What do you put under Hardieboard?

Either is acceptable, but we recommend that the smooth side with the nailing pattern of every 8" on center go up. What subfloor should HardieBacker® cement board be installed over? The minimum subfloor specified is 5/8" exterior grade plywood or 23/32'' exterior grade OSB subflooring.

Do you have to put Thinset under Hardibacker?

The installation manual for HardieBacker suggests to embed it in thin-set and it should be installed over plywood. Thus I would suggest removing the current wood planks flooring, install a 3/4" outdoor grade plywood, thinset and then your HardieBacker (screwed down).

Do you put anything under cement board?

Thinset is going to create a solid surface under tile and prevent flexing that could lead to cracking. Using thinset between the backerboard and subfloor will create additional strength, fill in any potential gaps that exist and lessen the possibility of movement.

What goes behind Hardie siding?

Joint flashing: James Hardie recommends that a slip sheet (joint flashing) is installed behind each butt joint in the siding. This is a 6” wide piece of weather resistive material to make sure that no water gets through.

Do you need OSB under Hardie board?

GENERAL REQUIREMENTS: HardiePlank® lap siding can be installed over braced wood or steel studs spaced a maximum of 24" o.c. or directly to minimum 7/16" thick OSB sheathing. See General Fastening Requirements.

HardiePlank Siding, Installing Fiber Cement Planks on Exterior Walls Vid #10

Do I need plywood under Hardie siding?

Fiber cement siding should be installed over plywood, OSB, or sheathing. Be sure that the siding installed is dry. Otherwise, it might shrink at butt joints.

Should there be plywood under siding?

The wood that goes under residential siding – exterior sheathing – performs several functions. It adds insulation, waterproofing and structural support for the framing. It also provides a surface on which to nail the siding. The most common sheathing materials include oriented strand board and plywood.

Does Hardie board need a moisture barrier?

Depending on your local building authority having jurisdiction (the AHJ) over your building codes, vapor barriers are almost always required, whether your builder uses James Hardie products or some other, inferior product.

Does Hardie board need to be pre drilled?

Nailing Basics

Fiberboard cement siding can be hand-nailed, but because it's so much harder and more brittle than wood, you have to predrill holes near any edge. You can save yourself a bunch of time by using a pneumatic coil siding nail gun.

Should I put 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.

What kind of thinset do you use for Hardibacker?

An unmodified thinset (Masterblend) is fine between the Hardi and the subfloor. Tara, The reason for the layer of thinset between the cement board and the subfloor is to fill the voids/gaps between the two. It'll keep the cement board from moving up and down.

Should you put mortar under Backerboard?

Use thin-set mortar when installing cement backer board. Thin-set dries slowly, allowing you to fix and readjust backer board sheets as needed. The ingredients in thin-set mortar ingredients are cement, fine sand and a water retaining agent.

Can you put Hardie board over plywood?

Use minimum 1/2 in exterior grade plywood or equivalent, positioned across the wood cabinet. Space between plywood supports is not to exceed 16 in on center. Do not align HardieBacker cement board joints with plywood joints.

Do you nail or screw Hardie board?

Fasten HardieBacker sheets with proper nails or screws (as listed in ''Materials Required'' in the backer installation instructions) every 8'' around the perimeter and all supporting studs. Keep fasteners between 3/8'' and 3/4'' from sheet edges and 2'' in from sheet corners.

How do you mount Hardie board?

The best way to attach to Hardie Plank siding is by using nails or screws. To avoid cracking the siding, pilot drill the siding first, using drill bit a little smaller than the nail or screw. And to make the sure the hole you are forming doesn't leak, caulk the hole before driving in the fastener.

How do you secure Hardie siding?

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.

Do I need plastic behind Hardie board?

plastic behind cement board with waterproofing is essentially suspenders when you already have a belt. the waterproofing is also a vapor retarder so if the red guard or kerdi product is continuous, lapping corners and all, the plastic will be unnecessary.

Do you need waterproof membrane on cement board?

First, you should provide a waterproof/resistant membrane against the wood studs before installing the concrete backer-board to protect the wood studs from moisture absorbed through the backer-board.

Can cement board be attached directly to studs?

Walls: For highly wet areas, such as showers and bathtub surrounds, cement board typically is attached directly over the wall studs, although the studs may be covered with an intervening moisture membrane. (Some cement board products may not require the underlying membrane if the seams are properly waterproofed.)

Do you have to use Tyvek under siding?

There is no logical reason not to have house wrap under vinyl siding, and many authorities strongly agree that it should be viewed as mandatory, even if your local building codes don't necessarily require it. Vinyl siding is one of, if not the most popular exterior cladding for residential homes.

What material is under siding?

Underlayment

Underlayment or weather resistive barrier (WRB) is installed between the siding and the sheathing. This can be tar paper or a house wrap such as HardieWrap® or Tyvek HomeWrap®. HardieWrap® is great for keeping water out and at the same time letting water vapor escape from the house.

Can you use Tyvek without sheathing?

When Tyvek^® is used under sheathing, it functions only as an air barrier, and does not protect the sheathing as a secondary weather barrier. Tyvek^® has been used directly over studs where there is no sheathing, although use of sheathing is a highly recommended building practice.