PROBLEM $6.(20$ POINTS$)$

a$.15$ points

Calculate the $U$ factor of $22$ by $4$ stud wall shown below. The studs are at $16$ in distance. There is

$3\mathrm{.}5$ in mineral fibre batt insulation $(R-13)$ in the stud space. The inside finish is $0\mathrm{.}5$ in$.$ gypsum

wallboard; the outside is finished with rigid foam insulating sheathing $($R$-4)$ and $0\mathrm{.}5$ in $.$ by $8$ in $.$

wood bevel lapped siding. The insulated cavity occupies approximately $75\%$ of the transmission

area; the studs, plates and sills occupy $21\%$ and the headers occupy $4\%.$

b$.5$ points

In a condominium in Toronto, Ontario an owner is complaining of mold on an outside wall. T

wall is in a "solarium" a room with large windows. An inspection confirmed the mold exister

The wall is concrete and the inspector found that there is no insulation, as that room

supposed to be a balcony, and was enclosed later by the builder that sold the apartment wi

"solarium".

Indicate how the problem can be remediated.

Comment on moisture flow in an enclosed environment.