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1
- #1
DoubleStud
Structural
- Jul 6, 2022
- 501
I started getting these targeted ads from this company on instagram and facebook. I don't know, it bothers me a lot. So they sell these transparent sheets and they persuade you to put them on top of your pergola. Pergolas in my area do not need an engineer. But as soon as you add roofing material on top and especially connected to the house, you do! Most pergolas people built or bought (costco for example) just sit on slab on grade. The joists probably can't handle the snow load. I hope people are smart enough not to do this in the snow country!

