"Jordan" wrote in message
u...
I'd like to cut corrugated roofing steel, and get a nice clean edge like
from the factory.
All I can manage is a nasty jagged edge, either with snips or angle
grinder. The roof is low, and I don't want the hazardous edge.

Q: Can corrugated sheet be neatly cut by shears/guillotine?


First of all, I'm not sure why you cannot get a clean cut with snips. A
good pair of compound-action snips handled well will cut the material
cleanly. A bit of manipulation is necessary when going up and down the
corregations. But...YMMV

I know of some roofing manufacturers who won't guarantee the corrosion
resistance of their product unless it is cut with bypass tooling of some
type -- something about "wiping" the zinc across the cut, or some such. It
sounds like mouse milk to me, because the amount of zinc you'd transfer must
be only a couple of atoms thick!

I've seen production roofing cutters. They are of the guillotine style with
contours to match the corregations. I never saw an angle cut being done in
the factory, though. For obvious reasons, it would take a different cutter
for each specific angle they'd have to cut.

The guy who built my barn used a diamond blade in a circular saw. The cuts
were nice, and barely burred.

LLoyd