On Oct 14, 10:05*pm, wrote:
Live in 60 year old 1300 Sq Ft single story brick house with full *basement,
it has recent 600 Sq Ft addition with about 3' crawl space. Live in Michigan
(zone 5) and winter heating bills are a killer. My basement is very cold and
drafty in winter...in dead of winter temp check showed *around 37
degrees...I have hot water heating too by the way. The House came with newer
Anderson windows and two years ago I *blew cellulose *insulation into all
walls that were not insulated...also added about 6" in attic....so total of
about 12" of cellulose there. *Oh and I also did my best to caulk everywhere
possible in basemen last winter, but seemed not to help much.......I have
noticed that the inside walls of basement are like ice cold to the touch
too. would it be worth while to dig down a couple of feet and insulate the
outside of basement and crawl space?? If so how to do it? Any advise
appreciated...

To pinpoint air leaks and know what you need get an energy audit and
blower door test, also an IR photo. A blower door test will give you a
computer printout of air exchanges per hour and how many there should
be, the tech, with a smoke stick will show you what is leaking. 12+
cellulose in attic is not optimal in zone 5, first its likely 9"" now,
cellulose settles, but 12" is maybe R 43, optimal is near R60.
www.energystar.gov has good info