Steve wrote:

I have about 250 sheets of used (in good condition) 26 gage roofing
material. They are all 16ft long and I will need to cut many to other
lengths while adding a shop extention.

I have tried tin snips and these cause distortion of the ridges and
spreading of the ridge pattern, hence sheet width. Not much, but enough that
I get a "fan-out" effect in the width. Also unable to fit tightly to the
next upper sheets.

I also tried cutting with an hand operated electric sheer as well and got
similar results.

Abrasive cut-off leaves a burr on the edges and I can to a lot using a hand
grinder. Recipricating saw produces similar results.

I'm told the "pros" use a sheer with a die that matches the corrigations.
The best I could afford would be a treddle opportated squaring sheer and
with our a die, I would get poor results due to flattening by the sheer
blade.

Are there any other methods that I should try.? Perhaps a saw blade for my
skil saw??

Thanks,

Steve

A plasma cutter would do a good job of it.

Pete C.