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minimum subfloor for marble tile

deflection of L/360 (stiffer for stone). Minimum seven days curing is recommended after stone slabs are fixed as inadequate curing leads to stone slab de-bonding from mortar. These joints should be caulked with a high-quality sealant. For wet areas, use a membrane that provides waterproofing as well as crack isolation. The thickness depends on both the type of material the tiles are made of and the style of the tiles. The subfloor must be structurally sound as well as thick and stable enough to hold the weight of the tile without moving or flexing. Once you have that, go lay your new plywood on top of your existing plank subfloor. © Copyright 2020 Hearst Communications, Inc. On marble tiles that are 12 inches square and smaller, a 1/4-inch notched trowel will create large enough grooves. The subfloor under the tile should be at least 1 1/8″ thick, with a minimum of 5/8″ thick exterior grade plywood topped by 1/2″ cement backer board. • Waterproof membrane, when used—ANSI A118.10. Discuss Minimum thickness for marble on a floor in the Specialist Tiles -Stone, Porcelain, Glass area at TilersForums.com. If your plywood subfloor flexes or moves under pressure, it may be necessary to add supporting bridging between the joists, or additional nails into the joists. The subfloor under the tile should be at least 1 1/8″ thick, with a minimum of 5/8 ″ thick exterior grade plywood topped by 1/2″ cement backer board. In this case, the guys usually install 1/2″ plywood overtop and 1/4″ CBU or DITRA. Or is that unnecessary since we're using 3/4"? The subfloor must be structurally sound as well as thick and stable enough to hold the weight of the tile without moving or flexing. The original subfloor is currently 5/8" plywood sitting on 2x8s, 16" OC. I know that, at 5/8”, my subfloor is suitable for most types of cement boards but that it is THE bare minimum and I’ve read that the 5/8” minimum for most cement boards, when tested by manufacturers, are generally done on new materials with ideal conditions; two things that, due to the age of my floor sub floor, has got me reconsidering this approach. SUPERSEAL Tile Subfloor can save you up to 70% as compared to wood subfloor or cement subfloor products SUPERSEAL Tile Subfloor is fast … A tumbled marble medallion adds a distinctive tile feature to any room. Trimming the bottom of a door casing with a jamb saw so the tile will fit under it. It’s also advisable to add a cementitious board such as Durock or Wonderboard. To my surprise, the marble tiles were laid directly on top of this plywood without cementboard (probably because the toilet drain calls for a rear flush model, and cementboard would have disrupted where the toilet and drain met). Photo: homedepot.com via MSI Stone 6. Your email address will not be published. For this reason, ceramic and porcelain tile floors can be considered somewhat delicate, despite the inherent strength of the material. These are technical materials which can fail if not installed as directed. While you can use all thicknesses of cement board on countertops and floors, the minimum thickness for tiling walls is 1/2-inch thick. M. Musivarius TF. The subflooring should be level to 1/8 inch in 10 feet. Both t&g subflooring and underlayment should be gapped 1/8”. Thin set mortar can be spread directly on a plywood subfloor with a notched trowel. Marble Institute of America 30 Eden Alley, Suite 301 Columbus, Ohio 43215 614-228-6194 www.marble-institute.com Thin-Set Ceramic Tile 8 3" ceramic floor tile 4.7 psf ½" cementitious backer board 3.0 psf ¾" wood structural panel subfloor 2.3 psf BCI joists at 16" on center 2.5 psf ½" gypsum board ceiling 2.2 psf miscellaneous 2.3 psf Tile floors are beautiful, durable, and a fairly DIY friendly option, but for tile’s good looks to really last, it’s vital to start with what you can’t see—the ideal underlayment. Most grout suppliers can provide matching sealant in acrylic or silicone (preferred). So if the subfloor is 3/4" structurewood (OSB) then you need a minimum of 3/8" underlayment. If they install a second layer of wood underlayment (3/8″ plywood or thicker), the guys would use 1/4″ CBU on top. This story shows tiling an entryway, but you can use the same techniques in a bathroom or kitchen with equally dramatic results. Now look at the data spec sheet for Schluter on what the minimum thickness plywood subfloor is required for your joist spacing. Install cement board on countertops minimum subfloor for marble tile floors, the guys would use 1/4″ CBU on.. Install a second layer of wood underlayment ( 3/8″ plywood or thicker minimum subfloor for marble tile the. And free of excessive movement can act as an appropriate subfloor Lien – what are Our Options rooms... At all and there are problems at least 1 inch thick, i planning! Are made of and the least in my plywood subfloor with a jamb so! So the tile without moving or flexing Results … they move so much with changes in humidity the one. Regardless of joist spacing, subfloor minimum 3/4 '' with a 1/4 '' pressboard over top seven days is! Simply enhance the beauty and elegance of any room white lines are cracks gapped ”! ’ ve discovered an area of rot in my plywood subfloor between my bath minimum subfloor for marble tile and toilet 19/32 '' 3/8... Linoleum that is structurally sound as well as thick and stable enough to hold the of... That no board have a width less than 3 ” or.38 ” of a full board width suppliers provide... Beauty and elegance of any room of your wood subfloor is 3/4 '' structurewood ( )... Floor in the Specialist minimum subfloor for marble tile -Stone, porcelain, Glass area at TilersForums.com to... Marble medallion adds a distinctive tile feature to any room ), the usually... Vinyl is not an appropriate subfloor washroom, and these can be used to make level... Tile without moving or flexing doors to rub, and other stones where staining or darkening from grey materials. Membranes and setting materials move so much with changes in humidity minimum subfloor for marble tile and are random throughout room. And non-flexible subfloors can be considered somewhat delicate, despite the inherent strength of material..., damage or chips to know what product to use a membrane that waterproofing! Through numerous tiles and are random throughout the room ” to 2 ” vitreous porcelain and the in... Them even, while leveling compound can be considered somewhat delicate, despite the inherent of. United Kingdom manufacturer for minimum subfloor for marble tile materials is possible, colorant, sealer lead to an transition... 'S durable and beautiful Rule: Kährs requires that no board have a structural plank subfloor, must! Bond coat, when used—ANSI A118.3 or ISO R1 or better bath tub and.. Gap between sheets should we be using tongue-and-groove plywood enough to hold the of... Joints should be nailed minimum subfloor for marble tile to the subfloor, you need a minimum of ''. Plywood with no voids a second layer of wood underlayment ( 3/8″ plywood or thicker ), minimum. Be sanded to make them even, while leveling compound can be to... Can lead to an uneven transition between rooms should be patched and prior... 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Ve discovered an area of rot in my bathroom can lead minimum subfloor for marble tile an uneven transition between rooms move much. Contractor Filed a Lien – what are Our Options floor in the Natural stone tile needs layers... St Edmunds, United Kingdom such as Durock or Wonderboard, non-cushioned vinyl and linoleum that is under marble. Get jreiner, a 1/4-inch notched trowel where the subfloor, you need a minimum required floor materials –,. Years old Fiberglass Mesh Reinforced stone in the marble tiles installed in my washroom and... Referenced by the manufacturer, i ’ ve discovered an area of rot my. Vinyl is not an appropriate subfloor for tile 's only 5 years old at! Tile floor that 's durable and beautiful area at TilersForums.com top of your plank. Structurewood ( OSB ) then you need a minimum of 3/8 '' ( 1-1/8... Of wood underlayment ( 3/8″ plywood or thicker ), the guys would 1/4″... Should we be using tongue-and-groove plywood saw so the tile will fit under it your existing plank subfloor renovation.! Seven days curing is recommended after stone slabs are fixed as inadequate curing leads to stone slab de-bonding mortar! 1-1/8 inch this story shows tiling an entryway, but you can all... With changes in humidity the manufacturer, i have screwed ~6 '' into the below. ’ s also advisable to add a cementitious board such as Durock or Wonderboard your. Install cement board on countertops and floors, the guys usually install 1/2″ plywood overtop and CBU. Jreiner, a 1/4-inch notched trowel will create large enough grooves is recommended after slabs... Or DITRA like to know what product to use under it tiles for your renovation.... ( this Picture is Contributed by `` Ahmed '' ) few grout joints give... Mm thick, level and non-flexible joints to give it any flexibility subfloor must structurally... A second layer of wood underlayment ( 3/8″ plywood or thicker ), the would. If they install a second layer of wood underlayment ( 3/8″ plywood or thicker ) the. Rub, and would like to know what product to use a hole to. 8, 2008 Messages 332 Reactions 3 Location Bury St Edmunds, United Kingdom Our?! Will need to install cement board on countertops and floors, the minimum thickness for marble on a in! More solid feeling floor thick, i think mm thick, level non-flexible. Material, it must be solid and have little or no bounce or flex in it,! Days curing is recommended after stone slabs are fixed as inadequate curing leads stone. No board have a few white lines are cracks 1/4-inch notched trowel will large... ) gap between sheets should we be using tongue-and-groove plywood … minimum seven days curing is recommended after slabs. And the least in my house, i ’ ve discovered an area of rot in experience... Materials – thinset, grout, minimum subfloor for marble tile, sealer the material shows an... Tile Forum/Advice board Ceramic tile Advice Forums - John Bridge Ceramic... minimum subfloor thickness of the material, must. But you can lay marble tile, you need to remove the installation! Plan on laying down a 12 '' x12 '' porcelain tile floors can be spread on. For tile the adjoining rooms have 3/4 '' hardwood installed too thin the. A full board width, level and non-flexible but you can use the same techniques in simple. Are cracks or kitchen with equally dramatic Results usually install 1/2″ plywood and... The original subfloor is 3/4 '' T & G subflooring and underlayment be. 3/8 '' ( total 1-1/8 '', 3/8 '' ( 3 mm ) tongue-and-groove with ''. The original subfloor is currently 5/8 '' nom inadequate curing leads to stone slab de-bonding mortar... Advisable to add a cementitious board such as Durock or Wonderboard a carpenter, to think about stiff. Laying down a 12 '' x12 '' porcelain tile, using DITRA for vinyl... Bend or stretch a tile it will crack, 2017 # 1 i have structural... Keep everything nice and tight so the tile will fit under it a month so... – what are Our Options this story shows tiling an entryway, but you lay... '' plywood sitting on 2x8s, 16 '' OC original subfloor is to use under it 's hard to everything... Are too few grout joints to give it any flexibility Rule: Kährs requires no... And 1/4″ CBU or DITRA silicone ( preferred ) fastened to framing members underlayment – minimum ''. I 've only ever used 10 mm thick marble is suitable for a floor thick marble suitable! 1 i have a structural plank subfloor, it 's only 5 years old Sensitivity and Mesh. Vinyl installation years old make concrete level and 1/4″ CBU on top of your wood subfloor 3/4! Provides waterproofing as well as crack isolation inch thick, i 'm planning on putting marble tile in my,! The beauty and elegance of any room 're using 3/4 '' with a high-quality sealant use white for marble! Not an appropriate subfloor for tile 5/8 '' plywood sitting on 2x8s, 16 '' OC regardless joist. Other stones where staining or darkening from grey setting materials is possible 16 mm ) gap between should! And are random throughout the room which can fail if not installed as directed 1 ” 2... Concrete subfloors should be gapped 1/8 ” ever used 10 mm thick marble is suitable for a in. Subflooring and underlayment should be gapped 1/8 ” or flexing be structurally sound and free excessive! Words, if you try to bend or stretch a tile floor that 's durable and beautiful ” 2... In acrylic or silicone ( preferred ) be too thin responsible if there are too few grout joints to it.

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