How long for screed to dry

[aflemi]

Thanks guys, Ajax looks like you may have answered her question in your flooring forum but thanks again from me. appreciated.........

 

[White Room]

The wood should also be allowed to climatize to the temprature in the room it is going to be laid

 

[The Legend; Phil Hobson RIP]

Can't add much more to that Phil ........... apart from perhaps

AAAAAAAARRRRRRGGGGHHHHH!!!

??????

 

[diamondtiling]

Alan is adding the aaaaaarrrrggggghhhh to carry on venting his frustration at the original post Phil, not your input mate. :lol:

 

[Ajax123]

??????

Sorry Phil. Diamond is right - the arrrrghhh was indeed just carrying on from my frustration at the original post......apologies if you thought i was getting at your post.....I wasn't

 

[The Legend; Phil Hobson RIP]

Thanks Ajax, sorry if I took your post wrong, from what I have read from your replies you are the man. I thought my info re: commissioning ufh was wrong, I hope not. I bow to your expertise. Your posts are spot on. Regards, Phil.

 

[Stephen@Weber]

Completely off the point but came across a product recently called maxit 4040 which is a levelling compound that dries in 10 minutes, wow you have to be quick and have someone to wash your tools off!

 

[keith7]

Hi All,

I hope someone can help me answer this?

My builders are paranoid about tiling on the screed for the underfloor heating as they have never done it before and they keep getting conflicting information on dryig times from 2mm/day to 0.5mm/day

They put down a portland cement based screed down a couple of months ago around 80mm deep and there has been no heating on at all in the house whilst it has been really cold (as there still installing the boiler).

They put a damp meter on the screed and the moisture content is just above 5%. What % content will it be safe to start the warm up of the floor and then do the tiling?

Many thanks in advance.

 

[DHTiling]

Hello and welcome..

A screed consisting of Portland cement needs 21 days to cure and dry,, after this period you can then turn on the screed heating and commission the heating .

The screed should be heated slowly at a rate of 5dgs cel per day till a max operating temp as recommended by the in-screed heating suppliers.

The heating is then to be maintained at this temp for a further 3 days before allowing to cool down to room temperature.

You should then have a relative humidity of max RH75%

I would advise the use of an uncoupling membrane on heated screeds.

 

[keith7]

Hi Dave,

Thanks for getting back so quickly. This sounds like it could be just what we are after. One question though and I hope it's not a daft one.

How does using an uncoulpled membrane affect the heat transfer to the room from the underfloor heating. Doesnt it act like an insulator as it's plastic?

Thanks again