Hello,

I've just torn up the floor in our bathroom to install a new drainage system and new floors. The drainage pipe is 100mm, which is also the thickness of the joists. I've known this because I can see everything from the basement (which is uninsulated), but now that I have the floor up, I thought of trying to insulate it better.

As it was from the bottom:

asphaltboard
wind paper
insulation
rough sheathing
masonite
wet room carpet

As we've planned to do it:

asphaltboard
wind paper
insulation
wet room chipboard
self-leveling compound (probably to create the slope)
wet room carpet

What I was thinking was to use subfloor panels by the drain instead, so I can fit the drainage "inside" since the panels are thinner. Do you have any other tips on how to do it?

One idea was to build down a bit in the basement to make room for more insulation, but there is a door just right below, so you'd bump your head on the "build-down."

Grateful for some ideas...
 
Attached is a picture of the whole thing, you can see what I mean in the bottom right corner.

A quick extra question, should I set up studs and place a Purus plate around the well?
 
  • Construction site showing exposed plumbing with a Purus drain in the lower right corner, framed by wooden beams and debris scattered around.
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