The insulation we have installed works very well. It is designed to keep the house both cool during the summer and warm during the winter.
During this hot Japanese summer – with outside daily temperatures in the mid 30s, the inside temperature of the house is a very comfortable 26 degrees. For more details on this insulation (YBS super quilt) you can visit the previous post House Frame going up.
Below are also some photos of the insulation which we are using for the roof, walls and floor.