Hi folks,
I know most of you don’t like the flat roofs, but somehow I fell in love with them. I am building (almost to roof sheathing) a wrap around porch on three sides of a 30 by 40 sort of greek revival with an 8/12 pitch. The porch is 9′ deep with a 2′ eve. The pitch is 2/12, 12 inch diameter doric columns 7 to 9 feet apart. The rafters and ceiling joists are 2×6 16 o.c. The rafters sit on top of the ceiling joists on the seat cut (no bird’s mouth just a point) both connections to the building are notched over ledgers. The beam is 2 2x 12s spaced apart with 2x4s, the inside edge of the beam is 98 inches from the wall, but the seat cut on the rafter hits the ceilng joist at 93 inches from plumb cut ledger. my question is….. should I plywood gusset the connection between the rafter and the joist, or solid block? The ceiling and soffit will be t&g beadboard, should I vent it? The roof will be standing seam. I am in burlington vermont for the weather load. Any comments appreciated.
Replies
PL Premium and ply gusset.
Too bad you can't get a 3/12 pitch for this! there would be ways you could shingle it then instead of having t6o use membranes to roof it.
This really is not a flat roof, it is simply a low slope roof, but it is too low of a slope to use shingles on.
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I was under the impression that the standing seam with things like mastic or double crimp were good to less than 1 in 12.
Can be in some circumstances - right prep and climate. I didn't realize this was a standing seam, but I did note Vermont winters which are hard on any roof
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A standing seam porch roof on a Greek Revival is a very nice way to go.
What material is the upper roof? Sometimes falling snow and ice can damage the porch roof if it's slate or metal above.
Burlington area has a lot of slate..
Walter
Indeed, falling snow could be a problem. I went with 50 year dual gray arch shingles. Not the look of slate, but the snow stays on. I have noticed that I use a lot less heat when I have a good snow layer.