Do you put Hardie board under shower pan?

The wallboard must be installed 1/8 inch above the shower pan. If the shower pan is not in place, the wallboard height must be guessed, which can lead to inaccuracies and an expansion gap that is too large or too small.

Do you need backer board under shower pan?

The cement board does not need to be placed under a shower pan but you can if you want to. In most cases, shower pans are installed directly over the subfloor with a mortar bed and with the cement board edge just abutting the edge of the shower pan.

Does cement board go over lip of shower pan?

The best approach when installing cement board or other tile backer around a tub is to keep the cement board out of the lip area. Apply it to the wall with the bottom edge about 1/4 in. above the lip of the tub. Then apply a generous amount of thin-set to the bottom bathtub tile and position it 1/8 in.

What goes under a shower pan?

A shower base is a structural base underneath the shower pan. This typically references the layer of mortar and liner sitting on top of your subfloor, beneath the shower pan. Having a liner or sealant put down before the mortar will ensure your subfloor doesn’t get wet.

Should cement board overlap the shower pan?

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. There should be a 1/4″ gap between the tub ledge and the backer board.

Do you tile under shower tray?

We always advise fitting the shower tray before tiling the walls or installing wall panels as this ensures a more watertight seal around the sides of the tray.

Do you tile over a shower pan?

You cannot tile over standard polymer or fiberglass shower pans because they flex too much and will eventually crack the tile grout and possibly even the tile itself.

Does backer board go over shower flange?

The asphalt paper or polyethylene should overlap the tub flange so moisture that collects on the moisture barrier can evacuate into the tub; or more important so it can’t get into the wall cavity. The backer board should overlap the tub flange so the tile has a stable backing to attach to.

Can Hardie backer board be used in a shower?

Installing cement backerboard is one of the more popular choices for a shower wall substrate. Cement backerboards include Hardiebacker, Durock, Fiberboard, wonderboard, and similar products. These materials bridge the gap between expense and effectiveness.