Wood and organic materials
Which is better, OSB or plywood for roofs, walls & floors?
...vapour permeable sheathing membrane. This risk may dictate the use of insulation products with high vapour permeability and low water retention, such as mineral fibre."
Where to put vapour barriers (CMHC):
"Materials that act as vapour barriers (vapour retarders), including certain types of insulation, must be located ...
