I have the structure for a covered patio which measures 17' x 12' is substantially complete. The structure is built with 2"x6"x12' stringers attached to the house with joist hangers on a 2"x8"x16' ledger secured with 3/8"x5" lag bolts sunk into the wall studs. Perpendicular to the stringers, which are set 24" o.c., is 1"x8" tongue & groove (T&G). The T&G will be covered with 1/2" plywood fastened to the stringers with 2 1/2" headed nails.
Next comes the roofing. But a question concerning the plywood nailing schedule. Would it be necessary or wise to nail the plywood to the T&G between the stringers using 1" roofing nails? Or, is the longer nails every 24" in the stringers sufficient?
The roofing material is rolled roofing over a layer of 30# felt. Since this is So. California, I don't have to worry about load and the Santa Ana winds are not a problem here. Rainfall is normally about 10" per year (last year we only got 3" all year).
Any suggestions or hints about laying rolled roofing? Is it as simple as starting at the roof edge and overlapping the material until you get to where the roof meets the house? Does the drip edge go under the felt? What is the overlap of the felt and the rolled roofing. Do you start your first course of felt using a 1/2 wide length of felt? What is the nailing schedule for the felt? Any suggestions would be appreciated.
By the way, I built a 2 1/2" fall or slope on the 12' side and a 3" fall in the 17' direction. A little bit too much, I think.