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https://www.askthetrades.co.uk/cgi-bin/yabb/YaBB.pl DIY Forum >> Carpentry Questions >> Real wood layed on screed https://www.askthetrades.co.uk/cgi-bin/yabb/YaBB.pl?num=1243460171 Message started by dr strange on May 27^th, 2009, 10:36pm

Title: Real wood layed on screed
Post by dr strange on May 27^th, 2009, 10:36pm

One or two may have asked this before, but I still need to throw this out there.

I am about to lay 18mm thick real wood oak boards on a floor that was screed finished, then had liquid latex put over the top (as a section of the screed didn't set), but need to know a few things.

a) This is a new build room, which I have given the floor 6 weeks to dry so far, is this long enough?
b) What would be the best way to test the floor for dampness?
c) I will use a 3mm DP membrane and 5mm soundproof fibre boards bought from your average DIY shop. Is this the right stuff to use?
d) The boards will be glued down, any suggestions as what is the right, or wrong, way to go about this?
e) And I'm also just looking for anyone's tips on laying this stuff as I've got a load to do. And it was expensive (for me) so I can't really afford to see the whole lot bend and warp due to dampness.

Thanks for any help.

Title: Re: Real wood layed on screed
Post by Zambezi on May 27^th, 2009, 10:52pm

You want to try asking this in the carpentry section, this section is for forum stuff, not trade tips.

Title: Real wood layed on screed
Post by Lectrician on May 28^th, 2009, 6:30am

This Topic was moved here from The Forum by Lectrician.

Title: Re: Real wood layed on screed
Post by jasonB on May 28^th, 2009, 7:40am

a, depends on depth of screed, ambient temp and humidity, liquid screed or traditional sand/cement?

b, Moisture meter

c, For a floating floor should be OK

d, what will you be glueing it to the underlay wont hold it down and it is then not a floating floor

e, whats the size (width) of the boards are they designed as an overlay or do they need fixing down?

Jason

Title: Re: Real wood layed on screed
Post by CWatters on May 28^th, 2009, 10:09am

Is there UFH?

Title: Re: Real wood layed on screed
Post by Joiner on May 28^th, 2009, 6:01pm

The best damp test is the simplest.

Tape a foot square of polythene to the floor and leave it for a couple of days. If it mists up you've got a damp floor. If you can leave it for another couple of weeks to see if it's just the screed drying out (notwithstanding the latex) then try again and see if there's any difference. If you can't wait, just lay a moisture barrier (you can get it from any flooring place that sells laminate), top it with a layer of 'underlay' (comes in rolls, also used with laminate) and lay the boards as a floating floor, gluing them together, leaving a good expansion gap around the edge of about 15mm, or to come just within the skirting board.

That's one method, there are about three thousand others! Everyone has their favourite.

Title: Re: Real wood layed on screed
Post by CWatters on May 29^th, 2009, 10:06am

Probably best to ask the company that supplied the wood floor to ensure you meet the terms of any warranty they included.

From what I can tell if there is UFH you normally glue it down to the screed. If there is no UFH you put down an underlay and allow the wood to float (PVA glue the T&G together only).

These people have a book on the different methods!
http://woodyoulike.co.uk/index.html

They sell wood flors and underlays.

Advice on how to glue the T&G....
http://faq.woodyoulike.co.uk/2007/07/correct-way-of-.html