We multiply the roof length c which is the sum of building length plus the gable end overhangs of the roof by the roof width of slope a that we just figured out above when we computed the hypotenuse of the roof triangle that s why we needed the roof rise number.
Gable roof width.
Measure 24 in 61 cm from the ends of one of your top plate and mark each measurement with a pencil.
Use the saltbox roof to calculate a two sided roof with different slopes spans and or overhangs for each side of the roof.
Online gable roof calculator kalk pro.
Gable roof framing calculator plan diagram with full dimensions for a good straight fascia add an extra inch or 2 to the tails of all your rafters total length.
Gable roof a gable roof has two opposite sides with equal slopes and equal spans that meet in the center of the roof at the ridge.
Make sure the edges are flush with the outside of the top plates.
Calculate your ideal roof right now it s free.
3 3 6 6 rows of 7 7 15 4 sheet width.
Roof boarding volume 0 67 1 34 cubic m.
Underroofing material asphalt felt roofing felt 40 8 81 6 sqare m.
Or 29 97 59 94 pieces of 6 m.
Rafter templates birdsmouth hap etc.
The roof area ra is calculated easily.
After they re up you can snap a line to mark and trim the tails in a nice straight line to make up for any ridge warp or marking cutting and fixing errors.