HardieBacker 3 ft. x 5 ft. x 1/4 in. Cement Backerboard

Yes, it is non-combustible and can be used in fire places.

Use 3/4” if you’re putting it on walls. 1/4” if you’re putting it over a proper existing subfloor . Then put your finished tile surface on it. This cannot be used as a finished surface.

Absolutely not. This is basically concrete and paper pressed into a board. It will not hold up as any type of finished surface. You could, however, use this as a countertop substrate and then adhere tile to it. I would waterproof it though with two coats of redgard.

Hey Dan, No, but it's always a good idea to mesh (2-inch strip) the seams (corners) on the inside of the shower with a waterproofing agent. Personally, I use REDGUARD with the mesh. Good luck, Jim G

Thanks for your question. There are specific areas of the country where this product is rated for outdoor use. They are known as HardieZone HZ10 areas. HZ10 Areas include: Alabama, Arkansas, Florida, Georgia, Louisiana, Mississippi, North Carolina, Oklahoma, South Carolina, Texas. HZ10 also includes portions of: Arizona, California, Nevada, New Mexico, Oregon, Washington. For further details and resources, please refer to the bottom of the Buying Guide located under the Info & Guides section of this page.

Yes, a masonry blade will do just that. BUT, it will create an incredible amount of dust! You must wear a dusk mask and goggles, and cut outside. It is not recommended to cut Hardie board that way, but rather with the Marshalltown scoring knife that has tungsten carbide tips. I can understand your frustration with this slower cutting method, but once you try cutting Hardie board with a masonry blade and see the volume of dust it creates, you might have second thoughts.

I would not recommend using this without some other structure to support it. This is designed to lay on a subfloor and doesn't have enough strength to support standing on. You could probably use it on wall framing but not on the floor by itself. I am able to bend and break the 1/4 board with my hands.

Normally they use what is called a rodent barrier. And then 6 mill visclean on the ground

Absolutely. Just make sure you anchor into the studs. I do this same thing regularly. Good luck and have fun, Jim G

If im understandingthe question correctly you are talking about the inside of the cabinet. the backer is not water proof. Replace it and caulk with silicone