how to attach a pergola to a roof

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Old 06-11-11, 11:40 AM
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how to attach a pergola to a roof

How do I attach a pergola to a roof that will be covered with shingles. I have seen brackets used, 2x6 weatherbond broads used and thus angling the rafters and then attaching?
 
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Old 06-11-11, 11:57 AM
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Depends on the height of the pergola roof. Will it be higher than the fascia, or at the same height as the fascia? Will it/can it extend over the top of the roof, (such as when the roof ends directly above the exterior wall) or not?
 
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Old 06-12-11, 06:20 AM
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Yes it is higher than the fascia. Yes it can extend over the top of the roof. it is going at a point over the current patio roof area extending outword 14 feet onto our pool concrete deck. the total pergola area is 14 x 24 built with cedar. Here in texas many roofs are very angled.
 
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Old 06-13-11, 08:56 PM
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They make brackets that stand off from the roof... here is one, that could be adapted to work. It's designed for satellite dishes, but if you had 3 or 4 of them, they could also be adapted as an attachment point for your pergola roof by screwing or bolting a ledger to them. Keeping the ledger a couple inches off the roof would allow water to continue down the roof.

http://manuals.solidsignal.com/Retrodeck%20Brochure.pdf

If you want a low tech solution, a few galvanized angle irons bolted to the roof would provide something you could bolt onto the side of. But you'd want to seal them down good. Satellite companies have a thick self-sealing gasket that goes under such things so that the fasteners (usually lag screws) don't cause the roof to leak.
 
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Old 06-14-11, 06:43 AM
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Assuming that your house roof is comp. (shingles), the 1/8" X 1" X either 10" or 12" angle brackets work, as long as you get them sealed. Use one on every rafter or truss of the house roof. Once they are bolted in place, you can bend them to the desired angle, then attach your ledger for the pergola.

Using comp. for the pergola roof works as long as you have enough slope -- 2-1/2 in12 min. Any less slope than that, I would use metal roofing.
 
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