Andy Simms wrote:
In article , says...

This actually tends to not be particularly expensive and is one of the
most cost-effective measures available for a very large number of
homes...

Depends on the home. Proper weatherstripping is dirt cheap, and VERY cost-effective. If the
home has air leaks, spending a few bucks on properly sealing it will pay itself off within a few
months. The payback period for improved insulation in most houses is years, not months.

Quite right when retrofitting - very expensive. Doing it right or even
going above recommended when building new is cheap.

Harry K