I’ve read several posts on the concern of using contact cement to adhere the aluminum skin to the top of teardrop trailers. I followed the current idea of using Henry’s 663 carpet adhesive and glued down the roof skin with it and then began wondering if this was necessary. When I have put an item that was glued with contact cement out in the sun on a warm day the adhesive let loose in a few short minutes. It didn’t hold tight like some would suggest. I also have on occasion used a house hold iron to remove p-lam (plastic laminate/Formica) when it has become damaged. Everyone says that the trim holds the aluminum sheet in place . So I thought what’s the big deal, why go to all that trouble & mess slapping that messy glue down & running straps over the roof with sticks when all one would need to do is spray a coat of contact cement and lay the aluminum down. When I got to the hatch I went with my own gut feeling and sprayed two coats of contact cement and I was done in no time and I’m confident that when it gets hot the glue will soften and my plywood will be intact. One of my trade magazines “Cabinetmaker” had an article last month listing the strengths of all glues used in the woodworking industry. Contact cement was listed as low in strength. I’m not suggesting you use contact cement to glue down your roof aluminum, just think about it. IMHO Danny 
