What thinset do I use under Hardibacker?

Dry-set mortar for use between subfloor and cement board only (complying with ANSI A118. 1). For walls and countertops: Latex or acrylic modified thinset (complying with ANSI A118.

Can you use thinset on Hardie board?

Since you are putting down hardie board on boards with small gaps, I would not recommend trying to put down thinset under it. It will make an enormous mess under the house (or whatever is under your bathroom). It is also more likely to make the floor uneven since it is hard to level thinset that is separated by gaps.

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.

Do you have to tape seams on Hardibacker?

For tile backer boards such as Durock, Wonderboard, Hardiebacker, Permabase, and others the seams between the board need to be treated with 2-inch alkali-resistant mesh tape. Then a coat of thinset gets flat troweled over the seam. What this does is tie the two boards together and help prevent flexing.

Can I just 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.

Does backer board go over shower flange?

ANSWER – No there should not be a gap between the top of the bathtub flange and the backer board on the wall. The backer board should overlap the tub flange so the tile has a stable backing to attach to. This requires shimming the backer board out from the studs so the wall is plumb.

Do you install backer board before shower pan?

It requires no mud job or waterproofing membrane, but it does require direct access to the studs of the shower. This will create a small lip at the bottom of the shower walls where tiles or an acrylic surround would bump out, leaving a gap. Therefore, the pan must be installed first.

Is Hardibacker better than cement board?

HardieBacker is much more light, and it is also the best selling brand of cement board available. It is much cleaner because it does not have any glass in it. It allows for a smooth job with minimal mess. As a bonus, HardieBacker board has an EZ Grid pattern so you can cut perfect lines.

How big of a thinset do I need for hardibacker?

This is probably because at one time the installation instructions for Hardibacker called for 3/32″ inch of thinset underneath. Currently, Hardibacker calls for either 1/4″ thinset , or 5/32″ mastic underneath .

Which is the best thinset to use for backer board?

Backer board:For backer board on floors, specifically cement board and fiber cement boards (think Hardibacker), it’s my understanding that it doesn’t matter which thinset you use. The thinset doesn’t need to bond to the plywood. Instead it’s part of a system with the fasteners. The nails or screws hold it down and the thinset holds it up.

What kind of Underlayment is Hardiebacker cement board?

HardieBacker cement board is a tile underlayment made for wet areas like kitchens and bathrooms. HardieBacker cement board is a tile underlayment made for wet areas like kitchens and bathrooms. HardieBacker cement board is a tile underlayment made for wet areas like kitchens and bathrooms.

Can you put down thinset under Hardie board?

Since you are putting down hardie board on boards with small gaps, I would not recommend trying to put down thinset under it. It will make an enormous mess under the house (or whatever is under your bathroom). It is also more likely to make the floor uneven since it is hard to level thinset that is separated by gaps.