Posted 2/15/2013 22:49 (#2902332 - in reply to #2901901) Subject: Re: roofing metal cut?
According to a local metal supplier, Sheet metal needs to be sheared or nibbled so it's less resistant to rusting. You basically have a very thin aluminum layer over a thin steel core. Shearing or nibbling presses the aluminum layer to enclose the steel layer.
roofing metal cut?
