The batts should really be directly touching the foamboard to eliminate any conductive loops; http://joneakes.com/jons-fixit-database/743
As per code, the frame wall/cavity behind should be fire-stopped every 10' horizontally; http://publicecodes.citation.com/ico...002_par018.htm
ADA the drywall, to stop room air from getting to the concrete wall; http://www.buildingscience.com/docum...wall-approach/
Remember the rim joists; http://www.buildingscience.com/docum...l_seal_rev.pdf
For your location; if near Boston- 1" f.b. leaves the inside f.b. at 39* on your coldest days in winter with only 32% RH
in the room. 1-1/2" f.b. = 57%RH at 70*, much safer against condensation there. If near Worcester- 1" f.b. = 24%RH
, 1-1/2" f.b. = 49%RH.
PS. welcome to the forums!
Clothes taking longer to dry?
Clean the dryer screen in HOT water if using fabric softener sheets.
They leave a residue that impedes air-flow, costing you money.
Clean the ducting in the last six months? 17,000 dryer fires annually!