Does Cement Board Need Waterproofing?

Is Cement Board Waterproof, a.k.a. concrete board or wonder-board is a cement primarily based totally product designed as a sheathing cloth for partitions and floors. It’s used as a sub-cloth in the back of tile in a bathe, lavatory or kitchen. Cement board is available in sheets, normally 3’x5′, and is secured to stubs with unique screws.

There’s a not unusualplace false impression that cement board is completely water-proof due to the fact it’s designed for moist regions, however it isn’t. When installed, cement board is water resistant, now no longer water-proof. This manner cement board desires waterproofing. Before you put in any tiles, all of the seams, cracks, screws and corners want to be well sealed and waterproofed. Some developers even propose sealing all of the massive flat regions as well. This make sure no water can penetrate via the cement board and onto the framing that could finally motive rot, mildew, mold and deterioration.

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Cement Board Needs Waterproofing

Cement board is a notable cloth for moist regions due to the fact it’s extraordinarily water resistant. It allows save you mildew and wont go to pot while moist like drywall will. However it nevertheless has a few flaws. Concrete-board is available in sheets which might be screwed to the wall or floor. This manner there are seams among forums and withinside the corners in addition to having plenty of screw penetrations.

Concrete-board makes a high-quality backing cloth for tile due to the fact it’s water resistant and really stiff. And it doesn’t flex an awful lot which makes cracked tiles much less likely. However, all the ones seams, corners and screw holes want to be sealed. Once the cement board is installed, it desires waterproofing.

The distinction among concrete backer-board and water resistant drywall is it’s power and water resistance. Cement-board is an awful lot more potent and tougher which makes it a higher sub cloth. And it’s additionally an awful lot extra water resistant. Cement-board may be submerged in water with out damage, inexperienced drywall can’t.

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The coating on inexperienced drywall is simply at the surface, if water penetrates into the drywall it’s ruined.

When you operate concrete backer-board in a lavatory or kitchen, there are a few very critical steps to follow.

• First, bear in mind the usage of a water-proof/resistant membrane towards the wooden studs earlier than putting in the concrete backer-board to defend the studs from moisture absorbed via the backer-board.
• Fasten the cement-board with authorised screws which might be water-proof and won’t rust.
• Once installed, use a liquid waterproofing sealant like Redgard on all cracks, seams and screw holes. I propose waterproofing all of the massive flat regions so the bathe is absolutely red. If you practice waterproofing correctly, you won’t want the extra membrane below the cement-board.
• Apply as a minimum coats of waterproofing.

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It’s in particular critical to water-proof concrete-board in extraordinarily moist regions like showers. I continually practice as a minimum layer.