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  #1  
Old 09-11-2011, 12:00 AM
Guttermonkey Guttermonkey is offline
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Default bay window roofs

Here's a couple bay window roofs we did about a month ago. I did another last week and the homeowner didn't like that the ribs had so many crimp marks so I'm having some battens machined up to fit over. Hrmm.
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  #2  
Old 01-16-2012, 08:25 AM
roofermarc roofermarc is offline
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Quote:
Originally Posted by Guttermonkey View Post
Here's a couple bay window roofs we did about a month ago. I did another last week and the homeowner didn't like that the ribs had so many crimp marks so I'm having some battens machined up to fit over. Hrmm.
I wonder who ever came up with this style of hood roof. If I get my distance up and distance out, scribe a radius or curve, step off the curve in equal distances, draw a 22 1/2 % line and plot the points onto the s/o, I'm left with my pattern that is narrower at the top and wider at the bottom. The technique displayed here had to be done to skip the layout process. Not trying to bad mouth anybody's work, but I just don't think its right. Here,s another pic of what I'm talking about. To the untrained eye it would go unnoticed.
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Old 01-16-2012, 08:54 AM
Guttermonkey Guttermonkey is offline
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Hey, Can you explain in a little more detail? We do a bunch of these and I like to hear how other people are doing them.

Thanks,

John
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Old 01-20-2012, 06:03 PM
smwlocal24 smwlocal24 is offline
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Quote:
Originally Posted by roofermarc View Post
I wonder who ever came up with this style of hood roof. If I get my distance up and distance out, scribe a radius or curve, step off the curve in equal distances, draw a 22 1/2 % line and plot the points onto the s/o, I'm left with my pattern that is narrower at the top and wider at the bottom. The technique displayed here had to be done to skip the layout process. Not trying to bad mouth anybody's work, but I just don't think its right. Here,s another pic of what I'm talking about. To the untrained eye it would go unnoticed.
There would still be about the same amount of layout; the layout is just different. This other style would require the middle section's curvature to be elliptical and the curvature of the corner sections would have to be circular. With this other style the total mitre angle is "cut" into the corner sections' hip panels.

With the style you prefer, all three sections are circular curves and the mitre angle is split between the hip panels of the corner and middle sections. I too prefer the same style you do because it looks better when all the sections have the same curvature. However we usually don't get to build the structures we work on which pretty much governs what type of layout is required.
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Old 01-21-2012, 06:30 AM
roofermarc roofermarc is offline
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Default sweep roofs

These roofs are hollow, there not framed.
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Old 01-21-2012, 09:05 AM
smwlocal24 smwlocal24 is offline
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Originally Posted by roofermarc View Post
These roofs are hollow, there not framed.
Oh, well then I suppose a guy could do whatever he wanted to do. The ones that I have done were always framed and sheeted, and were re-roofs so I would have to select curvatures that would work out with the existing structure and I would have to install flashings that would cover up any previous bad cuts into the bricks and mortar. It would certainly be easier to build a freestanding roof without having to worry about the extra constraints of a roof structure. By looking at the pictures of Guttermonkey's roofs, you can tell that his roofs had a structure to match up to as well; the one picture has the last panel missing and you can see the structure below with rosin paper on it.
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  #7  
Old 01-22-2012, 10:07 AM
roofermarc roofermarc is offline
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Yeah, I see that rosin paper and the deck now, and we were told yrs. ago not to use rosin under copper! I forgot why though. You would have no layout on these as you have the measurements given to you already, just add a little to make sure it would fit over. Actually a real time saver and a more solid and waterproofing means. I like the frame technique now.
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Old 01-15-2015, 02:41 PM
cactassdupree cactassdupree is offline
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Quote:
Originally Posted by roofermarc View Post
These roofs are hollow, there not framed.
What if down the road Someone who doesn't know they are hollow is up there trying to clean the windows and put a little weight (not even walk all over them. You'd have some splainnin to do! I've seen Radius Dormer Louvers on some houses that a roofer or A/C guy has used them to set a tool box or a butt and end up with a nice dent. Those vents can be pushed out from the attic if you can get to them. Those copper roofs over the Bay Windows ought to have a sound backing. Just my 2 cents. dupree
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Old 07-05-2016, 07:55 AM
artguymark60 artguymark60 is offline
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Quote:
Originally Posted by roofermarc View Post
I wonder who ever came up with this style of hood roof. If I get my distance up and distance out, scribe a radius or curve, step off the curve in equal distances, draw a 22 1/2 % line and plot the points onto the s/o, I'm left with my pattern that is narrower at the top and wider at the bottom. The technique displayed here had to be done to skip the layout process. Not trying to bad mouth anybody's work, but I just don't think its right. Here,s another pic of what I'm talking about. To the untrained eye it would go unnoticed.
I would go to the job, site measure the bay, bow or box window nailer (2x8 framing cap) and get accurate angle degrees to the wall. Elevation and design were agreed upon with client. Then I'd take my measurements to the shop, draft a 1" to 1' scale parallel line development on paper choosing always a 9' radius for the concave pans. The 9'radius seemed the most graceful. Using my architect scale, I'd develop my patterns on to the metal, form the pieces in the shop and assemble it on a jig. Basically, in the field I'd place it atop the window after installing a continuous cleat under a 1.5 to 2 inch edge.
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Old 07-05-2016, 08:24 AM
artguymark60 artguymark60 is offline
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Regarding a properly decked bay window:many times the GC or homeowner doesn't want to go to the extra expense to construct a secure substrate. As a tinnmen it is always a joy to do a full blown double standing seam cover over a bay window.
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