PIR for underfloor heating insulation

[KTB]

We are looking for 56 sheets at 2.4x1.2m of 160mm PIR as underfloor insulation below our UFH pipework.

 

Does anybody have any recommendations re: a supplier? Central Scotland.

[JohnMo]

I got mine from an online seller.  Best to go through a lot of them as prices vary daily, one day they are cheapest next not. But also challenge your preferred local merchants.

 

That amount should be free delivery.  Would also consider doing it in two layers instead of one with staggered joints.  100mm was bad enough, 160mm would be a pain to install.

[eandg]

30 minutes ago, JohnMo said:

I got mine from an online seller.  Best to go through a lot of them as prices vary daily, one day they are cheapest next not. But also challenge your preferred local merchants.

 

That amount should be free delivery.  Would also consider doing it in two layers instead of one with staggered joints.  100mm was bad enough, 160mm would be a pain to install.

My experience is merchants will at least match what the online places can do. Particularly helpful if you have a credit account. 

[Polish Builder]

as far as I know 160mm is not available so you can go for 2 layers of 80mm or 165mm but thick boards are very hard to cut and fit.

[Jenki]

6 hours ago, KTB said:

We are looking for 56 sheets at 2.4x1.2m of 160mm PIR as underfloor insulation below our UFH pipework.

 

Does anybody have any recommendations re: a supplier? Central Scotland

Saw your post on "self build scotland" Facebook group,👍. The surprised comments that you "want to put so much insulation in" make me laugh .

 

Anyway, Jewson's self build account seems  to be a good option, they are sourcing me 100mm EPS sheets for my foundation slab, and are delivering free to site North Highlands.

[Iceverge]

 

300mm of EPS @0.038 will be about the same as about 180mm of PIR but about £2444 cheaper than 2x90mm Celotex boards from the same supplier.

 

 

 

 

 

[saveasteading]

12 hours ago, KTB said:

any recommendations re: a supplier?

Our best price was from the local, family BM. beat the online suppliers and the specialists. not by much but enough, and a superb delivery service.

My experience of the big BMs was that they just piggy backed off the specialist suppliers, and it was better to go direct to them.

 

btw you are doing the right thing by not mentioning trade names. Sheffield Insulations (now SIG) told me that if you say, for example, Celotex, then they are obliged to only quote for it, and not offer alternative brands.

Edited March 3, 2023 by saveasteading

[Dave Jones]

11 hours ago, Iceverge said:

 

300mm of EPS @0.038 will be about the same as about 180mm of PIR but about £2444 cheaper than 2x90mm Celotex boards from the same supplier.

 

 

 

 

 

 

 

yup EPS all the way!