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TOPIC: Installation

Selection and Install for my barn

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Hello,
We will be installing a metal roof on our barn we are building, acting as our own GC and roofer...

8:12 pitch with two shed dormers that are 4:12, substrate is 3/4 inch plywood, Grace Water and Ice HT, and three velux skylight penetrations. Central California, no snow loads, moderate winds at times, hot summers.

Size of building foot print is 24x36...

Questions:
Looking at standing seam, hidden fastener products, 24 gauge...

1) Any reason other than aesthetics and install hours to choose 12" vs 16" vs 18"? The skylights are spaced different distances from each other...

2) The other two metal roofs I have installed on smaller projects we used the system where you screw down a cleat every 48 inches or so and the panels snap into it. I see that a number of products don't use a cleat but secure the roof panel directly through spaced screw holes factory placed in the panel itself. Is the cleat system generally considered "better"? Or am I just incurring costs I don't need to by using cleats?

Ok, thanks for taking a look at my questions, I appreciate any feedback...

Mike

barn1.jpg

barn 2.jpg

Mike S

2/21/2021
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Thank you. The 12" panels may be less likely to show oil canning. That said, the wider panels may be helpful at not having situations where you're trying to direct water down very narrow areas alongside the skylights. Not having a lot of rafter length above the skylights is helpful though. As far as the "cleat" systems you mentioned, I believe you are comparing "clipped" panels to "nail hem" panels. The clipped panels allow for greater thermal movement. However, your panel lengths are not terribly long so a "nail hem" panel should be fine.

Todd Miller
Todd Miller
Isaiah Industries, Inc.

2/21/2021
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