Low-Pitch (3:12) Options

Old 06-06-05, 10:20 AM
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Low-Pitch (3:12) Options

We are about to begin a major project where we will add an addition onto the north side of our house. The addition will be a single story, 12' wide and run along the back of our two-story home. In order to keep the windows on the second floor at the current sizes and locations, we will have to drop the addition a full step, and use a 3:12 pitch roof.

3:12 is obviously below the "comfort zone" of asphalt shingles, so we were considering using standing seam metal roofing. Now we have multiple companies telling us that 3:12 is no problem for asphalt shingles, provided you go through the proper preparations and we have a mix of roofers some who would put shingles there and some who says it is stupid to put shingles on a roof with such a low slope.

Can anyone voice their opinion on what the REAL recommended roof pitch is for asphalt shingles? Will the standing seam perform better?

Here are the particulars on the job:

* House is in Northeast CT, USA. ~50" annual snow, not near the water.
* Roof is 3:12 hipped on North side of house. Covers 12' addition, so roof has ~13-14 ft of run.
* total area is ~10 sq.


Old 06-06-05, 01:54 PM
Join Date: Feb 2005
Location: Colorado
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Metal or shingles would be fine as long as it's covered with a membrane first....and the membrane itself is tie-in with any edge flashings.
Metal could be a longer term alternative though.

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