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Glue insulation PIR to concrete slab?


ashthekid

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59 minutes ago, ashthekid said:

Somebody has recommended I glue down, with cheap tile adhesive, the 100mm celotex insulation I intend to use before plastic vapour membrane layer, UFH and liquid screed.

Has anyone ever done this before? 

I can see the logic, as 50mm of LS has little weight per m2. One assumes they refer to the non foil-backed PIR?

Edited by Nickfromwales
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1 hour ago, ashthekid said:

Plastic knock ins?

Yes 

A plastic stem with a 50 mil head 

10 mil hole and a couple of taps with a hammer 2 minutes per sheet 

 

Readyfix sell them 

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2 hours ago, ashthekid said:

And they screwed into the concrete easily?

Just drill a hole, push them in and then tap in the centre rod and it spreads out and grips like a wall plug

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