Up from the valley center.
Perpendicular gable roof addition.
Gable roof with shed addition.
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When two perpendicular.
There are many roof styles but the most common are gable which slopes.
Here we will focus on adding length to the end of a house roof.
First you ll need to determine where your new gable roof will tie into the existing roof.
Re lay the shingles you removed from the existing roof.
A cross gable roof is a design that consists of two or more gable roof ridges that intersect at an angle most commonly perpendicular to one another.
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Shingle the addition roof letting the new shingles fold through the valley center and onto the old roof deck by at least 1 ft.
Take careful measurements to determine how many trusses you will need.
Building an addition on a house requires connecting two roofs whether the new space is a wing of living areas or a carport.
Bed the end of each shingle in a 2 in wide ribbon of roofing cement placed 4 in.
Tying a roof perpendicular to the existing roof will be another matter.
Some gable roof designs have a shed roof addition on the side.
Either the addition is added to form a t shape to the house with the ridge running perpendicular to the main house roof or the addition is continued on the end of the house making it longer with the ridge running the same way as the existing house.