Hi She,<br><br> I can't really comment on the water heater blanket, but I would think it would take a LOT of glue and tape and whatever to keep it on the roof. <br><br>I'm not a super handy person either. This is what I did, on the advice of Bob (forum owner).<br><br>I bought 3/4" thick 4' by 8' sheets of the white styrofoam board from Lowe's/Home Depot (a building supply store). Mine is labeled "R-Tech... Insulfoam A Carlisle Company" It has a shiny reflective side, and a plastic side. I got the 3/4" so that it's bendable. I just cut it enough so that it would fit into place nice and snug, and just shoved it in there. Lots of pushing and fighting to get it all in there, but it's stayed up now since September, and it works AMAZINGLY well. When I wake up in the morning, I'm usually a good 5-10 degrees warmer than the outside temperature, before I turn a heater on.<br><br>I put the shiny side OUT away from me (so that the shiny side is against the metal of the van). Bob apparently did his the other way, with the shiny side IN, towards him. I couldn't imagine all that shiny staring me in the face. I just looked up what you are supposed to do, and the instructions on their website say put the shiny side towards the "dead air space". I'm not sure what that means, but I take "dead air space" to mean the side I don't see, i.e. against the wall of the van, facing OUT. I have no idea if it matters or not, but I'm really happy with what I did.<br><br>In some places I had to use tape or glue or something. I had problems with everything, but eventually settled on Duct Tape (worked great) and 100% silicone sealant (the cheapest silicone I could find). I put the silicone on as a glue, and then I put duct tape up to hold it until the silicone dried. It's worked super fabulous. I did have to move a board recently, and the silicone wasn't super hard to get off of the metal of the van.<br><br>To cut it, a serrated knife works best, and you kind of do a sawing motion, but I used regular knives as well, and it worked ok.<br><br>I definitely recommend this method, and Bob (forum owner bob) did as well. He has something like 4 sheets of 3/4" on his roof. I have just 1.<br> <br>Anyways, that's what I did. I hardly used any of that myself, and it's rigid, so I can stick things to it, draw on it, etc.<br><br>3/4" insulfoam white styrofoam sheets (with a shiny side), around $8 a sheet at Lowe's here on the west coast. The 1/2" is super bendable, the 3/4" thick is just bendable, the 1" and thicker stuff doesn't really bend at all. 3/4" seemed perfect for me.<br><br>For the floor (I haven't done yet, but am doing hopefully this weekend) I plan to use the 1/2" pink styrofoam board material. I met another van dweller yesterday that did this for her floor, and she usually lives in -22F temperatures up in Canada, YIKES!<br><br>Regardless of what you do, I wish you lots of successes!<br><br>With Love,<br>Tara