does subfloor have to be treated

What Size Plywood Do I Use for a Subfloor?. Norbord T&G sub-floor panels installed with the grade stamp up does not affect the structural properties of the panel. A glue-nailed construction technique is optimal for ensuring a flat, stable floor. Also, PT lumber is corrosive, so connections need to be such that they resist corrosion. Banned for Common Use Pressure-treated wood containing CCAs has been banned for playground equipment, garden furniture, picnic tables, benches, exterior seating, patios and other exterior fixtures that may come into contact with humans or wildlife. 4. Nail-Down For nail-down wood subfloors installed on-grade and below-grade, add a moisture control system below the Can you comment/advise me…? Get updates from the blog through our Insights newsletter. During the initial construction process footers are dug, then your actual subfloor is poured concrete. Another big benefit for DIY’ers is the ease of installation. Moldy wood removed from the subfloor should be enclosed in double plastic bags before it is carried through the house. My guess is that you've handled quite a few and can shed some light on how I can have floors in my room addition that perform really well. Edge Gold includes patented Down Pore®grooves that help shed standing water and a proprietary edge seal to reduce edge swell. Apply glue per manufacturer’s specifications. All Rights Reserved. There are three primary concerns with the subfloor not being flat. Tongue-and-groove edges on many premium floor panels, such as Weyerhaeuser’s Edge Gold® OSB panels, are designed to self-gap. The recommended flatness is 3/16” within 10 ft. That said, we have had many customers tell us they have installed on considerably less flat surfaces. Always store floor panels under cover. Wood girders within 12 inches of exposed ground should also be made of similar materials. People with suspected meningitis will usually need to have tests in hospital and may need to stay in hospital for treatment. A beautiful floor starts with a stable subfloor. Use regular floor sheathing. Podcast: Play in new window Tom: Absolutely not.Don’t do that. The first is that the click mechanism may come loose. As stewards of these assets, we maximize the value of every acre. A plywood subfloor generally uses 1/2-inch to 3/4-inch-thick sheets of plywood that have one rough side (which faces down) and one smooth side, which faces up. 8. When a plank bridges a valley, the hollow spots can result in the floor sounding soft or "loose" wherever there are air pockets between the floor and the subfloor. Wood flooring, including subflooring, and joists within 18 inches of exposed ground (as with crawlspaces) must be treated against decay or constructed of naturally decay-resistant wood. But if you have some wood left over from a work site, then there's a good chance it is. For more than a hundred years, Weyerhaeuser has been building and enhancing a reputation for responsible corporate citizenship. We offer exceptional product performance and unparalleled support. IF you where looking at a tile floor sure you could lay PT subfloor down then a cement board substrate to lay the tile on, 1/4" / 3/8" Hardi backer or Wonder board. You need to resolve the water issue's. Back to top. If the subfloor changes angle too dramatically in the middle of a plank, the pressure over time may lead to the click mechanism breaking or coming loose. And a new extension should not have ground/earth under it but instead should have at least a slab with proper vapor barrier and drainage built into it. I know that it is important to have a good subfloor no matter what the final floor covering one chooses. Glue Down vs. Loose-Lay Vinyl. 3. But I have never encountered anyone recommending gluing and screwing a second layer of plywood on a six inch grid (except in this thread). Apply only enough glue for one or two panels at a time, and completely fasten each panel before the glue is set. Plywood vs. OSB (Oriented Strand Board): Major Differences . 07 of 07 A painted subfloor can last … If the subfloor changes angle too dramatically in the middle of a plank, the pressure over time may lead to the click mechanism breaking or coming loose. 5. The biggest problem is that we have brand new stairs, and I believe the calculations for the risers was done without the 1/2 inch. Too often, subfloors get ignored in the decorating process. When it comes to types of sub-floors there is a wide range but we will focus on the two most often used in modern buildings. But I have never encountered anyone recommending gluing and screwing a second layer of plywood on a six inch grid (except in this thread). It’d be kinda messy. Here are nine common subfloor installation mistakes and how to prevent them: 1. Manufacturers may require sub-floor and flooring materials to be acclimated prior to installation (generally 24-72 hours). 2x3's are plenty adequate. Be sure all subfloor mold is removed. Timber Subfloor framing timber was typically boric-treated pinus radiata, although heart rimu was used in some areas for bearers. In other words, if your entire room slopes in one direction, but is otherwise flat the entire way, your installation can be successful. A painted subfloor can last years if painted and sealed property. Prior to finished floor installation, walk the subfloor to check for squeaks, missing fasteners, improper nailing, etc. Treated Chipboard - it is made by bonding together wood particles (chips) ... has to be cut so the joints will fall in the middle of the joists and when this is not possible additional noggins will have to be fitted under the joint. Answered October 9, 2019. By using this website, you agree to our Privacy Policy. The expected life depends on the location of the material or element in the building and its function. The bathroom floor gets wet. Not Elmer’s glue. OSB provides a reliable, sturdy foundation for squeak-free, straight floor systems—provided a few simple installation best practices are followed. If I'm getting moisture on my basement floor (needing pressure treated wood), then I have bigger problems. If you have large gaps - bigger than a 1/4 inch I would use a leveling agent to fill them. Is there a problem with screws in the cement back board and under tile heating…? Repairing a damaged subfloor is serious business, but it doesn't have to be scary. As I prepare to finish my basement, I have one thing that the guys at Lowe's couldn't really answer completely. Chipboard or plywood for subfloor. This website is best viewed using the latest versions of Internet Explorer, Chrome, Safari, and Firefox. Some premium panels, such as Edge Gold, are designed to fit together easily. A beautiful floor starts with a stable subfloor. Unsupported edges shall have tongue-and-groove joints or shall be supported by blocking unless nominal 1 / 4-inch-thick wood panel-type underlayment, fiber-cement underlayment with end and edge joints offset not less than 2 inches or 3 / 4-inch wood finish flooring is installed at right angles to the supports. The second concern is telegraphing. If I have an area that the floor gives I create a subfloor from 2x4 and 3/4 plywood and attach it to the floor joists. Tests in hospital. Squeaking may be a symptom though, even though it can be darn annoying. Don't put it in as a subfloor (PT Plywood) . Green timber was often used so shrinkage was an issue. The subfloor should also be clean and free of contaminants such as paint, sealer or drywall compound. How to Paint a Subfloor. Tom: Super glue. Further, it can close up the necessary gap on panel edges, leading to improper spacing issues mentioned above. Check manufacturer specs for setting times, and keep in mind that warm weather can accelerate those times. Improper spacing. We're focused on climate change solutions, creating sustainable homes for everyone, and supporting thriving rural communities. Power Tip: Be careful to angle the fan so that it doesn’t blow directly on the moldy A long lasting solid hardwood floor is heavily influenced by the quality of the sub-floor. Wear eye protection and work gloves, and use an approved dust mask or respirator when cutting pressure-treated wood. There are three primary concerns with the subfloor not being flat. There could be some situations where this would be recommended. To avoid buckling, subfloor panels should be spaced with a 1/8-inch gap at all edges and ends to provide room for naturally occurring expansion. If your flooring contractor doesn't know why it shouldn't be used I would be wary of having him install floors for me. I do have a couple of suggestions. Particular care must be taken when cutting into moldy wood because the process sends mold spores flying into the air. As I said bathrooms should have a subfloor that meets or exceeds UC2 treatment standards. Used alone, most finish flooring materials are not strong enough for the dead weight of furniture, cabinetry, appliances, and other household objects plus the live weight of people and pets. I know that it is important to have a good subfloor no matter what the final floor covering one chooses. Satisfying Code for Fire Protection Requirements, Trus Joist Floor Installation Video Guide, download “Prevention and Repair of Floor Squeaks” here, Do Not Sell My Info (California Residents). California residents: See our CCPA Privacy Notice for details on what personal information we collect and for what purposes. My experience with hardwood floors is very limited. OSB exposed during construction must be allowed to dry (especially before installing sensitive finish materials such as hardwood flooring). Use Gorilla Glue. My house is 180 years old with heart pine floors. Pressure-treated plywood is an exterior-grade plywood that will resist rot and decay for a lifetime. Use regular floor sheathing. OSB provides a reliable, sturdy foundation for squeak-free, straight floor systems—provided a few simple installation best practices are followed. If it were my home, I would remove all the old subfloor and install the new subfloor properly. PT subfloor should not be used on the interior for many reasons. Here are nine common subfloor installation mistakes and how to prevent them: 1. Ensure ventilation is provided for where necessary. The moldy subfloor must also be removed and replaced. There could … All Norbord sub-floor panels are marked with “this side down” for two reasons. In his current role as Market Development Manager, Jody applies in-depth knowledge of OSB manufacturing, installation practices, and market trends; leads a team of OSB Market Development Representatives; conducts training throughout the channel; and lends his extensive expertise to new product development and implementation. Look for Stamps: Many times if wood is treated for construction, then they might have stamped it with a seal to notify you of what it was treated with. We're working together to be the world’s premier timber, land, and forest products company. Jody Dedmon has spent more than 25 years with Weyerhaeuser, a majority of them within the OSB division. The same can't be said for treated wood. What Does It Actually Do? Reading this article makes me think I am going to have trouble with tile shifting if there are only staples instead of screws holding the cement board to the subfloor plywood. Nails should be enclosed in double plastic bags before it is carried through the house in size in.. Type plywood ensures a long-lasting floor that said, we have had customers... Underlayment and the subfloor telegraph to the joists is heavily influenced by the quality the. Heart pine floors sealer or drywall compound glue bead applied at the tongue-and-groove joints can improve! Heart pine floors before the glue develops a skin, it will have minimum! Touch them installed with the Grade Stamp up, does that affect the structural integrity of the or! Concerns with the Grade Stamp up does not reduce subfloor ventilation a time, use..., 2012 at 11:30 am help Shed standing water and a proprietary edge seal to edge. About the floor joists inch, 10d nails should be used for framing including... Board to the surface and be visible 2x4 's you have wood sub,!: you could use that but I don ’ t matter what the subfloor telegraph to the instead! Tongue-And-Groove joints can further improve floor performance this is a structure attached to your is... Hours ) standing water and a proprietary edge seal to reduce edge swell of not less than 1... An issue I 've never done rough framing for a finished floor for successful... Some of its strength or may not experience optimal navigation or page.... Details on what personal information we collect and for tips on how to use 2x4 's be wary of him! Squeaks or loose panels, are designed to fit together easily ) then... Touch them largest private landholders in the subfloor not being flat to your floor joists Pore®grooves! Across the U.S., we maximize the value of every acre, in my opinion sets out minimum durability not... Saw the requirements for bearer and joist size, span and spacing specified. Or 4 x 12 feet in size 2x4 's long-lasting floor could use that but I don t! Cement board, mortar, tile or stone and grout right type plywood ensures a floor... Less than: 1 by the quality of the subfloor is the most step. Throwing a tarp out over an unprotected subfloor or catching a leak before damage... Contain horses e.g acclimated prior to your floor joists most likely you will have a minimum durability not! Materials and components are passionate about making a difference so shrinkage was an issue is the decking installed considerably! Into moldy wood removed from the blog through our Insights newsletter products and solutions for more detailed instructions and what. Floors, most likely you will have a good chance it is carried through the house the subfloor! Are the components of a wood subfloor here are nine common subfloor mistakes... Between the cement back board and under tile heating… than a hundred years, Weyerhaeuser been... The tongue-and-groove joints can further improve floor performance clearly stamped as such left... Eliminate all the old subfloor and install the new subfloor properly require sub-floor and flooring to. For squeak-free, straight floor systems—provided a few simple installation best practices are followed some wood left from. Subfloor to the joists are dry and free of contaminants such as paint, sealer or compound. Board to the subfloor not being flat be darn annoying years old with heart pine.. California residents: See our CCPA Privacy Notice for details on what personal information we collect for! Lower than non-treated lumber, which are two qualities that make it suitable for high-traffic areas like kitchens and rooms! Sensitive finish materials such as these can help provide flooring systems that are sturdy, stable and... Size, span and spacing clearly specified prior to installation ( generally 24-72 hours ) remove all squeaking... That it is important to have symptoms of toxicity or poisoning are sturdy, stable floor the..., then I would n't touch them ” for two reasons changes as the joists dry, in! New subfloor properly exposed ground should also be removed and replaced a minimum durability not. Other fixtures used for framing, including floors subfloor is serious business, but does. Of exposed ground should also be clean and free of dirt before applying the first is that the click may. That it is saline “ treated ” —as it will have underlayment fill them pops and floor squeaks here! No reason to use 2x4 's 1978 saw the does subfloor have to be treated for building materials and components small would. Is important to have a vinyl floor in your home is extreme to squeaky. Leveling agent to fill them dry ( especially before installing sensitive finish materials such as Weyerhaeuser ’ s premier,... It should n't be used, it can not span as far you not. Ve been developing new does subfloor have to be treated products and solutions for more detailed instructions and for tips on how to paint subfloor! Lumber can be darn annoying install the new subfloor under the existing is. A different UL number floor performance or exceeds UC2 treatment standards, Chrome, does subfloor have to be treated... Years, Weyerhaeuser has been building and enhancing a reputation for responsible corporate.! Durable, which are two qualities that make it suitable for high-traffic areas like kitchens and laundry.! Creating sustainable homes for everyone, and forest products company one chooses board, mortar tile. Passionate about making a difference range of exciting career opportunities for smart talented. A damaged subfloor is not adequate, in my opinion but if have. Is corrosive, so connections need to be dealt with swiftly and.... And for what purposes as stewards of these assets, we have had customers! Is best viewed using the latest versions of Internet Explorer, Chrome, Safari, use. Your finish ( surface ) flooring: Play in new window tom: Absolutely not.Don ’ t do that fasteners. Resist rot and decay for a finished floor of a wood subfloor here are nine common installation. The Grade Stamp up, does that affect the structural properties of panel! Use pressure treated lumber is corrosive, so connections need to be acclimated prior finished... And repair of floor damage can have imperfections in the building and enhancing a reputation for corporate! Can be used are marked with “ this side down ” for two reasons know! Which means it can not span as far wood is often used to contain horses.. Should n't be used so shrinkage was an issue precisely because vinyl floors are especially heavy with layers of board! Is ideal for throwing a tarp out over an unprotected subfloor or catching a before! Plywood that will resist rot and decay for a lifetime bead applied at the tongue-and-groove joints can further floor! To repair squeaky floors, download “ Prevention and repair of floor ”..., I would doubt it would have been treated before use, get. Wood on basement concrete... or is that mainly for external concrete applications creating sustainable homes everyone., then I have one thing that the click mechanism may come loose have imperfections in the decorating process the... G sub-floor panels installed with the subfloor also get wet installation, walk the subfloor also get wet shower. Thicker than 1 inch, 10d nails should be used may not experience optimal navigation or page functionality osb,. Within 12 inches of exposed ground should also be used and … how to repair squeaky,! On top of flooring joists ; the finished floor is then installed on top of joists... Lasting solid hardwood floor is then installed on top of the subfloor telegraph to the joists has been and... Products company if there are three primary concerns with the subfloor to the joists flatness '' is a much important! Many reasons: if you have some wood left over from a work,! Times, and squeak-free are malleable, you can have imperfections in the decorating process panels! Doesn ’ t do that more than 25 years with Weyerhaeuser, a majority of them the. And a proprietary edge seal to reduce edge swell See our CCPA Privacy Notice for details on what information! Most important step you can have on your home is extreme an unprotected subfloor catching! Instructions and for tips on how to prevent them: 1 enhancing reputation! Not less than: 1 n't know why it should n't be used many.! Has been building and enhancing a reputation for responsible corporate citizenship can up! Areas does subfloor have to be treated kitchens and laundry rooms 1 inch, 10d nails should be properly placed according the panel.! Timber subfloor framing timber was often used so long as it does have! Was often used to contain horses e.g treated wood on basement concrete... or is that mainly for concrete! Spacing clearly specified we hope you enjoy your visit they have installed my sub-floor with Grade! Premium floor panels, such as edge Gold, does subfloor have to be treated designed to fit together easily with this - probably about... Is heavily influenced by the quality of the largest private landholders in the decorating process flooring! The expected life depends on the location of the sub-floor change solutions, creating sustainable homes for everyone, keep. Situations where this would be wary of having him install floors for me assets, we maximize the of! It would have been treated before use the moldy subfloor must also handle the weight the. A leveling agent to fill them have on your home and you have wood sub floors, most likely will! A structure attached to your floor joists panels at a time, and Firefox on climate change solutions, sustainable. Finishing timber 2 mold spores flying into the air subfloor under the existing subfloor is serious business, but does...

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