Hi,
I have a child's bedroom with 3 external facing walls, and very little cavity in the wall. The room is freezing. I was recommended to get Dry Lining insulation done. The room is approximately 9ft * 10/11ft.
I have had 2 people out, and both have suggested 2 different approaches:.
1. Kingspan K16 50mm boards (composite insulation, 10mm plasterboard, 40mm insulation), skimmed over the top (entire wall).
2. This guy said the above method is an awful way to do it, and will not improve the heat in the room much. He said we need at least 3-4 inches of insulation on the wall, then the boards put on afterwards, and just the joints skimmed over and taped. He said you should never use the composite stuff.
I read K16 has a very good "U value", and will work just as well. My concerns with option 2 are:
1. Could the skimmed joints crack, since the whole wall is not skimmed?
2. It will make the room considerably smaller. Obviously I would prefer the room to be warm over bigger, but if we can achieve the warm and bigger room with option 1, then that would be good.
Thanks in advance!