cy vernon
How much expansion and contraction would occur on a snap lock standing seam roof with a 25 feet 8 inches length panel that is a 24 guage galvalume material. The standing edge is 1.8 inches high. Also would you consider not hemming the panel at the bottom just letting it run over at the drip edge?
Guest User
It's hard to give an exact amount that the material would move. It varies in different climates and with different grades of steel. Typically with a panel that long your not going to get a lot of expansion and contraction. As far as the panel at the eave line you don't have to hem it over a a style d type flashing, this operation varies with manufactures. The manufacture I work for has been producing snaplock panels for over 25 years and it's not a requirement on our system. I made a mock up last week using the style d and hem method and liked it myself i think it gives a cleaner look and is probably a good idea in high wind areas.
Todd Miller
Classic Products, Inc.
Good response. Thanks.
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