Framing A Shed Roof With A Valley

Sheathing blocking is added along the valley and the sheathing pieced in for both roof planes.

Framing a shed roof with a valley.

A 2 4 wall with a 2 6 rafter can be notched for a 4 seat. That is except for the crowning glory the shed roof. For our 4 x8 lean to example using a 2 4 rafter the depth of the birdsmouth is limited by the 1 3 depth of the rafter rule. Position the square at the end of the rafter board with the tongue on your left and facing away from you.

To transition the eaves the horizontal fascia extends to the last rafter tail and a vertical return finishes the transition. At the low end of the valley the subfascias of the two roofs are mitered with a block filling in the roof framing. Add the length of the overhang beyond this mark and. Measure form the top of this line down the board to determine the line length or length of the rafter less the ridge.

In truth framing in the foundation and the walls adding doors and windows these are all relatively straightforward simple tasks. Use a framing square to help lay out the notch based on the slope of the roof.