Reflectix works, especially the double layered type if any builders supply near you stocks it - sticks on well with spray contact cement - nearly used a whole 50' roll of 4' wide on daBus conversion and will use it in my 57 panel project

Bill

Moved over to the Passing Lane

"When we tug a single thing in nature we find it attached to the rest of the world" John Muir
"When we tug a single thing on an old truck, we find it falls off" me
Some TF series details & TF heater pics & Rust-a-holics Unanimous parking lot