Full Answer
Which USG Durock™ membrane should I use for waterproofing?
If waterproofing is desired, use USG Durock™ Brand Waterproofing Membrane or USG Durock™ Brand Liquid Waterproofing Membrane. See USG Durock™ Brand Waterproofing Membrane
Why USG Durock® brand cement board?
For more than 30 years, USG D urock® Brand Cement Board has set the standard for proven performance in the backerboard category. The new USG Durock® Brand Cement Board with EdgeGuard™ offers enhanced, proprietary edge performance and minimizes spin-out and crumbling.
What is the best backer board to use for waterproofing?
If the area behind the backerboard must be kept dry, use RedGard® Waterproofing and Crack Prevention Membrane or Custom® 9240 Waterproofing and Anti-Fracture Membrane” Durock (USG): “If waterproofing is desired, use USG Durock™ Tile Membrane or USG Durock™ Brand Waterproofing Membrane.”
Can you use Durock in a shower?
If you decide to use Durock or other cement products, then use “Hydro ban.” Hydro ban adds an additive into your mix that helps prevent mold and mildew growth within your shower walls. The best method for creating a tiled shower area is first waterproofing with “Weber Membrane #11”.
How should cement board be waterproofed?
What is a moisture barrier?
What happens when you put sheet rock on a shower wall?
Does cement board absorb water?
Can you use plastic behind and a waterproofer?
Can a three wall tub be waterproofed?
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Does Durock cement board need waterproofing?
Water does not affect USG Durock® Brand Cement Board, however, TCNA guidelines recommend the use of a waterproof membrane in wet areas.
Is cement board waterproofing necessary?
You need to apply waterproofing over cement board in wet areas such as a shower. However, in areas that don't get wet you don't need it. Mortar, tile and grout provide some protection against water as well as the cement board itself. It's enough to resist water in areas that don't get that wet like a tiled floor.
How can I make my durock waterproof?
1:223:37How to use USG Durock™ Brand Liquid Waterproofing and Crack ...YouTubeStart of suggested clipEnd of suggested clipApply the first coat at a wet film thickness of 15 to 20 mils. Be sure to overlap all adjoiningMoreApply the first coat at a wet film thickness of 15 to 20 mils. Be sure to overlap all adjoining sections of the membrane by a minimum of two inches.
Is durock moisture resistant?
Durock is a concrete tile backer board that is water and fire resistant. It made up of ground up concrete that is wrapped with fiberglass mesh around it to help hold it together. You can submerge Durock under water and it will not disintegrate or mold.
What happens if you dont waterproof cement board?
Tile and grout are not waterproof Cement board will not fall apart when exposed to water. But like a concrete walkway, it can soak up water. It can also dry out and be perfectly fine.
What happens if cement board gets wet?
Durock and similar cement-based products are designed for uses where it may be exposed to water. It's not waterproof but it will not disintegrate or lose its strength when wet. You should allow it dry thoroughly, however, before using it.
How do you waterproof cement board before tiling?
0:532:20Tile Waterproofing Details for Cement Backer Board - YouTubeYouTubeStart of suggested clipEnd of suggested clipNumber 30 felt paper or house wrap is a fail-safe drainage plane for behind the backer board. MakeMoreNumber 30 felt paper or house wrap is a fail-safe drainage plane for behind the backer board. Make sure to overlap the felt to direct water into the tub not into the wall.
Can you tile directly on cement board?
There is no need to install backer board on a concrete substrate—ceramic tile can be applied right over concrete, provided the surface is flat, smooth, and free of significant cracks.
What can I use to waterproof cement board?
If the area behind the backerboard must be kept dry, use RedGard® Waterproofing and Crack Prevention Membrane or Custom® 9240 Waterproofing and Anti-Fracture Membrane. Durock (USG): If waterproofing is desired, use USG Durock™ Tile Membrane or USG Durock™ Brand Waterproofing Membrane.
Can durock get mold?
Durock or Wonderboard on the other hand, is a mold resistant and was a very durable panel with water blocking aspect. That says performing demolitions on many bathrooms, we have never seen Durock moldy or damaged.
Does durock grow mold?
CGC Durock® Brand Cement Board is moisture and mold-resistant making it the perfect choice for tile and flooring in baths, kitchens and laundry rooms.
Do I need to waterproof shower walls before tiling?
You should waterproof all the shower walls before tiling. A tile backer or cement board is typically not waterproof, albeit many are water-resistant. The most effective and reliable solution is a separate waterproofing membrane on primed shower walls before tiling.
Does Hardie board need to be waterproofed?
Hardiebacker (James Hardie): the use of a waterproof membrane, vapor barrier or vapor. retarding membrane is optional unless the local building code requires it.
Are cement boards waterproof?
Although cement boards are not waterproof, they are water resistant. Consequently, whilst they do not entirely prevent the passage of water, they may be considered for wet environments. Cement boards are heavy sheets and may require two people to install.
Can you tile directly on cement board?
There is no need to install backer board on a concrete substrate—ceramic tile can be applied right over concrete, provided the surface is flat, smooth, and free of significant cracks.
Do you have to waterproof Permabase cement board?
All joints and fastener heads must be treated with waterproofing material to complete the waterproof installation.
How many coats of Durock cement board?
Two coats on rough substrates such as Durock® Brand Cement Board, and for all horizontal applications
How much anti-fracture protection is needed?
Anti-fracture protection up to 1/8 in. (3mm) over shrinkage and other non-structural cracks
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What is USG Durock?
For more than 30 years, USG Durock® Brand Cement Board has set the standard for proven performance in the backerboard category. The new USG Durock® Brand Cement Board with EdgeGuard™ offers enhanced, proprietary edge performance and minimizes spin-out and crumbling. USG Durock® Brand Cement Board with EdgeGuard™ installs quickly and easily, while maintaining the brand’s tradition of quality and reliability.
How to apply latex fortified mortar?
Apply latex-fortified mortar or Type 1 organic adhesive with a notched trowel. Hold trowel at an angle to maintain uniform thickness. Refer to setting material manufacturer for specific information related to trowel type and size.
How far apart should counter tops be?
Fit ends and edges of panels closely but not forced together, maintaining 1/4 in. countertops: fasten with (6 mm). space between panels and perimeter walls. Stagger joints a minimum 16 in. (406 mm) so four corners never meet. Offset panel joints a minimum 8 in. (203 mm) from subfloor joints.
How big should a subfloor be?
Subfloor should be minimum 5/8 in. (16 mm). APA span- rated plywood or OSB with an Exposure 1 classification or better.
How to apply organic adhesive?
Apply Type 1 organic adhesive with 5/32 in. (5 mm) v-notched trowel, latex-fortified mortar with 1/4 in. (6 mm). square-notched trowel. Comb out adhesive or mortar in straight, parallel rows (as shown below) and immediately cover with panel. Adhere panels to subfloor, one panel at a time.
How to hold bottom edge of shower pan off?
Place a 1/4 in. (6 mm) spacer strip or shim around lip of bathtub or shower pan to hold bottom edge of panel off the fixture.
How big is a space fastener?
Space fasteners 8 in. (203 mm) o.c. around the perimeter and in the field of the board.
How should cement board be waterproofed?
How exactly does one go about waterproofing a shower, a tub alcove, or a wet area? In other words, how do you make cement board waterproof?
What is a moisture barrier?
A moisture barrier must be installed to protect the wall cavity for wet area installations. Nail or staple 15 lb roofing felt or 4 mil polyethylene sheeting to the studs… Any shelf, ledge or horizontal surface subjected to water exposure must have a slight downward slope for water runoff. These areas also require proper waterproofing. ~WonderBoard® Lite Backerboard / TDS266 3/29/2018
What happens when you put sheet rock on a shower wall?
The paste/ glue on the tiles has dried out and not longer adhering to the sheet rock. Along the wall where the shower wall meets the tub, all the tiles are coming loose and the sheet rock surface is moldy and its paper peels off and the sheet rock just falls apart.
Does cement board absorb water?
It’s $50 more, but if you’re sensitive to mold, it makes it a lot less likely to have mold. (I’m unfortunately mold sensitive…) With plastic behind the cement board, the cement board still absorbs water, but it just can’t get the water to the studs/etc and wreck the framing of the house.
Can you use plastic behind and a waterproofer?
Also, do not use plastic behind and a surface waterproofer, use one or the other. Using both could theoretically result in a “mold sandwich” because if any got past the surface waterproofer, it wouldn’t be able to evaporate out of the cement boards anymore. Reply. DIYTileGuysays. September 4, 2018 at 12:22 pm.
Can a three wall tub be waterproofed?
Whereas a three wall tub surround could possibly survive with no waterproofing, a shower with a bench and a half wall is almost certainly doomed to failure. Certainly, this is no time to be vague on whether the cement board is waterproof. A waterproof tub alcove using Laticrete Hydroban liquid waterproofing.