So my friend has a 20 x 20 roof deck that is laid on top of a concrete roof. The rood is pitched an there is drainage at the corner. The current deck is about 8 years old and is curling, splitting and ...
Building a simple cabin 20 x 30 feet single story with gable roof. What size should the ceiling joists and roof rafters be? Roof rafters run across the 20' span.