Laying Underfloor heating Pipes

[Taliz]

I am laying underfloor heating pipes, followed by a sand and cemend screed.
I have read that the pipes need to be under pressure whilst the screed is layed and dries.

Is this really nesessary. There are no joints under the screed. I will heat the floor up fully and allow to cool before tiling to get any possible cracking out of the way.

I cannot connect the pipes to the manifoild as the walls are not plastered and there is no roof on the extension yet.

 

[DeltaT2]

I am laying underfloor heating pipes, followed by a sand and cemend screed.
I have read that the pipes need to be under pressure whilst the screed is layed and dries.

Is this really nesessary. There are no joints under the screed. I will heat the floor up fully and allow to cool before tiling to get any possible cracking out of the way.

I cannot connect the pipes to the manifoild as the walls are not plastered and there is no roof on the extension yet.

Most put a board on the wall mate & connect the manifold/pipes etc. This will permit you to test as required. And a test is required, this not only ensures all the pipes are water tight, but if you leave it on test, and a pipe gets damaged you'll know right away.

You don't want cracks in any concrete containing pipes mate, two concrete surfaces moving will bust the pipes!!

 

[Taliz]

Thanks for the reply.

Have ordered the manifold so I can connect it all up before screeding.

Cheers