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Reasons To Build Roofs Over 4/12 Pitch? (more Dangerous)

 
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Old 12-23-2018, 12:23 PM   #41
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Re: Reasons To Build Roofs Over 4/12 Pitch? (more Dangerous)


" However, in general terms, low slope roofs (commercial roofs) are those below 2/12 or 3/12 while steep slope roofing would consists of roof pitches above either 2/12 or 3/12 and higher."

Flat Roof: 2:12
Low Slope: 2:12-4:12
Conventional Slope Roof: 4:12-9:12
Higher Slopes: 9:12 - 20:12
Steep Slope: 21:12 and higher

"Steep slope roofing also generally lasts longer than low slope roofing because the systems shed water much more efficiently and generally are subject to less direct U/V activity." - Certainteed
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Old 12-23-2018, 01:04 PM   #42
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Re: Reasons To Build Roofs Over 4/12 Pitch? (more Dangerous)


Quote:
Originally Posted by hdavis View Post
See installation instructions for steep pitches, you have to add nails and roofing cement.
I thought that was so they don't sag down due to gravity (asphalt/fiberglass). Cedar shingles last far longer on sidewall than on a roof.
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Old 12-23-2018, 01:36 PM   #43
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Re: Reasons To Build Roofs Over 4/12 Pitch? (more Dangerous)


Walls are completely different, there are houses aroung here that still have stuff that looks like msr roll roofing with a pattern on the walls. It was put up at least 60 years ago. The houses have probably 12 inch eave overhangs. I'm not saying it's in great condition, but it's still on the wall and still has granules.
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Old 12-23-2018, 02:08 PM   #44
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Re: Reasons To Build Roofs Over 4/12 Pitch? (more Dangerous)


Landmark installation, goo the edges down.

STEEP SLOPE
Use six nails and four spots of asphalt roofing cement for every full
laminated shingle. See below. Asphalt roofing cement should meet
ASTM D 4586 Type II. Apply 1" spots of asphalt roofing cement under
each corner and at about 12" to 13" in from each edg
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Old 12-23-2018, 03:43 PM   #45
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Re: Reasons To Build Roofs Over 4/12 Pitch? (more Dangerous)


Quote:
Originally Posted by hdavis View Post
Walls are completely different, there are houses aroung here that still have stuff that looks like msr roll roofing with a pattern on the walls. It was put up at least 60 years ago. The houses have probably 12 inch eave overhangs. I'm not saying it's in great condition, but it's still on the wall and still has granules.
I was gonna get around to mentioning Insul-Brick eventually.
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Old 12-23-2018, 04:29 PM   #46
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Re: Reasons To Build Roofs Over 4/12 Pitch? (more Dangerous)


Quote:
Originally Posted by SmallTownGuy View Post
I was gonna get around to mentioning Insul-Brick eventually.
Lasts forever, but the downside is it looks like something or other.
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Old 12-23-2018, 06:25 PM   #47
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Re: Reasons To Build Roofs Over 4/12 Pitch? (more Dangerous)


Many homes out here just have a 1/4" to the foot fall. They usually get TPO. very common in areas where ocean veiws are important.


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Old 12-23-2018, 10:21 PM   #48
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Re: Reasons To Build Roofs Over 4/12 Pitch? (more Dangerous)


Quote:
Originally Posted by Californiadecks View Post
Many homes out here just have a 1/4" to the foot fall. They usually get TPO. very common in areas where ocean veiws are important.


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I've seen that with height restrictions.
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Old 12-24-2018, 05:02 AM   #49
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Re: Reasons To Build Roofs Over 4/12 Pitch? (more Dangerous)


Quote:
Originally Posted by hdavis View Post
I've seen that with height restrictions.
the mobile home look
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Old 12-24-2018, 08:19 AM   #50
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Re: Reasons To Build Roofs Over 4/12 Pitch? (more Dangerous)


We have a mean hieght of 35 ft so every cape they add a level to needs a lower pitch roof to maximize the second floor ceiling hieght
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Old 12-24-2018, 09:24 AM   #51
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Re: Reasons To Build Roofs Over 4/12 Pitch? (more Dangerous)


Quote:
Originally Posted by SmallTownGuy View Post
the mobile home look
I suppose they could add style by going with a mansard roof...

That wouldn't really look right on a lot of buildings.
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Old 12-24-2018, 09:29 AM   #52
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Re: Reasons To Build Roofs Over 4/12 Pitch? (more Dangerous)


Funkiest roof I know is on a trapezoidal building. The roof eas built by a boat builder, so the ridge is level, and the pitche changes end to end.

You can't snap a line on it....
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Old 12-24-2018, 12:28 PM   #53
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Re: Reasons To Build Roofs Over 4/12 Pitch? (more Dangerous)


Quote:
Originally Posted by hdavis View Post
Funkiest roof I know is on a trapezoidal building. The roof eas built by a boat builder, so the ridge is level, and the pitche changes end to end.

You can't snap a line on it....
like Noah's Ark - but capsized?

interesting
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Old 12-24-2018, 01:05 PM   #54
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Re: Reasons To Build Roofs Over 4/12 Pitch? (more Dangerous)


Quote:
Originally Posted by SmallTownGuy View Post
like Noah's Ark - but capsized?

interesting
Exactly.
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Old 12-24-2018, 01:50 PM   #55
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Re: Reasons To Build Roofs Over 4/12 Pitch? (more Dangerous)


Quote:
Originally Posted by SmallTownGuy View Post
the mobile home look


Multi million dollar homes on the ocean look. In fact there's many glass and beam homes in those areas.


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Old 12-24-2018, 02:04 PM   #56
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Re: Reasons To Build Roofs Over 4/12 Pitch? (more Dangerous)


Quote:
Originally Posted by Californiadecks View Post
Multi million dollar homes on the ocean look. In fact there's many glass and beam homes in those areas.


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Old 12-24-2018, 02:35 PM   #57
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Re: Reasons To Build Roofs Over 4/12 Pitch? (more Dangerous)


The storage building complex I am presently building has 1/4:12 pitch on the buildings. Being these buildings are "plug and play" kits, there isn't room for sloppy concrete work. We've needed to fur out whole roof structures in order to eliminate the pond that got transferred to the roof from a poor concrete pour.

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Old 12-24-2018, 03:32 PM   #58
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Re: Reasons To Build Roofs Over 4/12 Pitch? (more Dangerous)


6/12 is not steep.
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Old 12-24-2018, 03:38 PM   #59
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Re: Reasons To Build Roofs Over 4/12 Pitch? (more Dangerous)


Quote:
Originally Posted by NYgutterguy View Post
I consider my 4/12 the Ford Fiesta of the world. I hold my head in shame every time I pull up.



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Need a couple dormers up there
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Old 12-24-2018, 03:40 PM   #60
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Re: Reasons To Build Roofs Over 4/12 Pitch? (more Dangerous)


Quote:
Originally Posted by hdavis View Post
See installation instructions for steep pitches, you have to add nails and roofing cement.
Thats for the weight

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