How To Sheath A Roof Valley

I ve got this 7 12 roof to work with and going into the valley i measured the long and short points.

How to sheath a roof valley.

It worked ok but it wasn t perfect. The following 2 formulas will give the inches to subtract off the lower square edge so plywood will match the valley rafter angle. Begin applying the sheets from the bottom of the roof the eaves and work your way up to the ridge. As you install roof shingles on the second roof plane you allow them to lap over the valley on top of the first shingles.

A chalk line can be used to guide you as you cut the shingles. It is important here that the sheathing at the eave line be exactly perpendicular to the rafters so that the sheets will meet at the centers of the rafters. Ll factor 12. The roof includes a bumpout with a smaller gable roof that intersects the main roof forming two valleys.

We go in depth on how to install roof sheathing. Starting with how to place the first row of sheathing we cover fastening methods the use of h clips stagg. Plywood sheathing angle cut to slope a difficult cut to determine is the angle of plywood sheathing where it intersects into a valley. The last course at the top may need to be rip cut if the roof is not in 4 foot increments.

I know there is a better way and i ll be ordering a certain book everyone likes but tomorrow i need to sheath a gable valley set that runs perpendicular to the main roof down from other side of the valley to meet the sheathing i cut to valley last week. A valley set will be installed on top of the main roof sheathing.