One of the big questions is knowing what sort of pitch your roof has as that may impact what metal roofs would work for you.
The summer heat will not be a problem as far as installation. If you think you may ever heat the cottage then now is the time to address any ventilation issues and hopefully avoid future ice damming issues.
I would ask contractors about their experience level and try to talk to past customers.
Todd Miller
2012-06-22 06:42:04.000000
We have an older, one story cottage with a barely sloping roof. We've been advised that a metal roof is our best option for replacing the current rolled roofing, which is in very poor shape. As the roof cannot be seen from the ground and cost is a consideration, unpainted galvanized steel has been suggested. We have no idea what questions we should ask about suitability or installation. Will summer heat be an issue? The cottage is unheated and uninhabited in the winter. Will this cause problems?
Marilee Clark
2012-06-21 09:02:44.000000
+1
Do the project correctly once and be proactive about that air sealing and insulation issues.
Nothing about metal addresses the heat loss issues or resultant ice dams. Metal just keeps the ice dams from coming in usually.