Internal wall insulation sol cork

khickey88

I'm looking to have a few walk internally insulated in a noise we are moving into. Just been told about a thing called sol Cork or thermo Cork has anyone used it or had it done? Apparently its just sprayed on and it only 4 mm think. 

FreeBear

Any coating sprayed on that thin is not going to do much to improve the insulation of a wall - For the money you waste, there are far better options.

To insulate a wall effectively, and to meet current standards, you need 60-75mm of Celotex/Kingspan type boards.

khickey88

FreeBear said:

Any coating sprayed on that thin is not going to do much to improve the insulation of a wall - For the money you waste, there are far better options.

To insulate a wall effectively, and to meet current standards, you need 60-75mm of Celotex/Kingspan type boards.

Pretty much what I was thinking. Never heard of it

FreeBear

It has cropped up here once before - Just didn't know it was that expensive though. But if they exaggerate the claims and go for the hard sell, no doubt they'll find people to buy in to it.

If you want a high performance thin insulation, then Aerogel is the stuff to go for - Just make sure you are sitting down before looking at the price.

Megaross

It's probably closed cell foam spray insulation, 4mm isn't really enough to do much though.

Better off pinkgripping some insulated plasterboard up there or dry line with insulation.

FreeBear

Megaross said:

It's probably closed cell foam spray insulation, 4mm isn't really enough to do much though.

Better off pinkgripping some insulated plasterboard up there or dry line with insulation.

.

Nope. CorkSol is a thing. It is finely ground cork granules mixed with an unspecified binder (probably an acrylic resin). The quoted thermal conductivity is 0.065W/m.K, which at a thickness of 4mm will give you less effective insulation than a skim of plaster.

I agree, if you are going to spend that sort of money, you may as well slap on some insulated plasterboard - £1600 will buy quite a big pile of insulated PB and will deliver some worthwhile savings.

If you want to play with the numbers, I can recommend this u-value calculator - https://www.changeplan.co.uk/u_value_calculator.php - When punching in the numbers, start from the inside and work your way out to the external surface.

khickey88

I'm probably going to go with the insulated plasterboard I'm not fussed about losing much floor place and seems the better option. 

Chickereeeee

Cork tiles used to be sold, and we're often glued to walls. They were only a few mm thick, but actually made a difference when you felt the wall (felt  less cold), and I imagine, to the formation of condensation. Not so good for reduction of overall heat loss though.

stuart45

You can still get cork tiles.

FreeBear

stuart45 said: You can still get cork tiles.

And if you want thicker, places like Mike Wye can supply boards ranging in thickness from 20mm all the way up to 160mm - Pretty good thermal performance too at 0.037-0.040W/m.K, so comparable to polystyrene.

Two advantages of cork over (most) other materials - It is green & environmentally friendly. It is vapour permeable, so a good match for lime render on solid brick/stone walls.