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  #1  
Old 11-06-2013, 09:48 PM
~smokey~ ~smokey~ is offline
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Default Cutting sheet metal roofing ?

I picked up some used metal roofing and would like to know how to cut it to shorter lengths, I'm wondering if I can use a circular saw and what type of blade should I use ?
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  #2  
Old 11-07-2013, 03:19 AM
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I never worked with this (yet) but I would think that if you placed the bottom side up so you'd be cutting on the flat plane of the sheet and clamped the pieces down you should be alright. I couldn't imagine cutting these all with snips?

But maybe a pro can chime in here because that's just my thinking?

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Old 11-08-2013, 12:40 AM
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Fiber blades will cut it. Be aware the fall out is hot and can ignite things under the saw. I don't recommend doing this work on an unprotected roof of any type.

If you are using .027 aluminum or lighter material - like soffit - an old trick is to take you conventional wood blade and turnit around. You'll get a nice cut.
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Old 11-08-2013, 04:29 PM
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Get your self a gas powered chopsaw. It rips thru it like butter. It's metal decking that your cutting.
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Old 11-10-2013, 08:20 PM
metalmanmania metalmanmania is offline
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Heaven for bid please don't cut it with ANY type of abrasive blade!!! That worked great in the 80s before circular saw blade technology caught up with the times. You can use a circular saw and you have two options. #1 use a fine tooth plywood blade turned backwards and put on eat plugs and a face shield trust me you will need it. Flip the panels upside down you will only be able to cut a few at a time. Clamp them together with vice grips and go to work on it. #2 buy a metal cutting blade and do the same as above. It is worth the money trust me. It will leave a almost burless edge unlike the chop saw, and on these roofing panels no burr means it won't rust. Trust me on the new blade and the protection. It with throw chunks at you that will feel like bbs hitting you, I have seen these blades cut into the fork on a fork lift they are no joke
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Old 11-11-2013, 08:10 AM
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The fiber blade is $5-8

The metal cutting blades range $50-120 or higher

Both leave pretty smooth cuts, but the cost is much higher for the latter.

I'd also warn against lending out a metal carbide diamond tipped blade. People think they'll cut about anything and then return it after they find what it doesn't cut... Just saying.
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Old 11-11-2013, 10:29 PM
~smokey~ ~smokey~ is offline
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Thanks for your input everyone, good point to flip the sheet over and cut on the smoother side, I think I'll pick up a 7" fine tooth plywood blade and run it backwards it'll probably give the least amount of shraptnel.
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Old 11-19-2013, 08:00 PM
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plywood blade best bet. cutting painted metal roofing with abrasive blades voids coating warranty on all brands i have used, same for sheet stock.
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Old 11-19-2013, 10:05 PM
Starwars Starwars is offline
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profile nibblers will cut through that in no time
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Old 11-20-2013, 02:32 PM
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The ribs jam up the jaws on nibblers if those are heavy gauge. The advantage of a saw is you can cut a stack. I never had trouble with the larger teeth blades. Let us know if you compare fine versus large tooth blades. Don't forget to install it rear facing!
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