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The Daily Insight

What screws to use with Hardibacker

Author

Andrew White

Published Mar 30, 2026

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.

What kind of screws do you use for Hardibacker?

Cement Board Screws are designed for attaching HardieBacker or equivalent fiber cement backerboard to wood or light gauge steel studs.

Can I use regular screws on Hardie board?

Therefore, drywall screws or nails will not work for cement boards. The fasteners designed for use with drywall do not feature the corrosion- and alkali-resistant coating that enables the cement board or galvanized fasteners to last.

Do you need special screws for Hardie board?

James Hardie recommends 1-1/4” long galvanized or STAINLESS steel roofing nails or 1-1/4” long ribbed waferhead screws in compliance with the tile industry. It is 8-18 x 3/8” HD.

What size screws Hardibacker?

Minimum 3/4” long ribbed counter sinking corrosion-resistant screws. 18-gauge corrosion-resistant polymer coated 3/4” staples with a 1/4” crown. For HardieBacker 500 cement board, use minimum 1-1/4” long corrosion- resistant roofing nails or ribbed countersinking screws.

Can I use durock screws on Hardibacker?

Designed for use with HardieBacker® Cement Board and USG Durock® Brand Cement Board, the latest screws feature a premium corrosion resistant finish and help prevent moisture buildup in kitchens and bathrooms.

Can I use deck screws for cement board?

I think the screw will care. I don’t install cement board for a living, but from talking with people/professionals who do, the proper screws should be used. You can’t just use any screw or they will corrode in that application, and Ive seen badly corroded screws from using incorrect ones. Definitely not drywall screws.

Can you drill holes in hardiplank?

HardiePlank is available as ready-to-paint or with a color layer. Although the siding does not require drilling pilot holes, you may need to run wire or cable through the siding, necessitating drilling a hole.

Can you install Hardie board siding with screws?

Fiber cement siding can be nailed by hand or with a pneumatic nailer. It can also be attached using corrosion resistant screws. Use hot-dipped galvanized or stainless steel nails. Nails should penetrate through the sheathing and at least 1” into studs.

How do you drill a hole in Hardie board?

It can be cut and drilled just like wood. However, drilling through cement-fiber siding goes better if you use a carbide drill bit, as opposed to a regular steel drill bit. Cement-fiber siding can be drilled while installed on a house or prior to installation.

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What is the difference between backer on and rock on screws?

Rock-On screws are designed for fiber-glass cement boards. Backer-On screws are designed for fiber cement boards.

Can you use stainless steel screws for 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.

Can I use drywall screws for 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.

Which side of Hardibacker do you score?

Place your HardieBacker Cement Board on a flat surface and mark your cuts with a straight edge. 2. Score along your straight edge, applying firm pressure as you go. If you’re using our quarter-inch board, you can score along the provided grid lines.

Does concrete board need special screws?

To attach the cement board to the studs, you’ll need special 1-1/4 in. cement board screws (see Fig. B). These screws have a coating to resist corrosion, a special wide head with cutting flutes and hi-low threads for a strong grip.

Can I use Tapcon screws for cement board?

Tapcon able to fasten material 1-3/4″ – 2-1/4″thick. Tapcon able to fasten material 2-1/4″ – 2-3/4″ thick. … Either length fastener will work to fasten our 2″ thick stud to concrete.

What kind of screws do you need for cement?

Concrete screws come in 3/16- and 1/4-inch diameter, in lengths up to 3-3/4 inches. Both hex-head and Phillips-head styles are available. They can be used in poured concrete, concrete block, and brick. Expect to pay about $15 for a 100-count box of 1¾-inch-long screws.

Can Rock on screws be used with treated lumber?

Rock-On is recommended for ACQ treated wood. Gimlet points starts easily – no predrilling. Serrated thread design provides reduced installation torque and superior holding power.

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.

How do you screw Hardie board?

Use the fastener pattern as a guide. Fasten HardieBacker cement board with specified nails or screws (as listed in “Materials Required”) every 8 in over the entire surface. Keep fasteners between 3/8 in and 3/4 in from board edges and 2 in from board corners.

How do you fasten Hardie board?

Fasten the siding – You can fasten it with a pneumatic nailer or nailing by hand. You can use corrosion-resistant screws, or you can use stainless steel or hot-dipped galvanized nails. You can nail the siding by either blind nailing it at the top or face nailing it at the bottom.

How do you fix a hole in Hardie board?

  1. Sand over the damaged area lightly but thoroughly with a medium-grit sandpaper to smooth any jagged edges and create an easy grip surface for the patch product.
  2. Apply the patch product to the damaged area with the flexible putty knife to fill in any indentations or holes.

How do you cut small holes in Hardie board?

To cut holes in cement backer board to use under tile, equip a portable jigsaw or sabre saw with a metal cutting blade. To start the saw in cement backer board, drill a hole though the backer board large enough for the jigsaw blade or make a plunge cut with the blade in the backer board.

Do you need plywood behind Hardie board?

Fiber cement siding should be installed over plywood, OSB, or sheathing. … Building codes will usually require installing siding over water-resistant barriers and nailed into the studs every 16 or 24 inches.

How many screws do you need for a Hardibacker sheet?

Screw the HardieBacker into the floor, using 1¼-inch backerboard screws and using one screw every 8 inches.

How many screws do I need for a 3x5 durock?

Fasten the DUROCK Brand Cement Board with 1-1/4 hot-dipped galvanized roofing nails or 1-1/4 DUROCK Brand Screws. In both directions, the floor must be at least 1/3.

What size screw should I use for 1/2 drywall?

Choosing the right drywall screw Most common — 1-1/4”: Use 1-1/4” drywall screws to secure 1/2″ drywall installed on wood-stud walls. These coarse-thread screws typically feature phosphate coatings, which better protect against rust compared to zinc coatings.

Do you need a special blade to cut Hardie board?

Cement Board-Cutting Tools For some types of Hardie board, you’ll need a power tool with a cement board blade with a carbide tip to cut the board. Carbide-tipped blades are made specifically for this kind of work. … Once prepared, cut the Hardie board as you would any other material.

Can you stick HardieBacker?

The chosen non-flexible tile adhesive should be applied to the subfloor when the 6mm HardieBacker floor board should be slowly embed into the wet adhesive. The boards are fixed to the subfloor surface with screws and nails installed every 200mm, 15mm apart from the edges of the board and 50mm from its corners.