Is hardibacker waterproof

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HardieBacker sheets are secured directly to wall studs with water resistant green screws called Backer-On. The screws have specially designed threads which can drive through cement board. While the boards themselves are water resistant, the seems, inside corners, edges and screws are vulnerable to water penetration. This means HardieBacker board needs waterproofing. Before you install any tiles, all the seams, cracks, screws, edges and inside corners need to be properly sealed and waterproofed. Most tile installers even recommend sealing all the large flat areas as well. This ensures no water can penetrate through the cement board and onto the framing which helps prevent rot, mold, mildew and deterioration.

Is hardibacker waterproof

Reader question: Hi there. I recently finished grouting my tile surround in my shower. I posted photos on Facebook and somebody questioned whether I had waterproofed the Hardiebacker board. Much to my dismay, I had never even heard of this…. Anyway, I went to the James Hardie website and see nothing about waterproofing being required… In my research, and reading forums, it seems quite evident that it is needed. I am not somebody that skimps out or cuts corners. Furthermore, the last thing a contractor needs is for the whole Facebook community to be criticizing how a shower was constructed. However, after researching the manufacturer instructions for each backer board I find the confusion on the matter is understandable. A waterproof membrane or vapor retarder membrane must be specified to prevent moisture intrusion and protect adjacent building materials. This seems quite clear. Update : Custom Building Products has changed its stand on this since I originally wrote it. Here is the latest:. Consult local building codes. Talk about passing the buck. In fact, they may even be vague on purpose.

If that correct, or is it ok the shower side?

Senior Contributor. User Name Remember Me? Read This]. View First Unread. He said he has to use special membrane tape at edges where each board meets to seal it and in corners. Attached Images.

HardieBacker sheets are secured directly to wall studs with water resistant green screws called Backer-On. The screws have specially designed threads which can drive through cement board. While the boards themselves are water resistant, the seems, inside corners, edges and screws are vulnerable to water penetration. This means HardieBacker board needs waterproofing. Before you install any tiles, all the seams, cracks, screws, edges and inside corners need to be properly sealed and waterproofed. Most tile installers even recommend sealing all the large flat areas as well. This ensures no water can penetrate through the cement board and onto the framing which helps prevent rot, mold, mildew and deterioration. This is ideal for areas like bathrooms and kitchens that have high amounts of moisture and water. However the seams, screws, edges and corners are still vulnerable and need waterproofing before you tile. Simply installing HardieBacker or other cement boards on your shower walls does not make it waterproof.

Is hardibacker waterproof

Reader question: Hi there. I recently finished grouting my tile surround in my shower. I posted photos on Facebook and somebody questioned whether I had waterproofed the Hardiebacker board. Much to my dismay, I had never even heard of this….

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Any one who knows the mortar set shower pan process, takes the floor tile and immerssis it into water for an hour or so before it is actually set into the mortar bed. But the thing that sort of concerns me from the pictures you provided is the way SOME of the bench corners are getting some sort of waterproof treatment, but others are not. User Name Remember Me? As I understand it cement board is not. Apply waterproofing sealant to all the corners and seams first. Large gaps are harder to waterproof with a membrane than tight ones. We are using porcelain tiles to redo the whole shower area. The strength of a concrete backer board vs. We have a rain shower head also with regular drywall on the ceiling. Can water seep through it?

Durock is a cement board reinforced with fiberglass while HardieBacker contains cellulose fiber so it is a fiber-cement board. Durock is lighter per square foot, more durable, more rigid, and less expensive, and can be used on walls, floors, ceilings, and both inside and out. Our aim is to provide you with the information to make the best choices for your project.

Your email address will not be published. You certainly can, but it is not always worth the extra cost and effort because it is extremely heavy. Thank you, Igor! Work the waterproofing into the cracks with your brush and smooth the surface. Once mold spores are inside your home, they grow and thrive on the combination of:. So I dont know what to do. Getting a successful backer or dry partition requires a little more attention and treatment. User Name Remember Me? Posting Rules. I do build for the long haul in all I do. This does not effect the other side which is a cavity that allows the condensation to evaporate. Welcome, Julia. Is there truth to this? Then smooth the surface.