Bathroom - Wet Room / Walk-in Shower Queries

[gwernybwch]

Hi,

I’m in the process of redesigning my bathroom and have a few queries to help me finalise my plans. For the shower, I want it to be a wet room / walk-in shower style where the floor of the shower is level with the floor of the rest of the bathroom.

The bathroom is an upstairs bathroom built on a circa. 1970 extension.

The joists below the bathroom are 7” / 170mm deep. Is this deep enough for the gully / traps and for the flow pipework?

I’m planning to have the pipework (but not the actual mixer unit) for the mains fed shower to be boxed in. On average what thickness would the enclosure take up?

Thanks in advance for any replies.

 

[polesapart]

"The joists below the bathroom are 7” / 170mm deep. Is this deep enough for the gully / traps and for the flow pipework?"

The trap can be accommodated, but forget cutting those joists for a waste pipe.

Think in terms of cutting a hatch in the ceiling below fer access, and then running the waste below ceiling level to the soil stack.

Unless you can plan a waste run that traverses no joists.

BTW How are you planning achieve a slope in the floor to the gully/trap if you start at landing floor height at threshhold, if that's your intention ?


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[gwernybwch]

Thanks for the reply.

From what I'm reading is 7" isn't really enough to space for the trap and the slope in the outlet pipe, therefore I will either need to raise the floor or lower the ceiling.

What is the minumum that is really needed 8* or more?

The trap can be accommodated, but forget cutting those joists for a waste pipe.

I notice that the outlet pipe (around 1" wide) runs through the joists in places. Is this not permitted?

 

[muggles]

It should be 1.5" diameter and should not be notched through joists. The maximum notch depth in a wooden joist, according to Building Regulations, is 10% of the depth of the joist. In the case of a 7" joist, that means you can take out 0.7" or 18mm. If you can get it to run parallel to the joists that will be acceptable