Quote:
Originally Posted by jmen24
Metal roofing will melt the base layer of a snow pack, thus increasing its weight on sunny days.
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Um, I have a problem with this statement. Conservation on mass, i.e. water is water. You're not going to add weight by melting snow (into water). Add more water to the mix then you have this issue (especially if it rains) as snow tends to collect the additional water and not disperse it.
Remember, volume can change, but in a closed system (nothing added/removed), mass will never change.
Now movement of all the weight to the edge of the roof when it melts is likely and will need to be addressed just like any other roofing material.