decided in the end to go for an 11mm osb board roof cover, and will use shed roofing felt, this is for the shed part of the aviary im building (i asked a week ago about coroline sheets, but not impressed with them and other reasons i dont want to use them)
idealy i'd like to use a felt that i do not have to nail on, as i have a pretty low angle, i think i worked it out to be about 5 degrees,
i guess the torch on felt would be best, but that means fannying about buying a torch and a gas bottle, just for one job,
so i was wondering about either the self adeshive felts, or the cold applied bitumin adhesive that toolstation sells, and normal felt,
but i keep reading about needing 2 layers, an underlay membrane type thing, then a cap sheet,
can i just get a single layer felt that i can stick down without any special tools? area to cover is approx 3 meters by 2 meters, and as usual money is tight, so these 2 layer jobbies are out, as it's about 35 quid each layer, but i dont want the cheapest stuff you can get, that's paper thin and a bee farting on it tears it.