Minimum Pitch For Metal Roofing

 
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Old 01-19-2006, 04:40 PM   #1
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Minimum Pitch For Metal Roofing


Well I guess the title says it all, but (as you may have guessed), I need to know how low of a pitch I can get away with and use metal roofing. Thanks in Adv.
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Old 01-19-2006, 05:01 PM   #2
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Re: Minimum Pitch For Metal Roofing


I think it is like 3 or 4" shingles is 4 1/2" around here and i know you can pitch metal roof less

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Old 01-19-2006, 05:36 PM   #3
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Re: Minimum Pitch For Metal Roofing


I can put a metal roof locked and soldered seams on any pitch.
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Old 01-19-2006, 05:43 PM   #4
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Re: Minimum Pitch For Metal Roofing


This picture is the stuff I'm thinking of. Are you saying that I'll have to solder the seams on ANY metal roofing, or is that dependant on the pitch?
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Old 01-19-2006, 07:51 PM   #5
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Re: Minimum Pitch For Metal Roofing


Technically, here, it's 3-12 for residential. I have a permit app. in for a small garage that is 1-12 with GIWS and am pretty sure that it will pass.
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Old 01-19-2006, 08:57 PM   #6
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Re: Minimum Pitch For Metal Roofing


Typically, no soldered seams for that roof.

My point was that a metal roof can go on almost any pitch. I do not know about dead level though.
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Old 01-19-2006, 09:23 PM   #7
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Re: Minimum Pitch For Metal Roofing


Ok so it's based on pitch, at least to some extent...so at what pitch would I want to start/stop soldering joints?

3/12 solder...4/12 don't

6/12 do...8/12 don't

what's the magic cut-off line?
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Old 01-19-2006, 11:26 PM   #8
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Re: Minimum Pitch For Metal Roofing


That is a sharp metal roof in the Pic. I sitting here wondering how much that cost? I have no ideal so i will guess 20,000-30,000. Am i in the game?
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Old 01-20-2006, 01:15 AM   #9
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Re: Minimum Pitch For Metal Roofing


I guess I shoulda said this before: That roof isn't my work or my house or anyone I know. First picture under the first link on the search for "metal roofing"...just so I could have a picture of what I was talking about

So I have no idea 747...sorry.
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Old 01-20-2006, 06:14 AM   #10
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Re: Minimum Pitch For Metal Roofing


I would say 3/12 is safe without a slderd lockseam systyem.
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Old 01-20-2006, 11:17 AM   #11
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Re: Minimum Pitch For Metal Roofing


Quote:
Originally Posted by AaronB.
I can put a metal roof locked and soldered seams on any pitch.
Yup! Flat seam copper locked and soldered is a great, yet very expensive, flat roof system.
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Old 01-20-2006, 02:51 PM   #12
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Re: Minimum Pitch For Metal Roofing


The minimum slope depends on the exact system and profile. There are "low-slope" profiles with hidden fasteners, that can go as low a 1:12 without using solding. However, steep-slope materials go down only to 3:12.
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Old 01-20-2006, 06:14 PM   #13
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Re: Minimum Pitch For Metal Roofing


stupid question here but what exactly does the term 1 to12 or 3 to 12 mean......... is it safe for me to assume (rule #1 never assume) that it is the same as when determining slope of a hill or grade change??? or is it different terminology 1 to 12 seems really steep to me if that is the same thing....... is this true or an i assuming too much?
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Old 01-20-2006, 06:37 PM   #14
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Re: Minimum Pitch For Metal Roofing


Quote:
Originally Posted by i_plant_art
stupid question here but what exactly does the term 1 to12 or 3 to 12 mean......... is it safe for me to assume (rule #1 never assume) that it is the same as when determining slope of a hill or grade change??? or is it different terminology 1 to 12 seems really steep to me if that is the same thing....... is this true or an i assuming too much?

it's the pitch of the roof. If it is 12/12 that means 12" over and 12" up, which makes a right triangle and= a 45 degree angle...

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Old 01-20-2006, 07:19 PM   #15
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Re: Minimum Pitch For Metal Roofing


I think that something is being missed here. I don't know if I would recommend GIWS for a perfectly flat roof but for any pitch, it is what is doing the job. Whatever you install over it merely protects the underlay from the ravages of wind and weather.
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Old 01-21-2006, 12:57 PM   #16
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Re: Minimum Pitch For Metal Roofing


I've never done large scale metal roofs. We do quit a bit of bay's and porches etc... IN these cases it just makes sense for us to ice shield the whole thing rather than messing around with ice shield and felt. In addition you should place a seperation barrier between the ice shield and metal, usually a rosin paper, like they use for protecting flooring on construction sites. This seperation barrier is especially necessary if you are using granulated ice shield of any kind.
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Old 01-21-2006, 03:16 PM   #17
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Re: Minimum Pitch For Metal Roofing


I say that the real metal roofs do not need the underlay, but today's craftsmanship does. many years of standing seam metal were installed without bituthane, but a lot more work was involved. Today's metal systems are more of a remedial process to cut labor costs.
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Old 01-30-2006, 07:15 PM   #18
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Re: Minimum Pitch For Metal Roofing


Last year I did (as GC) a 30,000 sf superstore roof that was an Ultradeck Standing Seam on a 1/4 in 12 pitch. I'm now doing a 12,000 sf single slope office with 1/12 pitch. the owner would like the canopy to have a tile roof look, out of metal - anyone out there have budget pricing info for this product? How about you Teetorbilt - using this product at the beach?????????
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Old 02-08-2006, 04:27 PM   #19
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Re: Minimum Pitch For Metal Roofing


Quote:
Originally Posted by jproffer
This picture is the stuff I'm thinking of. Are you saying that I'll have to solder the seams on ANY metal roofing, or is that dependant on the pitch?
why would you want to solder the laps in the picture , you shouldn't have any laps except for ridge flashing, aprons etc. The house you are showing me looks like a peterson panel , just measure the true length of the panel for each side of the roof and call it in to peterson aluminium, they run it off you as rrequested, done just like that, the top goes under the reciever which you would have to fabricate and the bottom hooks on the apron which also have to make, caulk the reciever lay the panel down ,install the clips, notch the panel on the clip so it doesn't slide down, done on to the next one, only soldering We ever do is on cooper that you should solder on a barrel roof etc., Thats how we do it in the Arictechural Sheet metal buisness. Any other problems or questions feel free to ask, leo

Last edited by Snl; 02-08-2006 at 04:32 PM.
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Old 02-08-2006, 06:27 PM   #20
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Re: Minimum Pitch For Metal Roofing


Jess, I'm not a roofer, just did a ton of research prior to having my house re-roofed. Anything metal too close to beach would not be recommended, the sand blasts off the finish and the salt finishes the destruction.

Here, it usually faux Spanish tile over hot mop, metal panels screwed down over a peel & stick or arch. shingles on the low end.

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