Patio Covers / Shingled
Shingled Patio Covers in Cowlitz and Clark County
This is the cover that reads as part of the house instead of something bolted onto the back of it. It also asks the most of the structure and it is the one the pitch will sometimes refuse to allow.
How I build it
Posts: Pressure-treated 6x6 on standoff post bases.
Footings: Poured concrete piers sized for the added roof weight.
Beam: Glulam or built-up beam, sized for shingle weight plus snow.
Rafters: 2x8 or 2x10 at 16 or 24 inches on center depending on span.
Sheathing: 1/2 inch CDX, full deck.
Underlayment: Per the shingle manufacturer, doubled on low slope.
Roofing: Composition shingle matched to the existing roof.
Wall connection: Step flashing woven into the courses, counterflashed under the siding.
The point of this one is that nobody can tell. Same shingle, same color, same plane where it can be, and from the street the cover looks like it came with the house. On a house you are going to sell, that is worth more than the difference in cost, because a cover that reads as an addition reads as a question.
Pitch is the gate, and it is worth knowing before you fall in love with the idea. Composition shingles have a minimum slope from the manufacturer, and below a certain point they require doubled underlayment, and below that they are not allowed at all. An attached cover has to start under the existing eave and still clear your head at the far end. On a low single-story that math often does not work, and then the honest answer is metal, not shingles installed somewhere they do not belong.
Weight changes the frame. Sheathing, underlayment and shingles are several times what a metal panel weighs, and our ground snow load sits on top of that. The beam gets deeper, the posts carry more, and the footings get bigger. A cover framed for metal and then shingled later is a cover that was never designed for what is on it.
The tie-in is where these fail. Where the new roof meets the wall, step flashing goes in course by course as the shingles go on, with counterflashing behind the siding above it. Where it ties into the existing roof plane instead, you get a valley, and a valley over a patio door is the single most likely place in the whole job to leak. It gets built with the roof, not patched after.
Included
Pressure-treated 6x6 posts and standoff bases
Concrete footings sized for the roof weight
Beam, rafters and full CDX deck
Underlayment and composition shingles matched to the house
Step flashing and counterflashing at the wall
Permit drawings and permit application
Hardware and fasteners
Not included
Concrete patio slab, if there is not one already
Electrical, including fans and lighting
Gutters and downspouts, quoted separately
Repairs to the existing roof where the cover ties in, if any are found
Removal of an existing cover, quoted separately
Want this cover on your patio?
Call for a free estimate, or send photos and get a Project Sketch first. Call (360) 431-9382.