I am working on re-insulating a shed (350 sq. ft.) that has been used as a workshop. It has T1-11 siding and 2x4 walls. I've taken down all the interior paneling and had electrical updated. Now, to insulate before drywall.
Most of the T1-11 exterior siding will need to be replaced, and spray foam in place is not in the budget. What is the best way to increase the R value and should I put a vapor barrier on top of the insulation before drywall?
When I eventually replace the siding, I will use Tyvek on the exterior so unsure as to the best way to insulate the interior - will R15 paper-faced be enough?
I live in Maryland - temps can range from 10 - 95. I plan to use the building as an office and workout space. Thank you!