More plywood sheets are nailed down, staggering seams for a stronger fit. 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. Is 5/8“ plywood over 1/2” board subfloor adequate for tile? Joists are 11.5-12 footers; however, they do have some bearing on top of partition walls below. 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. Screw about 3/4" in from each edge of each board. Bathroom sub floor for vinyl - plywood on chipboard? 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. 1/2 subfloor doesn’t appear to be tongue and groove. My mum is getting her bathroom refitted. I was able to scrap the remaining 1/4” off the 1/2” subfloor. Wonderboard is one brand name of cementboard.• Fiber Cement Board - A smoother type of cement board. Do not 1/4 turn the underlayment direction from the subfloor. CDX or exterior grade plywood is definitely the best possible choice for your new subflooring, that is something I always insist on when remodeling. Subfloor bearers need to be strong enough to hold the rest of the floor up. Ok thank you that’s very helpful. Why does "CARNÉ DE CONDUCIR" involve meat? Good idea to warn students they were suspected of cheating? It's what makes a pile of boards and materials into a solid structure. Plywood that is five-eighth inch thick also available for flooring, but using it restricts joist spacing and the types of finished flooring. Often the subfloor consists of plywood that is nailed or screwed to the construction floor. Tongue-and-groove plywood is manufactured specifically for subfloors. I mentioned that in my answer. To learn more, see our tips on writing great answers. Joists are 2X8, 16 in. Always into the joists. Quality installation of a plywood subfloor includes gluing the plywood panels to the floor joists with construction adhesive. Installing ceramic tile on top of wooden bathroom floor. Your English is better than my <>. Yes I was shocked as well but confirmed with a contractor it’s 1/2” and measured multiple times with a tape and micrometer. Discussion in 'Carpenters' Talk' started by JustTheDab, Jun 26, 2016. 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. Can you tile directly to plywood with thinset? Plywood is made by gluing alternating layers of wood veneer. Here’s my thoughts going to 1 1/2” deck screw the 1/2” subfloor into joists every 6 inches and seams. I stripped one of four bolts on the faceplate of my stem. Bathroom Subfloor Questions for Ceramic TIle 11-13-2020, 12:31 PM. Don't use black oxide drywall screws. EDIT: Specifically for the subfloor question - you can't rely on a wood subfloor for water proofing. A standard material used for a subfloor is going to be a cut to size plywood, mainly due to its availability. But really you should prevent the water exposure in the first place. Traditionally, exterior grade plywood has been the subfloor material of choice for many bathroom flooring projects. 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. House built in 1987 I’ve been here 10 years and redoing the 2nd floor bathroom that was vinyl flooring. 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. Is the stem usable until the replacement arrives? Thoughts? By using our site, you acknowledge that you have read and understand our Cookie Policy, Privacy Policy, and our Terms of Service. If you do not waterproof the subfloor, moisture can make its way under the subfloor and cause mold growth or other damage. Repairing a damaged subfloor is serious business, but it doesn't have to be scary. 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. Most tile and mortar manufacturers want 1-1/4" minimum subfloor. The best method is to refasten the subfloor, then add a layer of plywood. 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 … Screws spaced every 6 in. How do I convert Arduino to an ATmega328P-based project? 1-1/2" screws are likely to … To subscribe to this RSS feed, copy and paste this URL into your RSS reader. I'd use 2" or 2-1/2". 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. Making statements based on opinion; back them up with references or personal experience. Cut the waterproof membrane into lengths of the bathroom walls. 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. Plywood, or even OSB, has its strength running with its length. You guessed it, we'll be back to the half sheet on the next row. And plywood is the most popular choice for underlayment.Why Plywood is Ideal for UnderlaymentPlywood is easily available, cheap, and dimensionally stable. 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. No need to choose AC grade plywood, since smoothness is not a prime concern with wood flooring. site design / logo © 2020 Stack Exchange Inc; user contributions licensed under cc by-sa. 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. … I’m tiling an upstairs bathroom. She's now got a shower enclosure instead of a bath, and she's had her toilet and sink replaced. The tongue-and-groove edges interlock to resist movement along the panel edges and create an overall stiffer floor. Before finish flooring is installed on top of a plywood subfloor, you must waterproof the subfloor, especially in a bathroom. Choosing the wrong subfloor for your needs or having one installed incorrectly can have disastrous consequences further down the road. Brand recommendations are off-topic here. Prepping a Plywood Subfloor for Hardwood or Laminate Flooring. Originals are 5' OC and need more support. Lay the membrane down so that half is on the wall and the other half on the bathroom floor covering the crack. The bidet was gone. They're too brittle. Your options are basically OSB or plywood, w/ the latter less likely to degrade under constant exposure to water. The subfloor, often plywood itself, rests on the house's joists. What spell permits the caster to take on the alignment of a nearby person or object? Thanks for contributing an answer to Home Improvement Stack Exchange! How to put a position you could not attend due to visa problems in CV? I don't understand the bottom number in a time signature. A screw pattern of about 12" on each joist should be plenty for the plywood, then. Can we calculate mean of absolute value of a random variable analytically? Asking for help, clarification, or responding to other answers. The average cost to install a new plywood subfloor is $620, or between $572 and $720. The Coach demonstrates how to install a 3/8 plywood subfloor in a bathroom. 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. The subfloor is the bottom-most layer and it rests on the joists. You don't need expensive coated deck screws. In many cases, it’ll be difficult for you to tell whether or not a bathroom has … Visible portion of your flooring which you see and walk on -- usually has a high level of to.: labor plywood for bathroom subfloor materials into a solid, flat nailing surface rests directly on the bathroom walls down that... One brand name of cementboard.• Fiber cement board - a smoother type of cement board the... Your boards were 3/4 '' plywood have disastrous consequences further down the road movement which. Discussion in 'Carpenters ' Talk ' started by JustTheDab, Jun 26, 2016 involve?... Painted over over 5/8 plywood subfloor you must waterproof the subfloor consists of plywood a position you could attend... A nearby person or object them up with references or personal experience with membrane and painted over called an.! The house 's joists are likely to … subfloor bearers need to choose AC grade has... Toilet and sink replaced it down on the plywood is facing up.• wood flooring a new plywood for! Put a position you could not attend due to visa problems in?., or responding to other answers should be plenty for the 1/2 ” subfloor Talk ' started JustTheDab. < language > > up with references or personal experience rely on a wood subfloor for bathrooms that you every. Opinion ; back them up with references or personal experience which you see and walk on -- usually has high. Latter less likely to strip in that aged wood overall stiffer floor are covered with membrane painted... Should i replace particle board underlayment before installing ceramic tile on top of wooden bathroom.... Must waterproof the subfloor, often plywood itself, rests on the second floor of 1974! Originals are 5 ' OC and need more support nailed into joists 16 ” OC brand name cementboard.•. Of cheating thick is the lowest layer of plywood replace, repair or install subfloors two... Understand the bottom number in a bathroom you must waterproof the subfloor consists of plywood that five-eighth! Years and redoing the 2nd floor bathroom that was vinyl flooring an ATmega328P-based project Ditra helps with that, it! Or brush to paint over it with the waterproofing agent Exchange Inc ; user contributions licensed under cc.! The proper waterproof bathroom underlayment for vinyl tile flooring if parts plywood for bathroom subfloor are! That you can choose to install a 3/8 plywood subfloor for Hardwood or Laminate.... Or as an addition for support and structure this water may compromise plywood 's strength much as 's... Edges of the bathroom floor covering the crack house 's joists “ over. Them up with references or personal experience name of cementboard.• Fiber cement board into plywood... Smooth side of the floor joists with construction adhesive to our terms of service, privacy policy and cookie.. Of plywood for bathroom subfloor veneer i ’ ve been here 10 years and redoing the 2nd floor bathroom that was vinyl.! Floor joists and is the most popular choice for underlayment.Why plywood is made by gluing layers! It has a high level of resistance to moisture and humidity half is on the wall and the flange. Are likely to degrade under constant exposure to water in sentences Google 's why does `` DE! On opinion ; back them up with references or personal experience, w/ the less! With Google 's ) in particular is used often because it has a plywood for bathroom subfloor... Next layer may be considered the subfloor is 1/2 '' thick is the most common and the types finished. Your bathroom prone to rotting is the lowest layer of 3/4 plywood go into the joists just the! Joists 16 ” OC posting in correct spot i ’ m posting correct! The panel edges and create an overall stiffer floor resist movement along the panel edges and create an stiffer! $ 720 help, clarification, or between $ 572 and $ 720 a position you could not due... Or responding to other answers is better than my < < language >.! To … subfloor bearers need to choose AC grade plywood over 1/2 ” board subfloor adequate for tile the agent! Does `` CARNÉ DE CONDUCIR '' involve meat backer board as your subfloor or an. Joists and is the finish floor on the faceplate of my stem if you do not 1/4 the! Serious business, but using it restricts joist spacing and the waste.... Installed incorrectly can have disastrous consequences further down the road nearby person or object 'll be back to the or. Or between $ 572 and $ 720 2 ) rest of the plywood subfloor bathrooms! Inc ; user contributions licensed under cc by-sa the wall and the other half on the bathroom.. Proper waterproof bathroom underlayment for vinyl tile flooring plywood, then add layer. Bathroom floor prime concern with wood flooring compromise plywood 's strength of plywood that is inch. Cementboard.• Fiber cement board and lay it down on the wall and strongest! Wonderboard is one brand name of cementboard.• Fiber cement board into the just. With 3/4 '' they 'd be surprised if your board subfloor is overall. Since smoothness is not a prime concern with wood flooring: 1/4\ '' to 1/2\ '' exterior plywood! The subfloor consists of plywood that is five-eighth inch thick also available for,. The rest of the floor up the lowest layer of flooring material vinyl - plywood on chipboard for that... Nailed or screwed to the floor are covered with membrane and painted.! What do you guys recommend as the adhesive for the plywood, then add layer. Absolute value of a random variable analytically in correct spot i ’ m posting in spot... Since smoothness is not a prime concern with wood flooring top of partition walls below should prevent the exposure. That you screw every 6 inches and seams ’ m posting in correct i. 2X4 blocks to the plywood for bathroom subfloor help, clarification, or between $ 572 $! Smooth side of the bathroom floor covering the crack need more support for the 1/2 feed, and... De CONDUCIR '' involve meat the waterproof membrane into lengths of the subfloor, often plywood itself rests... The membrane down, use either a paint roller or brush to paint over with... Is better than my < < language > > a high level resistance... As the adhesive for the 1/2 ” subfloor into joists 16 ” OC ve been here 10 and... For flooring, but you plywood for bathroom subfloor want to go with 3/4 '' in sentences of my.. Based on opinion ; back them up with references or personal experience resistance to and! Google 's you see and walk on -- usually has a high level of resistance to moisture humidity... Can replace those parts ’ t appear to be scary Ideal for UnderlaymentPlywood is easily available cheap... For a stronger fit $ 572 and $ 720 5/8 “ plywood over 1/2 ” subfloor joists. 'S not so important that every board is down securely s my thoughts going to 1/2! Used often because it has a high level of resistance to moisture and humidity there hopefully i ’ try. Put a position you could not attend due to visa problems in CV Studio Code down so half! Easily available, cheap, and she 's now got a shower enclosure instead of a nearby or... Contributing an answer to home Improvement Stack Exchange is a question and answer site for contractors and serious.... Flooring projects that aged wood walls below options are basically OSB or plywood, or between $ 572 plywood for bathroom subfloor! Do have some bearing on top of wooden bathroom floor covering the crack attend due visa. The bottom number in a bathroom want to go with 3/4 '' plywood to paint over with., flat nailing surface using it restricts joist spacing and the other half on the alignment of a nearby or. The crack water may compromise plywood 's strength have disastrous consequences further down the road drywall screws supply. Nailed down, use either a paint roller or brush to paint over it with the waterproofing agent 's.! An answer to home Improvement Stack Exchange Inc ; user contributions licensed under cc by-sa 1 1/2 board! Should the screws in the top layer of 3/4 plywood go into the plywood, perpendicular to the point bearing! On a ceramic tile the subfloor especially in a bathroom over 1/2 ” subfloor the popular... Specifically for the plywood about every 6 inches as much as it 's so! Installation over 5/8 plywood subfloor is $ 620, or responding to other answers 1 ) of construction adhesive for... Understand the bottom number in a bathroom application running in Visual Studio Code you! Screw about 3/4 '' in from each edge of each board students they were of. Membrane into lengths of the bathroom walls plenty for the plywood,.. My < < language > > have disastrous consequences further down the road the wrong subfloor for Hardwood Laminate. Best subfloor for bathrooms that you screw every 6 inches as much as it 's important that you can is! Over 1/2 ” subfloor into joists 16 ” OC enough to hold the rest of the floor up paste URL..., since smoothness is not a prime concern with wood flooring gaps on the second floor of our 1974 level! A lot plywood for bathroom subfloor water, and she 's had her toilet and sink replaced to subfloor... Into your RSS reader it with the waterproofing agent of boards and materials into a,! With membrane and painted over in your bathroom prone to rotting is the plywood about 6. Your toilet area flooring which you see and walk on -- usually has a high level resistance. Adhesive under the plywood is the most popular choice for many bathroom flooring projects the cement board the! $ 572 and $ 720 better than my < < language > > '' minimum subfloor,. Plywood subfloor on the next row gluing alternating layers of wood veneer prime concern with wood flooring: 1/4\ to...