Module 10: Strategies for Insulation

Question 1

what is the nominal R-value target for sub-slab insulation?

Answer 1

R-4 to R-20

Question 2

What is the nominal R-value targets for below grade insulation?

Answer 2

R-12 to R-26

Question 3

What is the nominal R-value for rim joists and headers?

Answer 3

should be insulated at the same level as exposed floors and attics -R-40 to R-80

Question 4

what does dense-pack mean^

Answer 4

means that the cullulose is blown into the wall or floor cavity under pressure, so that it packs tightly and has no room to settle, resulting in a completely filled wall that has good insulating properties, reduces air floow through wall and provides sound dampening

Question 5

what types should the steel framing be?

Answer 5

• vapour permeeable

- indent to accommodate screw heads so it can lie fat over the steel studs

Question 6

which type of cell spray foam can act as a vapour barrier?

Answer 6

closed cell foam

Question 7

what is one of the weakest points in the building envelope?

Answer 7

eaves because several pieces of wood join and intersect