Are drafts around old windows usually a window problem or an installation problem?
I've noticed that whenever drafts around windows come up, the answers are all over the place. Some people blame old windows. others blame poor installation. I've even seen people argue that the biggest issue is usually air sealing around the rough opening and not the window itself. for builders, renovators, and homeowners who've actually solved this problem, what tends to be the most common culprit?