I am building and insulated UDS. I continued to smoke through the winter, but here in Ohio, it got down to -15*. That kind of weather is hard on everything. but when it did come up to 0* I was out there getting my smoke on. Wind has always been a factor on all of my smokers. I have had enough of that and have set out to build the ultimate scrap metal insulated UDS. Here are some photos of my progress so far. If you have any ideas to share, I love to here them. Above is the base made from 2" angle Iron. Above is the basic frame. It will be divided into two compartments. One for the UDS and one for a grill. The gray rectangle is a duct that I bent on a brake for a slide out drawer for the coal tray. Here is the duct cut in and welded. I sealed it with High temp RTV for good measure. The frame next to it is for the outside flange when I put the outside wall on. I cut in some ducts for cross connecting the smoker and grill. If nothing else, I can use the blower for the smoker to stoke the grill at start up. In this picture you can barely see the insulation on the bottom. It will have 2" of insulation all around except for the top. Well here is the start. I look forward to your input!