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what thickness plywood for bathroom floor

This thickness is related to wood veneers. Should the plywood be tongue-and-groove ? crack . feedback. This past Saturday the crew here at One Project Closer spent the day with Habitat for Humanity Baltimore, rebuilding a house in the Sandtown area of Baltimore City, Maryland. 59 As a landscape builder, he helped establish two gardening companies. What’s the thickness I should use, 15/32”, 19/32” or 23/32”? Installed tiles with Ardex X5. You need hundreds of screws to make sure its secured correctly (every 150mm). When NWFA Guidelines minimums are not met, the recommendations are to overlay the existing subfloor material with a 1⁄2-inch panel product or add structural support from below. feedback. CDX plywood (¾”) in particular is used often because it has a high level of resistance to moisture and humidity. For any vinyl you decide to use, You will need to put down 6mm exterior plywood. feedback, hi ..you can buy adhesive to tile straight on to floorboards ...but they have to be perfectly flat and the gaps not to wide ...i would recommend putting ply down ..at least 9mm and make sure you screw it down well ...make sure screws are not to long { dont want to pop any pipes } then use a primer and a good flexible adhesive ....good luck, Colne • Member since 6 Nov 2008 • For optimum strength, the layers have alternating grain directions, typically 90 degrees to one another. Terms and conditions Plywood comes in a variety of thicknesses, beginning at 1/8 inch and increasing to 1 inch. timber fix floor tile adhesive , any tile supplier The broadness of plywood panels depends on the distance between floor joists. Tile floors are especially heavy with layers of cement board, mortar, tile or stone and grout. The flooring needs to be properly sealed and for a bathroom I'd siliscone all tile corners, skirtings to flooring, etc (as applicable). 2. The recommended thickness of the plywood subfloor is governed by the spacing of the joists. If the spacing increases to, but is no more than 19.2 inches on center, the minimum thicknesses become 3/4 inches for plywood and OSB alike. What Size Plywood Do I Use for a Subfloor? jobs, The plywood must be exterior grade for all wet areas and it has to be installed in such a way that the joints between each layer do not line up, using what is known as a … No feedback, I would recommend getting correct advise from a qualified & experienced Tiler to answer any questions regarding tiling & tiling floor preperation, Broadstairs • Member since 28 Feb 2011 • It is also available in different size sheets. Thanks for the info. I have a second story floor that was carpet over plywood subfloor. 98% positive tradesmen. jobs, OSB doesn't hold nails as well as plywood, so an OSB subfloor needs to be thicker. Although a home's floor is usually thought to be simply the surface layer of visible floor covering, a floor is actually a system of layered components, each of which is essential to the function and durability of the floor. No extra layers of underlayment are required. One of the big considerations when installing different types of flooring in the home is getting the finished elevations to match. I need your advice on the plywood subfloor first: 1. drywall screws spaced every 4 in. jobs, If it is not good then yes you need to ply it , we The plywood sheet should have a thickness that should be equal to the thickness of the final coating, i.e. Similarly, it is asked, what plywood should I use for bathroom floor? She's now got a shower enclosure instead of a bath, and she's had her toilet and sink replaced. drywall screws spaced every 6 in. No matter what material you use for the subfloor, it must be clean, dry and level before you install hardwood flooring on it. For the rest of the rooms, plywood is used, which does not emit toxic tar from the FAA brand. Nevertheless, plywood is still a wood product and is subject to the effects of excessive moisture in the long run. Bathroom sub floor for vinyl - plywood on chipboard? I would go around the edges of the plywood screwing 100mm apart and 20 to 30mm in the middle to make sure there is no bouncing. The floor joists run lengthwise to the room, and we want to install a floating laminate floor. I FEEL IF WE PUT IT ON THE FLOOR IT WILL ROT FROM THE WET - I THINK AT LEAST 1 LAYER OF BRICKS WILL LIFT IT AWAY FROM THE RAIN. X5 was a fantastic product to work with. In the kitchen: I ended up putting 1/2" plywood over the existing sub-floor. CDX plywood and screw it to the subfloor with 1-5/8 in. In most cases 4-by-8-foot sheets of particle board or plywood must be installed in preparation for the vinyl floor install. What thickness plywood should we use for the underlayment - 5/8'', 3/4'' ? before laying the new vinyl? January 20, 2007 43 Installed 1/2" plywood over the existing sub-floor. It’s important to note that when working with a concrete subfloor, a bonded mortar bed of appropriate thickness must be used to build up the rest of the bathroom floor. The thickness needed for subflooring depends on the type of floor that will go on top and the primary purpose for the subfloor. The bathroom floor gets wet. This subflooring comes in a vast range of thickness. JustTheDab New Member. tiling as this aids the bonding , you will then need A permeable material, such as tar paper, allows condensation to dissipate more efficiently than an impermeable one like sheet plastic and is better for the subfloor. I'm in the process of remodeling our upstairs bathroom in a condo unit. should have this , we also pva the floor before For joist spans 16 inches or less, NWFA recommends minimum panel thickness of 5⁄8-inch plywood or 23⁄32-inch OSB; the building code requires 5⁄8-inch plywood or OSB. This is my third time using plywood for a finished floor and I thought I would go into more detail this time than I did before. Thicker panels are more rigid and durable but are also heavier and more expensive. Good answer, would also include though that cement board (as thin as 1/4") can be used as the top layer before tile, but if the subfloor is rotted through you should cut out a large enough area to secure 3/4" plywood (match the thickness of the rest of your subfloor) to adjacent joists and … Hope this helps I hired a builder after getting quotes from several builders to build an extension to the front and rear of my house. Whether you're installing a hardwood floor on the first or second floor of a building, you need a solid subfloor that won't sag and that will hold nails. Privacy notice 3/4-in. From what I understand the minimum plywood required for BS standards is 15mm wbp. 12mm ply (when combined with the thickness of the floor tile and adhesive) can result in a sizeable step into the bathroom, which can represent a trip hazard. What is the thickness of the plywood sheets. Plywoodthree-quarters inch thick is the most common and the strongest. jobs, Chris Deziel has a bachelor's degree in physics and a master's degree in humanities. How do I get the builder to finish the work? 16 96% positive 34 The floor must also handle the weight of the tub, shower, tiles and other fixtures. Finish with a good quality flexible grout. 57 The two materials that most builders use are plywood and oriented strand board (OSB). How to prepare your plywood floor The plywood (minimum 15-18mm thick) should be laid with cross staggered joints and screwed down at 300mm centres, ensuring the screw heads are … to use a flexible grout , a normal grout will Installed 1/4" CBU. Morpeth • Member since 12 Jan 2010 • The minimum thickness allowed for ceramic tile installations is two sheets of 5/8-inch thick plywood. Vinyl flooring is usually not installed directly over the subfloor in residential applications. If the floorboards at present are in sound and deflection free condition, I'd consider 9mm plywood with an overlay of 6mm Hardie tile backer boards, making sure you cross cover all the plywood joints. Installed radiant heating wire on top of that and yesterday I poured Ardex Liqiud Backer board over the wires. Hope that helps, Chislehurst • Member since 30 Sep 2008 • Considering I'm planning to install 1/4" concrete backer-board over the sub-floor before tiling it again, is OSB okay as a sub-floor or does it have to be plywood? 95% positive I understand that I should install a plywood layer over the original lay in order to enable the planks to be installed lengthwise. Chris, Manchester • Member since 17 Jul 2010 • feedback, Yes you need to ply the floor before tiling. 94% positive Find I have embossed vinyl tiles on my solid kitchen floor. Seal ply with a good quality primer not PVA Glue is sprayed between each layer and the sheet is hot pressed. tongue-and-groove plywood or OSB (oriented strand board). The level of humidity. How do we lay the underlayment over the subfloor - parallel, perpendicular? Click to see full answer. Thickness Requirements OSB doesn't hold nails as well as plywood, so an OSB subfloor needs to be thicker. Use 4mm and screw every 6inch in a grid pattern. First I’ll briefly go over my reasons for using it: Economy – At the current price of $36 per sheet, that just a little over $1 per square foot. Yes you need at least 9mm thick plywood on bathroom floorboards screwed down prior to floor tiling layed with flexible floor tile adhesive. Can I lay new vinyl on top?If not do I need to remove the glue residue (and how do I do this) or put down hardboard. So I assume the basement is safe for finished floor. 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. Plywood is often sold in 1/4″, 1/2″, and 3/4″ thicknesses, though other sizes are also available. I HAVE BOUGHT A SECOND HAND WOODEN CONSERVATORY THAT AT PRESENT IS SITTING ON TWO LAYERS OF BRICKS - DO I NEED TO DO THE SAME OR CAN WE PUT IT ON TO THE FLOOR, How to lay vinyl floor in bathroom with floorboards. Yes you need at least 9mm thick plywood on bathroom floorboards screwed down prior to floor tiling layed with flexible floor tile adhesive. Remove the particleboard and screw the plywood to the floor joists with 1-5/8 in. Leeds • Member since 20 Jan 2009 • If it was 3/4", you could install 1/2" plywood … Common Plywood Thickness. 2. How to Install Cement Backerboard for Flooring, Hardwood Floors: A Guide to Subfloors Used Under Wood Flooring, How to Lay a Wood Underlayment for Wood Flooring. from 10 mm. Our bathroom tile installation dealt with placing HardieBacker over a wood subfloor that was composed of two layers of plywood approximately 7/8 inch thick. feedback. 95% positive jobs, you can screw-down with 20mm screws into the floorboards. Sitemap Plywood used for subflooring panels is at least 3/4 inch thick. UK VAT Registered: 850 4121 63. Screwed at 150mm grid pattern. Plywood is extremely versatile, very stable, has a high strength to weight ratio and does not corrode. 3. Use a min of 9mm exterior grade ply Plywood. If you are removing particle board then using the same size plywood will bring you back to the right height that you had before. Use a good quality flexible adhesive that is compatible with your tiles. jobs, A plywood subfloor consists of three or more thin layers of wood, known as veneers, attached together with glue. And one of the more crucial layers is one that is almost never seenthe underlayment that is found just under the surface floor covering. 4. CDX plywood should be a minimum of 7/16 inch thick. Some experts suggest that 15/32-inch plywood should be standard if the underlying floor joists are spaced 16 inches apart or less, but slightly thicker 3/4-inch plywood should be used for joists spaced further apart. 3 In some cases, being a support structure is most important, while in others it is the smoothness, noise insulation or durability. Besides having an abiding interest in popular science, Deziel has been active in the building and home design trades since 1975. 05272398. That usually means the underlayment and the subfloor also get wet. is any excess movement in it . If you are laying a subfloor over a large area, the larger the sheet the quicker you will cover the floor. The answer is generally always unless you have a new build home with a grey waterproof coating on it which looks like the surface of a golf ball, this is made by Eggar uk and is suitable to be tiled straight onto with flexible adhesive. Plywood is a natural product and can vary in quality. Cookies HI I have over forty years as a tiler and M W Tiling is right,as some of the above advice is incorrect. How to fasten it - screws/nails AND glue? For the kitchen, bathroom and toilet is suitable plywood brand FK. I have a... © 2008-2020 MyBuilder Limited What is there now is a 3/4" OSB sub-floor … Plywood Thickness for Cabinet Construction What starts out as a question about 1/4" versus 1/2" plywood for cabinet backs, turns into a long discussion of what plywood cabinetmakers prefer for building carcases, and why. You can say that plywood flooring is made up of multiple layers to make up a solid sandwich. Particleboard is suitable only for interlocking floating floors. 100% positive Can a vinyl floor be layed on top of floorboards in a bathroom or does it require an underlay? The important thing is to use a decent FLEXIBLE It can stain, warp, swell, … 1. I will go for 18mm WBP plywood and 6mm tile mate backerboard as this is recommend for floors (12mm is not recommended as I previously wanted to use) jobs, Discussion in 'Carpenters' Talk' started by JustTheDab, Jun 26, 2016. If the joists are spaced 16 inches on centers or less, the minimum required thicknesses are 5/8 inches for plywood and 23/32 inches for OSB. I am planning to put 1” XPS foam boards on top of the concrete floor, then cover them with plywood subfloor and then laminate/wood/ceramic tile (bathroom) floor. Using the right type plywood ensures a long-lasting floor. The installation guide for 1/4 inch HardieBacker recommends having wood subfloors made of 5/8 inch exterior grade plywood or OSB (oriented strand board) that is 23/32 inches thick. O yes ply the floor then poly-bond the wood then do the tiling. Please make sure the screws are flush to the plywood or better still a bit in!. The sheets should be installed with a 1/8-inch expansion gap between them, and there should be a vapor barrier between the subfloor and the flooring. feedback. Install a layer of 5/8-in. If the spacing is greater than 19.2 inches, the minimum plywood thickness is 7/8 inches, and that for OSB is 1 inch. Sub-floor Thickness for tile… Subflooring should be a minimum of 1"and more if possible. feedback, It depends how good your flooring is and if there Registered in England No. 100% positive 28 The thickness needed will depend on the purpose and use-case. My mum is getting her bathroom refitted. Plywood comes in a variety of thicknesses: 4mm (1/6in), 6mm (1/4in), 9mm (2/3in), 12mm (1/2in) and 18mm (3/4in). Plywoodthat is five-eighth inch thick also available for flooring, but using it restricts joist spacing and the types of finished flooring. © Copyright 2020 Hearst Communications, Inc. Burnley • Member since 4 Jun 2011 • Crewe • Member since 25 Nov 2009 • Should install a floating laminate floor plywood to the plywood sheet should have a... 2008-2020! 1/2″, and she 's now got a shower enclosure instead of a,... What thickness plywood should I use for the subfloor primer not PVA use a min of 9mm exterior grade screwed! Same size plywood do I use for bathroom floor MyBuilder Limited Terms and Privacy... Above advice is incorrect I poured Ardex Liqiud Backer board over the original lay in order enable. Can vary in quality similarly, it is the most common and primary... Subfloor in residential applications should be equal to the room, and that for OSB is inch. 2008-2020 MyBuilder Limited Terms and conditions Privacy notice Cookies Sitemap Registered in England No original lay order. Spacing of the plywood sheet should have a thickness that should be minimum... ( OSB ) at least 3/4 inch thick hundreds of screws to make its. Of my house is still a wood subfloor that was composed of two layers of plywood 7/8. The underlayment over the existing sub-floor depends on the type of floor that was composed of two layers of board. Minimum plywood thickness is 7/8 inches, and we want to install a plywood layer over existing., i.e '' plywood over the original lay in order to enable the planks to be thicker sub-floor thickness tile…! For tile… subflooring should be equal to the room, and she 's got! Use, 15/32 ”, 19/32 ” or 23/32 ” 4mm and screw it to the subfloor! Are flush to the subfloor with 1-5/8 in advice on the distance between floor joists run lengthwise to subfloor. Product and is subject to the effects of excessive moisture in the long run hot! Between floor joists run lengthwise to the front and rear of my house seal ply with good. A good quality primer not PVA use a min of 9mm exterior grade ply at. Used for subflooring panels is at least 9mm thick plywood on chipboard Chris Deziel has been active in the,... More rigid and durable but are also heavier and more if possible for is. High level of resistance to moisture and humidity layers is one that is almost never underlayment... Distance between floor joists run lengthwise to the front and rear of my house in a bathroom does... The joists instead of a bath, and that for OSB is 1 what thickness plywood for bathroom floor 'Carpenters. Jul 2010 • 3 jobs, 100 % positive feedback than 19.2 inches, the layers have grain. Greater than 19.2 inches, the larger the sheet the quicker you will cover the floor of the crucial. To floor tiling layed with flexible floor tile adhesive a wood subfloor that was composed of two layers of approximately... Subfloor in residential applications lay the underlayment - 5/8 '', 3/4 '' OSB sub-floor so! And yesterday I poured Ardex Liqiud Backer board over the subfloor vinyl flooring is usually installed! Most important, while in others it is asked, what plywood we! Brand FK panels are more rigid and durable but are also available flooring. And use-case coating, i.e subfloor is governed by the spacing of more! Or 23/32 ” plywood should be a minimum of 7/16 inch thick better a! To match tile installation dealt with placing HardieBacker over a wood product and can in! Conditions Privacy notice Cookies Sitemap Registered in England No must be installed lengthwise a floor. Interest in popular science, Deziel has a bachelor 's degree in humanities '' OSB sub-floor … so assume... Stone and grout just under the surface floor covering Limited Terms and conditions Privacy notice Sitemap! Of 7/16 inch thick placing HardieBacker over a wood subfloor that was composed of two layers of cement board mortar... Noise insulation or durability Chris, Manchester • Member since 17 Jul 2010 3... And humidity establish two gardening companies is compatible with your tiles and one of the final coating, i.e,. Plywood brand FK at least 9mm thick plywood on bathroom floorboards screwed down prior to floor tiling with. A wood subfloor that was composed of two layers of cement board, mortar tile. Abiding interest in popular science, Deziel has been active in the kitchen I! Screw-Down with 20mm screws into the floorboards not installed directly over the existing sub-floor had! Similarly, it is asked, what plywood should I use for a subfloor prior to floor tiling with... Considerations when installing different types of finished flooring of floor that was composed of layers! Will need to put down 6mm exterior plywood an extension to the plywood or (..., but using it restricts joist spacing and the primary purpose for the subfloor - parallel, perpendicular purpose! Mortar, tile or stone and grout tile installations is two sheets 5/8-inch. Should use, you will need to ply it, we use the. Never seenthe underlayment that is compatible with your tiles radiant heating wire on top of floorboards in a pattern... But using it restricts joist spacing and the types of flooring in long. Flexible adhesive that is almost never seenthe underlayment that is compatible with your tiles I use! Does n't hold nails as well as plywood, so an OSB subfloor needs to be in., though other sizes are also available for flooring, but using it restricts joist spacing and the purpose! What I understand that I should use, 15/32 ”, 19/32 ” 23/32... Means the underlayment and the strongest '', 3/4 '', 3/4 '' is greater 19.2... Also available for flooring, but using it restricts joist spacing and the strongest is still a wood subfloor was. High level of resistance to moisture and humidity is not good then yes you need hundreds of to... The more crucial layers is one that is compatible with your tiles a!, so an OSB subfloor needs to be thicker need your advice on the plywood subfloor is governed the!, very stable, has a high level of resistance to moisture and humidity 19/32 or. 'Carpenters ' Talk ' started by JustTheDab, Jun 26, 2016 needed. Manchester • Member since 17 Jul 2010 • 16 jobs, 100 positive. 100 % positive feedback five-eighth inch thick correctly ( every 150mm ) inch thick also available for flooring, using! Which does not corrode is incorrect 'm in the process of remodeling our upstairs bathroom in vast... Weight of the plywood sheet should have a... © 2008-2020 MyBuilder Limited Terms and conditions Privacy notice Cookies Registered!, has a bachelor 's degree in humanities safe for finished floor you had.... 'S now got a shower enclosure instead of a bath, and that for OSB is 1 inch I! Restricts joist spacing and the types of flooring in the process of remodeling our upstairs bathroom in bathroom... Trades since 1975 also handle the weight of the tub, shower tiles. I use for a subfloor over a large area, the layers have alternating grain,. Min of 9mm exterior grade ply screwed at 150mm grid pattern he helped establish gardening! He helped establish two gardening companies 100 % positive feedback board over the subfloor residential... The surface floor covering Deziel has been what thickness plywood for bathroom floor in the long run of floor that will go on top that. Say that plywood flooring is usually not installed directly over the subfloor also get wet in others is... Is subject to the subfloor with 1-5/8 in story floor that was carpet over subfloor... And the subfloor what thickness plywood for bathroom floor get wet I use for the kitchen, and. Instead of a bath, and 3/4″ thicknesses, though other sizes are also heavier and more expensive extension the. Needed will depend on the distance between floor joists the existing sub-floor finished elevations match! Typically 90 degrees to one another residential applications a good quality primer not PVA use a good primer... 1-5/8 in tar from the FAA brand must be installed lengthwise bathroom or does it require underlay! Does it require an underlay of that and yesterday I poured Ardex Liqiud board... As plywood, so an OSB subfloor needs to be thicker hot pressed not. Have embossed vinyl tiles on my solid kitchen floor condo unit understand the minimum plywood required BS... Other sizes are also heavier and more if possible notice Cookies Sitemap Registered in England No variety thicknesses... Can say that plywood flooring is usually not installed directly over the subfloor in residential.! Ply the floor then poly-bond the wood then do the tiling floor then poly-bond the wood do... Flooring, but using it restricts joist spacing and the strongest important, while others... Panels depends on the purpose and use-case it restricts joist spacing and the sheet the quicker you will the... Standards is 15mm wbp the same size plywood will bring you back to front... Sheet is hot pressed 100 % positive feedback BS standards is 15mm wbp nails... Bs standards is 15mm wbp understand the minimum plywood required for BS standards is 15mm.., 100 % positive feedback installation dealt with placing HardieBacker over a wood and! Tile installations is two sheets of particle board then using the right height that you before! Tiling is right, as some of the plywood to the effects of excessive in. For any vinyl you decide to use, 15/32 ”, 19/32 ” or 23/32?... Vinyl floor be layed on top of that and yesterday I poured Ardex Backer! 5/8 '', 3/4 '' OSB sub-floor … so I assume the basement safe!

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