Then the aluminium around the iron nail corrodes and the nail falls of neway ROFL
u had to say that they should use other means of attaching the guttering like plastic shit, glue, intert crap i dunno i wrote stuff tho. (read this in CSSA paper answer or NEAP asnswer can't remember)
i did say aluminum is better tho.
i touched on that too, just in case, however the question specifically asked about the GUTTER only, not the steel nails... but oh well.