How To Build A Gable Roof Addition

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.

How to build a gable roof addition.

Rather than a single slope a gable roof consists of two slopes that meet at a peak running down the middle of the roof. Use 8 penny nails to attach the first 2 in 4 in 5 1 cm 10 2 cm board to the wall studs. When you nail in the second boards offset the seams of the upper and lower layers by at least 24 in 61 cm. Nail the first boards on top of your wall where you plan to build your roof.

Then load bearing roof beams fixed to the trusses are extended in the same way. Mark these locations on the deck and cutout areas in the deck at these spots to be able to dig a hole in the ground below the deck set a concrete footing and attach the posts. After that you should fix the cornice board to the end sides of the ridge and the load bearing beams. Then mount new trusses on the new addition walls.

Nail 2 boards onto your walls as top plates. Determine the locations for your roof support posts. Adding one or more dormer windows to a gable roof is an age old way of adding living space to cramped quarters. Butt the first new truss against the old one.

For the arrangement of the gable end overhang for the standard roof you lengthen the ridge beam beyond the facade for previously verified length using cut rafters.