Jump to content

UFH in slab - info for our builders?


Roz

Recommended Posts

Have a look here at the bottom of the link at the installation bit if you want to add legitimacy to the idea. I used the red Polypipe panels btw as did I think @PeterW

Not sure if I would again as I reckon I'm au fait enough now to clip straight to the pir but it's damn quick and easy! Pretty cheap too.

 

https://www.polypipe.com/housing/polypipe-underfloor-heating/solid-floor-systems

Link to comment
Share on other sites

  • 3 months later...
1 hour ago, Oz07 said:

@Roz how has this progressed? Any pressure tests since installation. As an aside, how come dpm detailing is so finicky then you can go and bang ufh staples in?

The UFH staples tend to stretch the DPM and then it still seals tight-ish to the staple. Not ever had an issue, but with liquid screed they put a much thinner ( 1200 ) membrane over the lot to keep it leak free. With concrete it's not as much of an issue as the water tends to separate out and the concrete stays put. 

Link to comment
Share on other sites

  • 3 years later...
  • 1 month later...
On 03/06/2023 at 10:07, wardie9025 said:

Just about to push the go button on a retrofit UFH in the slab.....any follow up experience/comments as its been a few years since these works were done??

 

Any and all input very much appreciated!

 

Gaz

I mean we have had no issues with ours, ufh has been running fine and no issues as far as I know 😂 . Hope yours goes / went ok!

Link to comment
Share on other sites

This was ours, a little over 10days ago. 
 

125mm concrete, on 240mm pir.

 

puffed it up to 5 bar for the pour.

IMG_3021.jpeg
 

I would have preferred to use pex-Al-pex, but I didn’t have quite enough in stock and I was battling against time on this one, my wife and I threw it down after work one evening. That’s continal pe-rt, in 16mm.

 

My builders did theirs in slab too, I think the accepted wisdom is changing nowadays.

Edited by HughF
Link to comment
Share on other sites

  • 2 months later...

I’m planning on doing heated structural slab it’s about 7m by 15m 250mm deep in an isoquick foundation system. Did you guys have to put control joints ie shallow cuts in the slab to prevent cracking in unwanted places?

Edited by gavztheouch
Link to comment
Share on other sites

  • 5 months later...
On 22/02/2019 at 15:49, recoveringbuilder said:

Ours was put in on the mesh and pipes were pressurised at the time, so mesh was sat 50 mm up on little holding things then pipes attached to mesh then the pour22DFA40C-DFD6-4926-87C9-BC4EFA20FCB1.thumb.jpeg.c3553c947dac690f0f55840245572fd2.jpeg9F436F7E-025F-4343-8276-4A3F1470E0AA.thumb.jpeg.29b37c1273d898619c9b2f9b9aefb9e1.jpeg

Thanks for this.  Makes much more sense doing the slab this way.  Did the contractors who did the slab also power float it?

 

Link to comment
Share on other sites

  • 2 weeks later...

We had a 170m2 200mm slab put down and powerfloated with a graphite coloured dry shake on the top, came in at about 4k ex-vat IIRC. 

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
×
×
  • Create New...