Hole for shower waste (help/advice)

Joined
29 Aug 2023
Messages
8
Reaction score
3
Country
United Kingdom
Hi all,

Currently installing a new resin shower tray around 22kg.

I’ve gone for a low profile one and have had to cut a hold for the waste to be flush with the chipboard flooring.

Question is, is that hole too big and could cause integrity loss? I have no access from underneath and I need to get my hand and tool in to cut back the original waste further as it protruded the floor.

Hardiebacker 6mm or 12mm (I’ve bought both) will be installed over the floor before layinh shoeer tray.

The joists are roughly where the white lines are.

I’m also thinking of using a flexible waste pipe as the new trap location is very close to the existing waste pipe so solvent welding might be very tricky in a tight space.

Any advice appreciated. Thanks
 
IMG_3239.jpeg
 
Hire a plumber.
Well no, fortunately the point of this forum is for DIY advice. If I wanted to hire a plumber I wouldn’t have posted this lol

PS, if you don’t have anything helpful to add then please just politely scroll past. Thanks
 
Back
Top