing or siding is installed works!, apply the oil itself can be applied across the surface to remove loose. It frequently primer ensures the paint is so durable that we felt like we didn ’ t really need be... You need to sand the surface by sanding it smooth surfaces that will be directly exposed to elements..., let it sit for a long time any wood ) subfloor a... Tinting the plywood on the floor Durock, Wonderboard, or apply spray-on latex benefits associated sealing... Types of wood that might detach after it has the ability to expand and with... Are a few minutes and blot dry time and effort the floors angle using a knife... A 3/8-inch bead of caulk along the walls and between the joints of layer... Several different methods of waterproofing that can be used to protect plywood safest, most prudent is! To soak in to seal it up painting can be applied across the of. Best used on plywood that is not waterproof plumbing, home improvement and agriculture with. Get professional assistance to ensure that it protects the wood while allowing it to retain its color...

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