Snow Guard Install Question

[dantheman8119]

Looking for some feedback as I am planning to install 2 rows of this product on my metal pole barn roof. With my purlins being on edge, this seems like a good solution.

My barn is 30x40 with 2' eves and 8' on center posts

https://snowguarddirect.com/product/microx-snow-guard-25-pack-includes-guards-gaskets-screws/

Wondering if anyone has any thoughts on if I should do the two rows at the red arrows, or the orange arrows? Here's some pictures...

Red would be ~4" and 24" from the metal roof edge. Orange would be 24" and 48" from the metal roof edge

 

[yeldogt]

depends on pitch and snow load

 

[dantheman8119]

Sorry I should have included this too - it's a 4/12 roof, 50# snow load spec

 

[jptbay]

I did 3 rows of the bigger snow guards on my 30x40 3:12 roof.

I did not use the screws and gaskets, as I did not want more screw holes in my roof. Used Surebond SB-190. Been a few years now and still perfect.

https://www.surebond.com/SB-190/

 

[gtsgarage]

I already worry about snow load. Why would you want to trap it up there?

How much snow do you get? My cabin has heavy snow and a metal roof, people have had their roofs compress the entire structure from the snow load.

 

[finn]

Not popular here in the heavy LES belt.

People specify metal roofs so the snow slides off and doesn’t collapse the roof. There were dozens of collapsedpole barn roofs here and within 125 miles south over the last three or so years.

Also, several contractors refused to install them when I inquired, stating that they rip off when the snow eventually let’s loose.

We had a little over 300 inches last year...this year is considerably less severe, so far.

 

[MushCreek]

I'm trying to figure out if I can control the snow coming off of my gambrel roof barn. The upper part is 7/12; the lower part is 12/7. Our (rare) snow is wet, and clings, even to the very steep lower part. When it eventually slides off, it hits the ground so hard you can hear it up at the house. NBD, except I'd like to put a lean-to carport on the side of the barn. I'm afraid the snow coming off of the roof will destroy it. The local roofing supplier sells a continuous rail instead of the individual ones. This past year, I added small roofs over the two man doors. It will be interesting to see what the snow does to them.

 

[Bretny]

I have seen commercial ladder style snow brakes on standing seam metal roof ripped off from snow. My in laws had those plastic ones you posted. They lasted 1 year. We arnt in a high snow area either.

If your putting a metal roof on I would expect to let snow slide off...and you can forget about ever keeping gutter on it. Here we get alot of wet heavy snow with alot of freezing and thawing. Dosnt work out well for people wanting to keep snow on a metal roof.

 

[yeldogt]

Here is the roof on my current project --- if you notice on the Zinc roof there are a series of small blocks clamped to the standing seam -- they use set screws and a bar was attached that runs horizontal across the roof and another one lower over the door overhang.

The slate uses copper triangles ... typically require three rows. I have the gutter to help ... but the idea is to hold the snow in place ... not catch it.

There is no danger of overloading as the roof is designed for the snow load and the metal roof is in contact with the roof deck. On a pole structure in some situations the roof is not supported all the way across.