Hotwire Viggen

[deantolley07]

I want to build the hotwire version of the Viggen.Where would I get the 4" blue foam at a reasonable price?

 

[Merv]

It depends on where in the world you live. I live where it get's cold, 2" house insulation is widely available, at my local lumber yard, and the big box store, like Lowes.