Posted: 14 Feb 2008, 09:07
"have we reached a verdict on whether to have an air gap or not"
When you use any of this thin type insulation, the air gap is a part of the thermal break. Reading this thread I noticed the comment about using the layered type insulation in the floor. This won't be that effective because you are squeezing all the air out of it. Should be very effective in the panels though (although as it's part fabric I wonder if that would trap moisture too? I'm looking at the foil bubble wrap type.
When you use any of this thin type insulation, the air gap is a part of the thermal break. Reading this thread I noticed the comment about using the layered type insulation in the floor. This won't be that effective because you are squeezing all the air out of it. Should be very effective in the panels though (although as it's part fabric I wonder if that would trap moisture too? I'm looking at the foil bubble wrap type.