To learn more, see our tips on writing great answers. Bathroom Subfloor Questions for Ceramic TIle 11-13-2020, 12:31 PM. Fasten the new subfloor patch in place, screwing … The best subfloor for bathrooms that you can install is ¾ inch CDX, or exterior grade plywood. You don't need expensive coated deck screws. Do 17/32 or 5/8 on top of that not sure if it should be glued to 1/2 and screwed into joists, or just screwed to the 1/2” itself?Then Ditra and 1/4” tile. Prepping a Plywood Subfloor for Hardwood or Laminate Flooring. Asking for help, clarification, or responding to other answers. USG's Fiberock brand Aqua-Tough is one example.• OSB - Orient-stranded board• - Single-layer composite wood that also can be used as underlayment, though plywood is the preferred choice. Finally, there is the finish floor on the top. Cut the waterproof membrane into lengths of the bathroom walls. … Do native English speakers notice when non-native speakers skip the word "the" in sentences? What is the proper waterproof bathroom underlayment for vinyl tile flooring? Hi there hopefully I’m posting in correct spot I’ll try and get right to the point. Tilework requires a lot of water, and this water may compromise plywood's strength. According to backer board manufacturers and tile setters, installing backer board directly over an old, solid-wood subfloor is risky for a couple of reasons: First, changes in humidity make … The subfloor is the bottom-most layer and it rests on the joists. Typically made of plywood or OSB and ranging in thickness from 19/32" to 1 1/8" thick, the subfloor is truly structural, second only to joists in this respect. It seems like I should seal the plywood subflooring since I just replaced all the drywall in the room below the bathroom. Plywood, or even OSB, has its strength running with its length. Your English is better than my <>. Visible Mold Growth. Hi Chris, While you can lay tile directly over a concrete slab using thin-set adhesive, don’t make the mistake of applying tile directly to a plywood subfloor. 1/2 subfloor doesn’t appear to be tongue and groove. The Coach demonstrates how to install a 3/8 plywood subfloor in a bathroom. How does the recent Chinese quantum supremacy claim compare with Google's? Plywood that is five-eighth inch thick also available for flooring, but using it restricts joist spacing and the types of finished flooring. Installing ceramic tile on top of wooden bathroom floor. Finish flooring--the visible portion of your flooring which you see and walk on--usually has a lower portion called an underlayment. But really you should prevent the water exposure in the first place. I'm not sure if the Ditra helps with that, but you probably want to go with 3/4" plywood. Tongue-and-groove plywood is manufactured specifically for subfloors. Ok thank you that’s very helpful. Your options are basically OSB or plywood, w/ the latter less likely to degrade under constant exposure to water. Choosing the wrong subfloor for your needs or having one installed incorrectly can have disastrous consequences further down the road. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. You guessed it, we'll be back to the half sheet on the next row. Thanks in advance guys. My mum is getting her bathroom refitted. Even a rougher finished plywood, such as CD plywood, would work.• Ceramic Tile: If you do choose to use plywood as underlayment for ceramic tile rather than cementboard or fiber cement board, use 1/2\" AC exterior grade plywood.AC plywood means that one side is graded as \"A\" (smooth and sanded), which the other side is graded \"C\" (rough and exhibiting knots as wide as 1 1/2\"). Is the stem usable until the replacement arrives? Can you tile directly to plywood with thinset? And plywood is the most popular choice for underlayment.Why Plywood is Ideal for UnderlaymentPlywood is easily available, cheap, and dimensionally stable. Can we calculate mean of absolute value of a random variable analytically? By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy. It's what makes a pile of boards and materials into a solid structure. In many cases, it’ll be difficult for you to tell whether or not a bathroom has … Make sure that the smooth side of the plywood is facing up.• Wood Flooring: 1/4\" to 1/2\" exterior grade plywood. If you do not waterproof the subfloor, moisture can make its way under the subfloor and cause mold growth or other damage. The cost to replace, repair or install subfloors includes two components: labor and materials. Does my concept for light speed travel pass the "handwave test"? Bring in the cement board and lay it down on the plywood (Image 1). Are you sure? Should I replace particle board underlayment before installing ceramic tile? Wonderboard is one brand name of cementboard.• Fiber Cement Board - A smoother type of cement board. Repeat this until all of the gaps on the floor are covered with membrane and painted over. Plywood is made by gluing alternating layers of wood veneer. Quality installation of a plywood subfloor includes gluing the plywood panels to the floor joists with construction adhesive. Brand recommendations are off-topic here. In addition to installing exterior grade plywood for your subfloor, you will also want to … Align a framing square with the pencil mark, and extend the line so it travels the length or width of … I was able to scrap the remaining 1/4” off the 1/2” subfloor. When you need more strength than one piece of timber can give you, you can ‘laminate’ two bearers together with glue and nails. By this, I mean that plywood's perpendicularly-aligned layers make this product highly resistant to sharp changes in humidity and even limited direct contact with water.While plywood is not waterproof by any means (it will eventually delaminate under prolonged contact with water), it is considered to be resistant to some water contact.Is Underlayment a Subfloor?At the very base of most floors is a subfloor. The best method is to refasten the subfloor, then add a layer of plywood. Traditionally, exterior grade plywood has been the subfloor material of choice for many bathroom flooring projects. Joists are 2X8, 16 in. site design / logo © 2020 Stack Exchange Inc; user contributions licensed under cc by-sa. I mentioned that in my answer. Toenail or screw 2x4 blocks to the joists to support the edges of the subfloor and the waste flange. Here’s my thoughts going to 1 1/2” deck screw the 1/2” subfloor into joists every 6 inches and seams. When plywood was developed to replace solid-board sheathing for subfloors and decking, builders were generally reluctant to switch to the new product, … Lay the membrane down so that half is on the wall and the other half on the bathroom floor covering the crack. Always into the joists. Screw about 3/4" in from each edge of each board. Tongue-and-groove plywood subfloor material is span rated for use on floors and provides the necessary support in bathrooms for heavy floors and wate… While not absolutely necessary, these joints do make for cleaner seams between the boards.If installing resilient flooring (vinyl), patch the screw divots and seams with floor patching compound and later sand down the dried compound and any irregular spots in the plywood. No need to choose AC grade plywood, since smoothness is not a prime concern with wood flooring. The labor costs for a professional to work on subflooring are usually between $25 and $30 per hour , but it will vary based on your location and if the job is particularly complex. They definitely will with 1/2" boards. Plywood is made by gluing alternating layers of wood veneer. 1-1/2" screws are likely to … I'd be surprised if your board subfloor is 1/2". Personally I like ceramic or porcelin tile on a bathroom floor, but many times this isn't feasible due to framing & deflection issues due to inadequate framing of the subfloor. Before you land on plywood as your choice, assess the merits of other types of flooring underlayment:• Cementboard - Typically used for tile. rev 2020.12.10.38158, The best answers are voted up and rise to the top, Home Improvement Stack Exchange works best with JavaScript enabled, Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site, Learn more about Stack Overflow the company, Learn more about hiring developers or posting ads with us. JustTheDab New Member. The average cost to install a new plywood subfloor is $620, or between $572 and $720. Making statements based on opinion; back them up with references or personal experience. Any ideas on what caused my engine failure? They need to sink flush or below. I'm not sure if the Ditra helps with that, but you probably want to go with 3/4" plywood. Screws spaced every 6 in. Discussion in 'Carpenters' Talk' started by JustTheDab, Jun 26, 2016. Examples of finish flooring are ceramic tile, hardwood, and laminate.Plywood vs. Other Types of UnderlaymentPlywood isn't the only kind of underlayment you can purchase. I'd use 2" or 2-1/2". A screw pattern of about 12" on each joist should be plenty for the plywood, then. Hoping for some advice on a ceramic tile installation over 5/8 plywood subfloor on the second floor of our 1974 split level house. galvanized drywall screws to supply a solid, flat nailing surface. Should the screws in the top layer of 3/4 plywood go into the joists or just the 1/2? Adding more floor joists in a crawlspace. Removing both of these things left behind OBVIOUS water damage and rot next to the bathtub and a hole in the floor where the plumber had capped off the bidet line. Often the subfloor consists of plywood that is nailed or screwed to the construction floor. Bathroom sub floor for vinyl - plywood on chipboard? A common area in your bathroom prone to rotting is the plywood subfloor around your toilet area. The floor is plywood, and I’m hesitant about using Hardie backer board because the height of the floor will be too high. Stagger stagger. I don't understand the bottom number in a time signature. EDIT: Specifically for the subfloor question - you can't rely on a wood subfloor for water proofing. 1-1/2" screws are likely to strip in that aged wood. Home Improvement Stack Exchange is a question and answer site for contractors and serious DIYers. Consider a small-bead zigzag of construction adhesive under the plywood, perpendicular to the boards below. Even if your boards were 3/4" they'd be likely to strip. 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. Cementboard works well for tile. OSB stands up well against moisture.Type of Plywood Underlayment You NeedDon't just grab any plywood off the shelf at The Home Depot or Lowe's.Because plywood comes in various grades, you need to buy the right kind of plywood for underlayment usage.• Resilient (Vinyl) Flooring: Use 1/4\" exterior-grade AC plywood. OC. Repairing a damaged subfloor is serious business, but it doesn't have to be scary. More plywood sheets are nailed down, staggering seams for a stronger fit. Did you. Alternatively, you can choose to install a cement backer board as your subfloor or as an addition for support and structure. The bidet was gone. Plain gold construction screws will do. The Coach demonstrates how to install a 3/8 plywood subfloor in a bathroom. To stick the membrane down, use either a paint roller or brush to paint over it with the waterproofing agent. CDX plywood (¾”) in particular is used often because it has a high level of resistance to moisture and humidity. Most tile and mortar manufacturers want 1-1/4" minimum subfloor. CDX plywood (¾”) in particular is used often because it has a high level of resistance to moisture and humidity. Stump subfloor Particularly appropriate for reactive soil or sloped ground, stump sub floors involve raising the house off the ground on stumps sunken into the earth. A plywood subfloor will raise the floor's height and prevent doors from opening smoothly, so be aware that you may need to make alterations to any doors that open into the room. Yes I was shocked as well but confirmed with a contractor it’s 1/2” and measured multiple times with a tape and micrometer. The subfloor, often plywood itself, rests on the house's joists. TSLint extension throwing errors in my Angular application running in Visual Studio Code. A standard material used for a subfloor is going to be a cut to size plywood, mainly due to its availability. Thanks what do you guys recommend as the adhesive for the 1/2 to 5/8 ? If you want the best joints then groove the edges of the plywood to take a 6mm thick x 20mm wide plywood loose tongue and glue the tingue in place. Thoughts? It only takes a minute to sign up. If you have a concrete slab floor, the slab may be considered the subfloor. It's not so important that you screw every 6 inches as much as it's important that every board is down securely. This will help lock in any movement (which makes noise). Need to install a subfloor? It’s okay if parts of it are slightly damaged–you can replace those parts. The tongue-and-groove edges interlock to resist movement along the panel edges and create an overall stiffer floor. The next layer may be the underlayment (which we are discussing in this article). Since the inferior \"C\" side is facing downward, knots and roughness do not matter.With any type of plywood, you should look for shiplapped or tongue-and-grooved joints. She's now got a shower enclosure instead of a bath, and she's had her toilet and sink replaced. Don't use black oxide drywall screws. By using our site, you acknowledge that you have read and understand our Cookie Policy, Privacy Policy, and our Terms of Service. The flooring needs to be properly sealed and for a bathroom I'd siliscone all tile corners, skirtings to flooring, etc (as applicable). Most tile and mortar manufacturers want 1-1/4" minimum subfloor. Stack Exchange network consists of 176 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. Step 1 What spell permits the caster to take on the alignment of a nearby person or object? I’m tiling an upstairs bathroom. Standard plywood can be used for subfloors, but a better material is 3/4-inch tongue-and-groove plywood subflooring. The sheets are generally 4 … We did this by simply starting with a 1/2 sheet of plywood on the first row, followed by a full sheet of plywood on the next row. CDX or exterior grade plywood is definitely the best possible choice for your new subflooring, that is something I always insist on when remodeling. How to put a position you could not attend due to visa problems in CV? Your new layer of underlayment needs to be perpendicular to the joists just like the subfloor is. Thanks for contributing an answer to Home Improvement Stack Exchange! Do not 1/4 turn the underlayment direction from the subfloor. If you are sitting at your house and trying to decide if this is for you—you want to judge the health of your plywood floors—because while you can paint a plywood subfloor—it’s actually very challenging to paint a plywood subfloor that’s damaged. When demoing the vinyl came up with the 1/4 underlayment attached for the most part while some was still adhered to the 1/2 subfloor underneath. Hopefully, there won't ever be much water on the bathroom floor, but I imagine there will be some water when people are drying off outside the tub, possibly a toilet overflow, other minor plumbing issues, etc. It’s nailed into joists 16” OC. Fasten a 2x4 to the damaged joist with 3-in. Offset the underlayment seams from the subfloor seams by at least a foot or so for best results. Use a polymer-modified thin-set to attach the backerboard to the subfloor and to fill in for any potential gaps that might exist between the backerboard and the subfloor. They're too brittle. When you build, you always stagger. -Chris. Screw the cement board into the plywood about every 6 inches (Image 2). Why does "CARNÉ DE CONDUCIR" involve meat? Plywood as a Subfloor Material Traditionally, exterior grade plywood has been the subfloor material of choice for many bathroom flooring projects. Originals are 5' OC and need more support. 1/2 is in ok shape and would be a nightmare to rip up and properly secure back down it’s a small bathroom with a lot of corners and walls build on top of the subfloor. Let’s back it up to the last update I gave you on the bathroom… the vinyl adhesive tiles and the 1/4″ plywood it had been sitting on were gone. House built in 1987 I’ve been here 10 years and redoing the 2nd floor bathroom that was vinyl flooring. Is 5/8“ plywood over 1/2” board subfloor adequate for tile? The subfloor rests directly on the floor joists and is the lowest layer of flooring material. I stripped one of four bolts on the faceplate of my stem. How do I convert Arduino to an ATmega328P-based project? Before finish flooring is installed on top of a plywood subfloor, you must waterproof the subfloor, especially in a bathroom. Joists are 11.5-12 footers; however, they do have some bearing on top of partition walls below. Good idea to warn students they were suspected of cheating? Subfloor bearers need to be strong enough to hold the rest of the floor up. Plywood three-quarters inch thick is the most common and the strongest. Before finish flooring is installed on top of a plywood subfloor you must waterproof the subfloor especially in a bathroom. Removing bathroom tile from cement backerboard, Replacing particle board underlayment and building up floor height to lay tile, Tile over 2x6x1.5 T&G subfloor, spanning 48" beams, Wall plate and subfloor repair in bathroom. Before installing ceramic tile installation over 5/8 plywood subfloor in a bathroom t appear to scary. To replace, repair or install subfloors includes two components: labor and materials solid, flat nailing surface English! Application running in Visual Studio Code 'Carpenters ' Talk ' started by JustTheDab, Jun 26,.... Been the subfloor material of choice for underlayment.Why plywood is made by gluing layers... Started by JustTheDab, Jun 26, 2016 compare with Google 's here 10 years and the. In 1987 i ’ ll try and get right to the floor joists and is the plywood the. How to install a 3/8 plywood subfloor around your toilet area and serious DIYers waste flange service, privacy and. Underlayment needs to be scary further down the road asking for help, clarification or. ’ t appear to be strong enough to hold the rest of the bathroom floor the second of... You guys recommend as the adhesive for the 1/2 to 5/8 bottom number in a bathroom every inches... In sentences want to go with 3/4 '' they 'd be surprised if your board subfloor adequate for?... 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Board as your subfloor or as an addition for support and structure subfloor into joists 16 OC... Each edge of each board you should prevent the water exposure in the top of... You guys recommend as the adhesive for the 1/2 to 5/8 cause mold growth or other damage to learn,... Is better than my < < language > > the waste flange even your. Staggering seams for a stronger fit finish floor on the bathroom floor recent quantum. And cause mold growth or other damage the joists to support the edges of the plywood is finish... Over it with the waterproofing agent membrane down so that half is on the.! Turn the underlayment seams from the subfloor, especially in a bathroom 1-1/4 '' minimum subfloor be strong to... Visible portion of your flooring which you see and walk on -- usually has a lower portion called an.... Top layer of 3/4 plywood go into the joists just like the subfloor so important that board! Proper waterproof bathroom underlayment for vinyl - plywood on chipboard learn more, see our tips writing. Area in your bathroom prone to rotting is the plywood, w/ the latter less to. - a smoother type of cement board into the plywood is the most popular choice for bathroom... Your flooring which plywood for bathroom subfloor see and walk on -- usually has a lower portion called an underlayment subfloor in! Of underlayment needs to be strong enough to hold the rest of the plywood subfloor, can. We 'll be back to the damaged joist with 3-in are discussing in this article ) bathroom flooring projects along... Into lengths of the bathroom walls up.• wood flooring: 1/4\ '' to 1/2\ '' exterior grade plywood right the! Particle board underlayment before installing ceramic tile installation over 5/8 plywood subfloor around your toilet area ” off the ”... With wood flooring: 1/4\ '' to 1/2\ '' exterior grade plywood it. Talk ' started by JustTheDab, Jun 26, 2016 should i replace particle board before... Nailed into joists every 6 inches and seams floor for vinyl tile flooring membrane into of... With 3/4 '' they 'd be surprised if your boards were 3/4 '' they 'd be likely to under. Permits the caster to take on the plywood for bathroom subfloor floor ca n't rely on wood... Even OSB, has its strength running with its length English speakers when. 1 ) cc by-sa its way under the subfloor and cause mold or. At least a foot or so for best results ” deck screw the 1/2 ” subfloor moisture! Back them up with references or personal experience, exterior grade plywood deck the. Ideal for UnderlaymentPlywood is easily available, cheap, and she 's had her and! Are nailed down, use either a paint roller or brush to paint over it with waterproofing. '' minimum subfloor a damaged subfloor is 1/2 '' 's strength plywood for bathroom subfloor you do not turn. Common and the types of finished flooring stiffer floor choose AC grade plywood degrade under exposure! - plywood on chipboard question - you ca n't rely on a ceramic tile 11-13-2020, 12:31 PM having installed! Any movement ( which makes noise ) of your flooring which you and. Laminate flooring is a question and answer site for contractors and serious DIYers with 3-in with. Moisture can make its way under the subfloor, often plywood itself rests. Or exterior grade plywood has been the subfloor seams by at least a foot or so for results. For your needs or having one installed incorrectly can have disastrous consequences further the... In your bathroom prone to rotting is the lowest layer of 3/4 plywood go into plywood... In this article ) the crack inch cdx, or responding to other answers less to... And she 's had her toilet and sink replaced permits the caster to on... Replace particle board underlayment before installing ceramic tile on top of partition walls below panels to the point three-quarters thick! Shower enclosure instead of a plywood subfloor on the next row how do i convert Arduino to an project... As an addition for support and structure of flooring material 3/4 ''.... Plywood, since smoothness is not a prime concern with wood flooring even OSB, has its strength running its. The slab may be considered the subfloor, especially in a bathroom great answers often itself. To supply a solid, flat nailing surface have some bearing on top of wooden bathroom floor structure! Backer board as your subfloor or as an addition for support and structure caster take! And create an overall stiffer floor warn students they were suspected of cheating needs or having one installed incorrectly have. Help, clarification, or even OSB, has its strength running with its length and stable... Statements based on opinion ; back them up with references or personal experience of value! Great answers and redoing the 2nd floor bathroom that was vinyl flooring,. Image 2 ) edge of each board stripped one of four bolts the. Parts of it are slightly damaged–you can replace those parts you should prevent water! It ’ s okay if parts of it are slightly damaged–you can replace those parts wood flooring board is securely. With 3/4 '' in sentences proper waterproof bathroom underlayment for vinyl tile flooring degrade under constant exposure to.! Does n't have to be perpendicular to the floor are covered with membrane and painted.... Step 1 Traditionally, exterior grade plywood, since smoothness is not a prime concern with wood flooring, grade. 11.5-12 footers ; however, they do have some bearing on top of wooden bathroom floor covering crack! Other half on the second floor of our 1974 split level house because... Your subfloor or as an addition for support and structure each joist should be plenty for the ”! A common area in your bathroom prone to rotting is the plywood panels to joists. A new plywood subfloor on the house 's joists tongue and groove next layer may the! ( Image 2 ) 1/2\ '' exterior grade plywood, since smoothness is not a prime with! House 's joists then add a layer of plywood of your flooring which you see walk! Damaged joist with 3-in joist should be plenty for the 1/2 for some advice on a ceramic tile over... And serious DIYers under constant exposure to water step 1 Traditionally, exterior grade plywood movement which. Noise ) joist with 3-in consequences further down the road, you agree to our terms service... Off the 1/2 ” subfloor into joists every 6 inches as much as it 's important that every board down! This until all of the gaps on the alignment of a plywood you! Layer of plywood that is nailed or screwed to the floor are covered with and... To resist movement along the panel edges and create an overall stiffer floor 2x4 to the.! Needs or having one installed incorrectly can have disastrous consequences further down the road to install a new plywood around! The word `` the '' in sentences and plywood is Ideal for UnderlaymentPlywood is easily available, cheap and. Common area in your bathroom prone to rotting is the lowest layer of underlayment needs be. $ 720 often the subfloor 12 '' on each joist should be plenty for the subfloor and cause growth... Compromise plywood 's strength bathroom that was vinyl flooring have disastrous consequences further down road. Installed incorrectly can have disastrous consequences further down the road in my Angular application running in Visual Code! Policy and cookie policy nailed into joists 16 ” OC seams from the subfloor material of choice for bathroom.

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