Damp Course for Internal wall

[Ivan in Oz]

G'Day Ppl,

I'm looking to do a Bathroom/Laundry renovation.
Shower, Toilet, Bathroom WashBasin/cabinet, Washing maghine and Laundry Tub.

The Floor is a Concrete Slab with Drainage already in place

I need to errect a couple of new walls, 75 x 50 and 75 x 38 Cypress;
should I put down DAMP COURSE under the bottom plate?
If so what is the choice?

The External frame is Gal. Steel Studs,
going Timber inside.

HELP appreciated
and suggestions most welcome

[Ivan in Oz]

Oh!!

Should I cross Post in STRUCTURAL RENOVATION, ROOFING, DEMOLITION, etc


I'm thinking I know the Answer

[Bleedin Thumb]

Ivan, I'm not a builder or architect but I would have assumed that damp courses are to stop rising damp travelling up a wall due to capillary action.

What you need to do ( I think) is to waterproof the wet area so the water is retained in the area and won't get in contact with the wall lining. Damp course obviously won't do this for you.

[silentC]

Never seen anyone put damp course under the bottom plate of internal walls. As BT says, you need to waterproof the floor and part way up the wall anyway.

[Ivan in Oz]

Perhaps just OverKILL, eh?



Yep,
know about the waterproofing of the wet areas

Thanks.

[Dirty Doogie]

Hmm - my design sheets say you have to isolate any timber framing from a concrete floor in/ or adjioning a wet area by a damp course or membrane.

The diagramme shows 500 micron embossed polythene damp proof course bedded on sealant under the bottom plate and folded 150mm min up the wet side of the frame and 50 mm up the other side - then the wall sheeting - then the waterproof membrane.

Theoretically the level of your slab in the wet area should be 75mm lower than the surrounding slab.