Your client has proposed substituting the use of a single layer of $3$ mineral wool semi$-$rigid insulation for the two layers of polyisocyanurate insulation.

$1.$ How would this substitution affect the building performance?

$2.$ What aspects of building performance need to be investigated and by whom?

$3.$ What effect will this substitution have on the placement of the water control layer?

Answer rating: 100% (QA)

1 The substitution of a single layer of mineral wool semirigid insulation for the two layers of polyisocyanurate insulation can have several effects o... View the full answer