I need to insulate my barn conversions external walls - approx 500mm thick.
I have been advised to use insulated platerboard (50-70mm + p.board). When I have look at the cost of the boards they are quite steep!. I have been looking at the Kingspan boards. Are there other similar products at a cheap price?.
My guess is they will all be of a similar price?.
What are the implications of using a stud frame type arrangement, with insulation boards (e.g Kingspan), again 50-70mm + plasterboard. I think the component parts will be a lot cheaper but am not sure about heatloss/coldspots at each batton. Will is be significant.