For roofs that will experience heavy snow or wind and will span the same distance use 2 6 rafters.
Roofing with 2x4.
Sometimes the rafter will have a tail and extend out past the wall so that you have a soffit or overhang.
For roofs that won t experience heavy snow loads a gable roof can span up to 22 with 2 4 rafters.
Rafters to 2x4 with joist hangers.
I told him plywood and asphalt shingles would be too heavy.
The roofing is manufactured in panels that.
He says lowes told him he could use 2x4 for rafters with 1 2 inches plywood for asphalt shingles.
A stick framed roof uses 2x4 s or 2x6 s or whatever you are framing with but has a ridge board running down the middle ridge line.
Front and sides will sit on deck on a 2x4 wall with studs 24 oc and screened in.
Tin roofing also known as metal roofing is considered more durable than composition or wood shingles.
You then have rafters running down from this ridge board and resting on the top wall plates.
He s already got the 2x4 up for rafters and it s ready for laying plywood tomorrow.
The back of the roof will attach to house with 16 2x4 and lag screws.
The rafters are 18 foot long without beams or trusses garage 28x40.