what would you do????

[Andy Tiler]

You need to measure moisture in anhydrite over 48 hrs.. a simple touch substrate meter does not read at the base IMO..

If cement screed gets wet it can be fine to tile when some damp is within it and use a vapour membrane but anhydrite you have the issue of sulphate migration Andy..

Have you tried a simple sweat test..?

I know it's damp though Dave,you can see it! Most of the floor is bone dry but there's a patch right near the door that's staying damp! and I can't tile until its all dry?. Grrr

 

[CJ]

Set fire to room below. :smilewinkgrin:

 

[Andy Tiler]

Set fire to room below. :smilewinkgrin:

That's an idea!!! Lmao....

 

[DHTiling]

I know it's damp though Dave,you can see it! Most of the floor is bone dry but there's a patch right near the door that's staying damp! and I can't tile until its all dry?. Grrr

Bummer... lol ..

 

[The Legend; Phil Hobson RIP]

So Andy, this is a floor laid on plasterboard? I thought you meant a gypsum screed, ie calcium sulphate, I was going to agree with Dave about the sweat test. But is this just water damaged joists? Not to sure what the problem is now.

 

[Andy Tiler]

So Andy, this is a floor laid on plasterboard? I thought you meant a gypsum screed, ie calcium sulphate, I was going to agree with Dave about the sweat test. But is this just water damaged joists? Not to sure what the problem is now.

Evening phil! It is a gypsum based floor mate!not pboard....the joists under the step and shower are goosed hence ive ripped them out.its just the floor is taking a while to dry?.... Lol

 

[White Room]

For some reason I got it wrong, thought it was boards....

 

[The Legend; Phil Hobson RIP]

Hi Andy, sorry I got the wrong end of the stick, in that case I would take Dave's advice, a sweat test.Put a 1m2 sheet of visqueen and lay it on the suspected damp patch, leave it for a few days and see if it sweats, better still a hair hygrometer test.

 

[Pebbs]

Andy, this is what I would do, and you can take it or leave this advice. In situations like this (and funnily enough I have a similar situation going on right now). Tomorrow morning I am issuing a 'disclaimer' because I am now seriously under pressure to bring a contract in on programme. It will basically state we will undertake the works as instructed but we accept no responsibility, in any shape or form for any failures, as a direct result of the substrate not being ready to recieve the material.

The client then signs and dates it, and you carry on.

Basically you throw the problem right back at them.

Good luck

Lynn

 

[Andy Allen]

3 years time they will be revamping it again anyway...