Laying a concrete floor with two levels of dpc

Postby tannoy » Thu Sep 11, 2008 10:26 pm

Hi everyone, I'm laying a 4" reinforced concrete floor on a dpc membrane.

On top of that I have read I need to put another dpc before I put 4" of floor styrene to which I'm adding water underfloor heating and then a 4" screed to finish off.

My question is how long to let the first four inches dry out before I put the next layer of dpc. I read I need this dpc to protect the polystyrene. If I cover it before it's completely dried right through will I have problems because the moisture is trapped in or will it eventually dry out. Any advise is gratefully received. Thanks
Rank: Labourer
Progress to next rank:
Posts: 1
Joined: Thu Sep 11, 2008 10:02 pm


Simply Build It

Postby mdpmspitfire » Wed Nov 26, 2008 10:17 pm

i would suggest you allow several weeks to allow drying as you are right that the moisture will be trapped. using a dehumifier on a low setting would help but dont dryout too fast. air circulation is best but this time of year and damp air doesnt help
Rank: Tradesman
Progress to next rank:
Posts: 36
Joined: Wed Nov 26, 2008 9:32 pm

Postby TheDoctor5 » Fri Jan 30, 2009 9:13 am

If you type the key words of your question into our search box to the left of the site you may find the answer is already posted or is in the DIY projects section of the website. Every post goes through a monitoring process and using the search box may speed up your answer.
Posts: 1382
Joined: Tue Jan 20, 2009 9:17 am

Display posts from previous
Sort by
Order by

  • DIY How to Project Guides

  • DIY how to tutorial projects and guides - Did you know we have a DIY Projects section? Well, if no, then we certainly do! Within this area of our site have literally hundreds of how-to guides and tutorials that cover a huge range of home improvement tasks. Each page also comes with pictures and a video to make completing those jobs even easier!


  • Related Topics