I had a 5 band quad mounted on the roof on a 10 foot tower. The ice damaged the quad but the roof had no problems at all. I put a TH5 on the tower after taking the quad down. The TH5 weighed a lot more than the quad did. I"m not sure what the difference with ice was but there was never a problem with the roof. If you're worried about the roof though, you could double up the beams under the antenna support. Now I just started getting the parts to make a hex but it will be a while because of my budget. At least I know it will get made eventually. I don't think it's going on the roof though because my support was taken down when the new roof went on.