Installing double r14 batts for a total Rvalue of r28 spray foam rim joist INTELLO Plus Vapour Barrier system INTELLO Plus MEMBRANES Intello Plus is a high-performance vapor control and airtightness membrane used in building construction. It’s designed to manage moisture and prevent unwanted air leakage in walls and roofs. Here are some key features: Smart Vapor Retarder: Intello Plus is adaptive, allowing it to be highly vapor-open in dry conditions and restrict vapor in the presence of moistur