I am in zone 3, and I was able to find the R value requirements pretty easily. However the vapor retarder part is a bit confusing. Some documents say you need it on the interior, some say exterior, some say none at all and that paper kraft or paint has the right permeability. I've even read somewhere that you can sandwich vapor barrier between 2 layers of insulation.
I am so confused. Is there a definitive answer for this?
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!