Caravan Aluminium Roof Covering
Here's my solution to waterproofing the roof. Well, it's more than a roof - it's what some people call a hive cozy, which I use throughout the year - keeps the 14x12 hive warm in the winter and cool in the summer. You'll note that I've flaired the bottom of the aluminium to shed the rain away from the walls as much as possible. The internal dimensions are a theoretical 10mm larger than the hive. Being so deep (300mm) there's no worries about the wind blowing it off.
The roof is 100mm celotex, the sides are 50mm celotex and the whole is covered with Duct tape. The roof is aluminium from the roof of a caravan in the local scrappy. The joints are Gripfill adhesive with bamboo kebab skewers cut in half as dowels.
The costs:- £2.50 tape from Aldi, celotex from skips, aluminium £1 and a bit of expanding foam to fill the space around the aluminium and stick it to the celotex, so the whole thing cost about £4.50 about 5 hours to make after the materials were assembled.
I completed another one today and the only variation was that I substituted aluminium tape for the duct tape because I found the duct tape was uv sensitive and started to fray after about a year - might have been ok if I had painted it.
CVB