Insulating 100+ year old house
With the price of natural gas doubling over the past few years I am looking for the most cost effective way of insulating our circa 1895 Victorian house.
There is no insulation at all. The attic is completely floored with dimensional lumber. It also has knob and tube wiring. Insulating the attic would be difficult at best.
We have looked at insulating under the floor (the foundation is conventional) but I have heard that the knob and tube wiring should be replaced. Yard drainage is not the best and being in Mississippi the crawl space stays damp.
We also looked at various interior storm windows but have not found anything that seemed suitable. Exterior storm windows are not commonly used around here.
Thanks in advance.