Since I had plans to install window inserts throughout my home (built in 1886) anyway, I thought to share the process so that others might enjoy the same 30%, or more, in savings on winter heating costs as well.

DIY Window Inserts for Older Homes works well both for saving energy on heating costs as well as air conditioning.

Look for the inlink videos at the end for Part I The Special Clamp and Part II The Corner Mold Making Jig.

Camera assist by Josue Paredes.