Tying Gable Roof Into Existing Roof

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Tying gable roof into existing roof.

The gable roof on the porch addition was framed with a dropped structural ridge supporting the common rafters above. Continue reading below our video of the day. Creating a small triangular extension of the existing roof. Called tying in this helps to weatherproof and strengthen the joint.

Then mount new trusses on the new addition walls. The gable rafters on either side of the shed roof are doubled and short cripple rafters run between the header and the ridge above it. The angle is then cut and the blind valley fastened into place. Starting two courses higher than where the new ridge meets the old roof unseal the shingle tabs a thin flat bar or a joint taping knife works well and pop the nails of the overlying course.

At the low end of the valley the subfascias of the two roofs are mitered with a block filling. Ensure that your porch is leveled. Sep 12 2020 explore peter baker s board roof tie in on pinterest. Tie into the end of an existing gable roof by removing existing facing boards wall siding and any other obstructions back to the first truss of the old roof.

Tie a new gable or hip roof to an existing gable or hip roof with valley rafters which perform the same function as ledgers. Butt the first new truss against the old one. Up from the valley center and cut through the shingles and underlayment. After the addition roof is framed and sheathed snap a line on the existing roof shingles 2 in.

There are a couple of big concerns. Tying in to an existing gable roof. The shed rafters attach to the header opposite the cripple. Com new foundation piers would then be installed and sized only with the roof in mind.

Aug 21 2018 tying a gable roof into an existing roof is a long expensive project usually undertaken only when there is a major addition or renovation to a house.