Hi KIm, here' the way Cliff did ours. The brackets mount to the beams that hold up the roof. We used to have
it mounted to the roof, but when we put a new roof on the house a few years ago, Cliff didn't want to re-install
the Pergola the same way.
Here is the drawing of how he did it.
I'll post the directions next.
Cliff used 2 pieces of 3/4
inch plywood sandwiched between 2 pieces of 5/4 cedar ...The brackets are a little over 3 1/2" wide.
They are just stained with diluted semi-transparent redwood stain (Behrs)
The siding and plywood on the eves was removed and the brackets were bolted to both the rafters that support the roof and the wood that goes around the house that supports the rafters. He hung from each one to test the strength.
The brackets were scribed to fit around the gutters and also to hold the 2x8 that the 2 x 6 Beams sit on.
Except for the brackets the rest of the wood is Redwood. He built the original deck in 1972 and the Pergola a couple of years later.
Redwood today is extremely expensive and hard to get here on Long Island...But it sure can stand the test of time.