oh dear

[ms.tiles]

Hi all

just thought id mention this and ask the question.

I went to a job to measure up and price for underfloor heating, the plumber brought his electrician along to price it aswell.
We was talking about it and i said the insulation boards needed to be stuck down with flexible powdered adhesive and the electrician looked at me and asked why and couldnt they be screwed down!!

I said they should never be screwed down and he gave me a look that kind of said to me "oh crap ive done loads of them with screws"
Since saying it ive had a niggle in the back of my head, so can somebody confirm i was right or have people screwed them down before??
Wouldnt it invalidate Warm ups warranty?

Thanks in advance
Mark

 

[DHTiling]

I take it is timber floor.?

 

[doug boardley]

I never "just" screw them down, always use a flexible adhesive too.

 

[Stewart]

I do both on a timber floor like this.......

But I only use the adhesive if it's on top of a concrete floor.


Created on iPhone.....

 

[White Room]

I glue and screw on timber floors...

 

[The Legend; Phil Hobson RIP]

Me too. Glue and screw on timber.

 

[MSB Tiling]

Me too. Glue and screw on timber.

Hi Phil, when you say glue what glue do you mean?

 

[The Legend; Phil Hobson RIP]

Sorry mate I use Keraquick with latex plus (Mapei) I tend to cut the boards first then take up one at a time spread the adhesive, then screw so the board is pulled into the bed. Hope this makes sense

 

[MSB Tiling]

Ahh right thanks mate, thought there was a glue id not heard of that I could use.

Mark.

 

[ms.tiles]

hi all
thanks for the replies.
so its as i thought,you cant just screw them down on to wooden floors. i always use flexible rapid set powdered addy but i havent screwed them down before although i havent done many on wooden floors.
the customer has decided against underfloor heating on this job anyway due to cost.
thank you all again

 

[doug boardley]

it varies depending on which country your in, iirc in the USA they recommend using clout nails (+ adhesive)