

Rotted sills can be temporarily fixed with masking tape and paint until you have time to do it. Missing or cracked muntins can be patched in with new wood or filled in with Bondo. Start with a few not so bad windows to learn, and then tackle a few harder ones. Go slow, and plan on working over a year or two a little at a time. If the number of windows are limited, you could try chemicals for the sash, and heat gun for the casing. Infared is another possibility for safe paint removal, but they are pricey. Do not use a heat gun near glass! The glass will crack. The very best is John Leeke, decades of experience, useful tips for temporary repair, lots of helpful videos on his website, and a very thorough book) (9 tips) (stremlined version of his web site, good lead paint tips) (lots of videos and downloads) Book: qid=1355004013&sr=8-1&keywords=john+leeke ($40) Cheaper book: $12 Stripping paint: (safer and more economical than other methods to remove old paint) Basically this is a commercial grade clothes steamer retrofitted with ShopVac parts. The problem could be the type of putty you are using as well. There is a program in Michigan (Historic Preservation Network) that teaches young workmen how to repair windows at a rate of about one day and $100 each.

Not that difficult, but does take some practice. Back when, people grew up learning these skills, folks broke out the ladder every fall and spring to check and for touch ups. Replacing window putty window isn't that difficult, and there are many resources for fixing broken panes, and so forth. A typical wall has an R factor of about 10. Windows only have a 1 (single glazed) to maybe a 3 and a fraction R value for the very most energy efficient windows you can buy. A lot of old windows aren't so bad in themselves, but the surrounding wall isn't insulated, so lack of insulation around with window could be the source of drafts.

Stripping paint is a requirement for proper repairs and the windows may need new weatherstripping and caulking. The great thing about wood windows is that all that stuff can be fixed, if you are willing to invest the time.
