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Tool Talk Discussion Forum

Cutting metal roofing

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Bill

11-04-2003 19:22:33




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I am putting white metal on sheds and when I cut say up a valley or on the siding cutting along the roof angle the raised areas will flatten and make the piece wider on the end that is cut on. I have Wiss green, red, yellow, and a pair of long handle tin snips all are new. How is the right way to cut this material without flattening? Have seen Amish built buildings and are not this way. I don`t do this for a living but would like a better job. Thanks for any advise.

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John Ne. A Different Way

11-05-2003 20:28:53




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 Re: Cutting metal roofing in reply to Bill, 11-04-2003 19:22:33  
One old way that I've still used recently to cut sheet metal, including ribbed galvanized steel roofing is this, Nail a single nail to a sheet of plywood about halfway down, lay sheet on the ground, tie a piece of eight foot wire to it securely. Lay your sheet to be cut over the plywood, pulling the wire out to the edge, inline with the needed cut. I tie a 2x2 piece of wood to the wire for a handle, then placing a food on each side of the wire, on top the to be cut piece, pull up with the handle using both hands, the wire will cut the sheet metal very nicely, alignment is the critical thing. Does a great job, no metal chips, no noise, and can be done at a building site without power. Saw it done first 40 years ago by an experienced roofer. John in Nebr.

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Jerry A.

11-06-2003 09:01:02




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 Re: Re: Cutting metal roofing in reply to John Ne. A Different Way, 11-05-2003 20:28:53  
What gauge wire would be needed for that?

I presume you pull a little and then move your feet a little and then pull some more (you're pulling up...yes?).

Interesting concept.



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John Ne.

11-06-2003 10:20:50




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 Re: Re: Re: Cutting metal roofing in reply to Jerry A., 11-06-2003 09:01:02  
Thats right, you pull up on the wire, your feet and your weight hold the sheetmetal in place, you continue pulling until you're even with the nail in the plywood, then you pull the wire and plywood back and go again, can cut a ten foot piece of galvanized tin lengthwise in about 4 minutes after setting up, plus there is no metal shavings in the yard. A board can also be used instead of a piece of plywood. The wire is the cutter, and the more you cut the more it stretches and gets very hard, will snap eventually but used baling wire around here is pretty cheap. The hard part is keeping the cut going the right way, but you're going slow and watching as you cut, so quick corrections can be made. John in Nebraska

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Carol Martin

11-05-2003 16:38:58




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 Re: Cutting metal roofing in reply to Bill, 11-04-2003 19:22:33  
I Built a 30X50 Barn a couple years ago from Insulated steel door panels..(The piece cut out for windows.).These were approx 36X22" panels. I had to cut thru one thickness on three sides to make them over lap and fit between studs.. I figured it out one day and I cut a little over 2 Miles of this heavy steel. I used a (bunch) of plywood blades in backwards on a 10" table saw. I think I probably used about 20 Blades.. They do Work Great to cut sheet metal.. I bought a regular sheet metal blade and that worked terrible.. The barn Came out beautiful but it was a lot of work but I had the time and did not have to rush..

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Dusty

11-05-2003 07:55:37




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 Re: Cutting metal roofing in reply to Bill, 11-04-2003 19:22:33  
I tried the skill saw put prefered my power nibler.
Dusty



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Timbersavage

11-04-2003 20:59:34




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 Re: Cutting metal roofing in reply to Bill, 11-04-2003 19:22:33  
Im sure OSHA wouldnt approve but I cut my steel roofing using a skilsaw with a fine tooth paneling blade put on backwards.. works fine but warning,,, WEAR eye and ear protection!!! Good Luck



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big fred

11-05-2003 12:00:37




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 Re: Re: Cutting metal roofing in reply to Timbersavage, 11-04-2003 20:59:34  
Ditto, except I'd suggest a full face shield if you got one. Wife doesn't like gettin' metal splinters in her lips when she kisses me. On second thought, forget the full face shield, you shouldn't be kissin' my wife anyhow.



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toolman

11-04-2003 21:03:55




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 Re: Re: Cutting metal roofing in reply to Timbersavage, 11-04-2003 20:59:34  
i do what timbersavage does , use an ole plywood blade on backwards, should have eye protection, wear gloves be careful, works good an is fast.



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BB

11-05-2003 04:37:42




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 Re: Re: Re: Cutting metal roofing in reply to toolman, 11-04-2003 21:03:55  
I am with the other guys except that I bought a blade for my circular saw that was made specifically to cut sheet metal. Had little slots rather than teeth. I used it when putting up a 30'x40' metal building. But like the others said, eye and ear protection. It is loud and the metal chips fly.



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jake

11-05-2003 04:50:33




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 Re: Re: Re: Re: Cutting metal roofing in reply to BB, 11-05-2003 04:37:42  
I use a metal cutoff wheel made for skilsaws availabe at any hardware store. These are abrasive wheels are quick and cheap also need protection as the others do.



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mj

11-05-2003 15:45:37




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 Re: Re: Re: Re: Re: Cutting metal roofing in reply to jake, 11-05-2003 04:50:33  
Ditto on the abrasive wheel and the Skilsaw.



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Dave

11-05-2003 07:56:07




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 Re: Re: Re: Re: Re: Cutting metal roofing in reply to jake, 11-05-2003 04:50:33  
I worked for a pole buiding contractor for a few months and he was able to rent or use a large hand operated shear to cut the panels. The blades were made to match the profile of the steel. Worked great! The building supplier had the shear.



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Dave

11-05-2003 07:51:29




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 Re: Re: Re: Re: Re: Cutting metal roofing in reply to jake, 11-05-2003 04:50:33  
I worked for a pole buiding contractor for a few months and he was able to rent or use a large hand operated shear to cut the panels. The blades were made to match the profile of the steel. Worked great! The building supplier had the shear.



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Chris Brown

11-05-2003 16:26:40




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 Re: Re: Re: Re: Re: Re: Cutting metal roofing in reply to Dave, 11-05-2003 07:51:29  
I just finished my building and the people I bought my tin from loaned me the shear to cut it with.it makes perfect ends. I would figure they would rent it at most metal roofing places. I also bought an air powered nibbler/shear from harbor freight to make lengthwise cuts $40 cheap.
A good investment in my opinion.(nibbler wont go crossways over the bumps)



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jb

11-05-2003 16:07:50




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 Re: Re: Re: Re: Re: Re: Cutting metal roofing in reply to Dave, 11-05-2003 07:51:29  
howdy, just roofed a bulding and cut the sheets using a circular saw with a abrasive blade. Another way is to turn a regular blade around backwards however this throws sparks bad. Dont forget to use safety glasses. jb



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