Installing a fiberglass shower pan

[DADI03]

I am installing a fiberglass shower pan on a slab. The slab is pretty level. I have watch some videos on how to do this. Some video show putting down a mud bed and setting the pan in it and some do not. Are there any plumbers here that would recommend doing it one way or another?

 

[ADAduckhuntr]

 

[the_great_white]

putting the mudbed under it keeps the pan from flexing, which will lead to cracking.

also helps make sure you're true level.

 

[DADI03]

Do you leave a space where the drain goes in or mud the whole thing?

 

[the_great_white]

leave enough space around the drain to be able to repair/fix if it leaks or something.

 

[Just1more]

For extra protection make sure to paint down some redguard waterproofing as even concrete will not stop water. It will wick it up and carry moisture to other areas.

 

[DADI03]

The floor has paint on it from the previous owner. Not sure what it is. Should l put some paint over it?

 

[ADAduckhuntr]

The floor has paint on it from the previous owner. Not sure what it is. Should l put some paint over it?

No, seriously.
Remove the old paint prior to waterproofing.

 

[Just1more]

Redguard is liquid rubber. If it's just painted it probably needs more protection.

 

[DADI03]

Do fiberglass pans really have a history of leaking that bad?