Hi guys,
Need your opinion here. We are building an "energy efficient" home and we are trying to avoid heating and cooling. I've done lots of research into heat transfer but can't get a straight answer in regards to batts. We are having a brick veneer home, behind the brick will be about an 25mm airspace then the foilboard insulation panels which are 10mm thick fixed to the outside of the 90mm pine frame and obviously the batts in the frame then the plasterboard. My question is airspaces are supposed to reduce heat transfer so to take full advantage of this are we best to have R1.5 (75mm) batts against the plasterboard therefore creating a second airspace (about 15mm) between the batts and the foilboard or would the R2.0 (90mm) filling the frame be more/less beneficial in regards to heat transfer. See diagram. I hope this makes sense. Like ⋅ Add a comment ⋅ Pin to Ideaboard ⋅