You're spot-on about sealing up those drafty spots around the windows and doors—makes a huge difference. Can't tell you how many houses I've worked on...

Agree about sealing and flashing—seen too many DIY jobs go south because folks skimped there. Also, don't underestimate leveling and shimming...nothin...

I've seen the DIY tactic work a few times, but honestly, with windows it's a bit trickier than flooring. Most salespeople know window installation isn...