I am weatherproofing a very small (600 sf) cottage/cabin built in 1927 in North Seattle and have been able to insulate between all the floor joists from the crawlspace, but the one spot I cannot crawl under is the entryway. It is very small (4X7). Even with tearing off the skirting, there is not enough space for me to access. Well - I can get my arms under. This is an old porch that was converted to an entry way. The flooring is pretty beat up, so I could conceivable drill large holes and put in insulation that way. I'm pretty sure I could slide in a moisture barrier from the three sides that have skirting, maybe using a 1X2 to ease it into place.
Should I pull off the skirting, then insulate the exterior foundation walls of the entry? I could also measure out the new skirting board and attach the insulation to it before setting into place (leaving the space for any framing empty.)
Any ideas? I'm using electric heat and want to save on power bills so am insulating every spot I can.