Hi guys, I know another EWI insulation question :)

We are adding 200mm of EPS insulation to back of our ICF extension where we only have 60mm on outside. Looking at sourcing the EPS and I see special EWI External Classic board from Jablite which comes in 1200x600. Spoke to QuinnTherm, they don't sell a specific product to end customers for EWI but system providers order there EPS 100 & Pearl 100, again cut up in 1200x600 size.

For our application it would seem 1200x2400 sheets would be better and I suspect cheaper as its standard board. Quinn and Jablite both admitted its exactly the same board nothing special for EWI. Has anyone done this, is there good reason installers use the smaller boards, its all pre-aged so shouldnt be issues with shrinking? I guess it maybe simply difficult to ensure proper fixing etc of big boards?

Cheers.
Phil

Also think of ceramic tiles - smaller tiles are easier to contour to the background. - it's the same with insulation; and thicker boards are particularly in flexible

Posted By: Phil.Chaddah-DukeCheers guys, I see what you are saying, I was just thinking about minimising the joints between boards.

Yes I have had the same thoughts about cavity wall insulation..... I suppose if you had a VERY flat surface it would work

Do they ever hold stock, what with 'ageing' of the giant manufactured block before it's sliced up to order? Like seasoning baulk timber so all distortion happens before cutting to final size.

Really? For me, Encon always get it made to order.