If needed use 2x4 lumber to frame in the box that will serve as the form for the concrete pour.
How to install a shower base on a timber floor.
Use a broom or a vacuum to clear loose debris.
Make any additional surface preparations that are recommended by the shower pan manufacturer as necessary such as applying a fresh coat of a water seal product to the.
Chisel away any flooring that would be under the pan before attaching the drain hole s strainer.
Use a wide blade putty knife or a paint scraping tool to peel off old caulking and adhesive.
You need to notch the corners for a two inch overlap.
Place cardboard or another material into the shower pan base to protect its surface.
Mixing pouring the pan.
Press the fabric into place with the trowel on both the pan and the wall.
Prepare the area for installation.
Press the shower pan base into the mortar adjusting it until the entire base is level.
Clear all debris and old adhesive from the surface.
Lay down cardboard to protect the fabric as you do the wall to floor connections.
Use fabric strips to build the shower pan waterproofing.
Put the thinset on the floor and wall focusing on the inside edge.
Mix the mud according to manufacturer instructions.
Vacuum the subfloor and check the level.
The shower in this project will be flush with the side of the whirlpool bath so the frame needed to extend under the tub overhang.
Put the new base in place and double check the level before securing it with galvanized screws and connecting the drainpipe to the shower pan s strainer.
Place the shower pan onto the mortar making sure the pre drilled holes on its rim line up with the wall studs.
Pour it into the curb frame until the mud reaches the top of the wood frame making the top as level as you can.