Can you use concrete screws in cement board?

What kind of screws can I use for cement board?

Cement board attached to plywood or similar underlayment will hold with only 1 1/4-inch screws; for thick or heavy metal fixtures, use 1 5/8-inch screws. In general, 1 1/2-inch galvanized nails will hold the board firmly in place.

Do you need special screws for cement board?

Backer-On Rock-On 1-5/8 in. Cement Board Screws are designed for attaching HardieBacker or equivalent fiber cement backerboard to wood or light gauge steel studs. Backer-On Rock-On’s patented serrated head design countersinks for flush seating at any angle, providing a smooth surface for tile.

Can I use normal screws on cement board?

You don’t want to use regular drywall screws for cement boards. They can corrode, they can break down the edges of the boards, and they won’t drive in flush properly. Use ITW’s ROCK-ON and BACKER-ON screws instead.

Can you screw down cement board?

Screw and Joints

Do not use drywall screws as they are not recommended to be used to hold the backer board in place. All of your backer board pieces should be cut before they are placed on​ the floor. … It is important to highlight that screws shall not be installed all the way down to the floor joists.

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Will Hardie board hold a screw?

What type of fastener do you recommend for floor and wall applications of HardieBacker® cement board? In compliance with the tile industry, James Hardie recommends 1-1/4” long galvanized or stainless steel roofing nails (0.121” shank x 3/8” HD) or 1-1/4” long corrosion resistant ribbed waferhead screws (No.

Can I use backer on screws on durock?

Backer-On® cement screws are designed for attaching Hardie-Backer® cement board and Rock-On® cement board screws are designed for attaching Durock® cement board to wood or light gauge steel studs. Patented design and ANSI compliant making these perfect for use in high moisture areas such as bathrooms and kitchen.

Do you have to waterproof cement board?

Contrary to popular thought, tile and grout are not waterproof, and some moisture will penetrate even if sealant is used. … However, if you choose to use concrete backerboard, which is much stronger and more durable than gypsum board, a water vapor membrane must be placed underneath it or a sealant applied on top of it.

Can you use Liquid Nails on cement board?

LN-907 Liquid Nails is recommended for cement board and most other common building materials. The application temperature is from 22 to 120 Fahrenheit and the service temperature is -20 to 140 degrees Fahrenheit. This makes it ideal for just about any DIY project and on most construction projects.

Can I use stainless steel screws on cement board?

If your screws were permanently bombarded with moisture then yes stainless would probably the route to take but if there was that much moisture then tanking would be required.

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Do you need special screws for durock?

Usage: A. DUROCK Wood Screws are used for applying 12.7 mm (1/2) and 15.9 mm (5/8) DUROCK Cement Board to subfloors and counter tops or 12.7 mm (1/2) DUROCK Cement Board to walls or ceilings.

What do you do with a gap between tub and cement board?

Ideally, you would leave a 1/8 inch gap which would then have the sealant applied to it. Either stopping the cement board above the tub flange or alternately shimming it out and dropping it down near the tub would both be good options.

Do you need to use RedGard over cement board?

You really don’t need the RedGard, but the more protection the better…so go for it. And yes, you can do the boards beforehand. But, hit the filled seams & screws (your weak points) as soon as a panel is ready to give it some time to setup. You’ll have to wait for the fills to dry or at least setup anyway.

Do I need Thinset under cement board?

Not only is thinset a critical component underneath cement board but the other critical component is the fasteners. And you won’t have the fasteners if you are trying to install it over concrete.