measuring for insulation
Lots of insulation questions lately I see! We have a small attic ventilation window that is part of the original house that opens into the add on space (inadequate ventilation is a known issue) and is accessible only by tall ladder. I'm pretty sure the window is large enough to get into the attic. We need to insulate it better. How do we measure this space? How do we determine how much insulation we need? Do we have to actually crawl into there to measure? Even someplace to reference to get me started would help at this point!
From our inspection: Insulation type fiberglass batts, installed between floor joists, 3 - 5 inches in depth. The R value of the insulation is less then R30. It is a current recommendation to add insulation to bring the R value to a R30 rating.