Roof Framing Overbuild

A roof having an 8 span framed with 2x12 rafters is over framed unless it was done to achieve a specific purpose such as r value.

Roof framing overbuild.

Box beam gable framing new gable overhang is framed in the form of a box beam hanging off of a new layer of roof plywood roof sheathing cantilevered over the top of the 3 layers of rigid insulation. Use 8 penny nails to attach the first 2 in 4 in 5 1 cm 10 2 cm board to the wall studs. Advanced roofs three gable overbuild. 1 8 pitch is given so 24 x 1 8 equals 3 or unit of rise in inches.

Use of rafters trusses and a truss base polyline are demonstrated architectural home design software. Over frame in my mind is to over build something for no apparent reason. Rafters act more like the top chord of a roof truss than as a roof joist. Needed to tie the roof together where the rafters are framed at an angle to each other.

The exposed edges of the 3 layers of rigid insulation are no longer exposed. Line length is the hyptenuse of the triangle whose. A third gable roof is joined to a main roof in an overbuild remodeling situation. First set the new rafters or trusses on the addition walls up to the point of the eave of the main house and snap chalklines on the shingles to mark the center of the new valley.

You can strip the shingles out of the area that the new roof will cover but to be safe i often leave the old shingles in place and frame over them. The function of each component is. A third gable roof is joined to a main roof in an overbuild remodeling situation. Use of rafters trusses and a truss base polyline are demonstrated.

Hip roof framing hip to common to ridge join diagram ply sheathing angle and cut set back both sheet orientations sheathing hip cut calculator hip roof ply cut angle diagram 1138 93 ft 35 6 sheets 5 10 15 waste 40 sheets. Nail 2 boards onto your walls as top plates. When you nail in the second boards offset the seams of the upper and lower layers by at least 24 in 61 cm. Overframe on a set of plans means to build on top of another structure such as has been defined earlier.

If the unit of rise in inches is 3 then the cut is the unit of rise and the unit of run 12 inches or 3 12. Figure 2 2 roof framing terms.