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Is a dpc on a garage floor necessary

Postby baggy-shirt » Thu Feb 14, 2008 3:52 pm

Hi Guy's, sorry to be a bit thick but a guy has laid my garage floor with the required ammount of hardcore and about 3 - 4 inches of concrete - but he didn't lay a DPC as I had requested.

He is adamant that a DPC is not necessary and states that the concrete will sweat anyway giving off moisture.

I think that this is not strictly true but ... i'm a computer engineer not a builder.

can anyone give me some advice please?
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Simply Build It

Postby tonnee » Fri Feb 15, 2008 12:15 pm


Not sure if it is needed or not, but my builder laid some visqueen sheeting down before the concrete went in.


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Postby Perry525 » Sat Feb 16, 2008 4:03 pm

There are millions of buildings about that do not have damp proof membranes.
Think of garden walls, most don't have a DPC.
Damp doesn't do any harm to a building, until it comes into contact with wood or something else that will rot.
Fix a DPM round your garage door, or whatever and all will be well
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