This is a followup to the insulated workshop door, and for the naysayers. I use my shop year round and it's important that the temperature remains stable. I have received a lot of negative feedback as to why this is important. The bottom line is this, I can use the shop day and night all year in total comfort with a minimal cost and produce the same results. The proof is in the numbers, low heat lose in the winter, low heat gain in the summer and low energy cost.