How To Cut In Gable Roof To Existing Roof

Attaching below the ridge.

How to cut in gable roof to existing roof. After the addition roof is framed and sheathed snap a line on the existing roof shingles 2 in. Creating a small triangular extension of the existing roof. In the case of a lean to roof over an addition the existing rafters will have to be cut away to accommodate the addition and the shed roof will require support where. Measure about 7 8 inch 22 mm from the end of your rafter using your framing square.

Line up your framing square again to make a triangle with the mark. Roofs are basically five types. Now comes the really really big point. Use a tape measure to measure the entire width of your building.

Finally cut slots in the underside of each rafter flush against the wall with a saws all. The 6 inches of rigid insulation added to the top of the existing roof deck needed to be done in a manner that was invisible. We cut the rafters to length on the porch. Shed gable hip gambrel and mansard.

Another common design in the northeast is the saltbox which is a gable roof with one longer side. The gable roof on the porch addition was framed with a dropped structural ridge supporting the common rafters above. Up from the valley center and cut through the shingles and underlayment. Gable end detail overhang cut and then rebuilt to hide the thickness of the over roofing rigid insulation.

Make a seat cut on the end of your rafter so it lays flat on your top plate. Before you start cutting you first need to determine how long your roof rafters need to be and the angles at which you ll cut the top and bottom of the rafter. The roofing cement will resist possible leaks overnight. Once new trusses are secured sheath the roof with oriented strand board osb lay down roofing paper then nail on shingles.

Next cut out slots in rafters so a 2 x 4 will sit flush with it on the cap plate. Then add siding and trim to the new gable roof end. The easiest way to tie in the new shingles with the old is with a cut valley see four ways to shingle a valley. Cut the small triangle out with a hand saw or circular saw.

Continue to measure 2 x 4 s to allow nailing at each truss until you reach the end of your roof and add the additional 6 inches and 1 1 2 inches for that end. Then install new ridge board tying it to the old roof by cutting back part of the original ridge board so there is overlap. Install metal drip edge at the eaves.