- Q.We’re framing a
gable-roofed house with roof trusses. The roof includes
a bumpout with a smaller gable roof that intersects the
main roof, forming two valleys. A valley set will be
installed on top of the main roof sheathing. The
sheathing along the valley doesn’t have
blocking for continuous nailing, and I’d
rather not nail sheathing to sheathing. Should I
install blocking between the framing members of the
valley set to provide better nailing?
A.Don Richardson,
president of the U.S. Division of Romaro
Structures, a truss manufacturer, responds:
Installing blocking is not necessary, since the
sheathing in a valley doesn’t need to be
nailed between framing members. The same situation
occurs at a ridge; although a truss roof, unlike a
conventionally framed roof, has no ridge board, no
blocking is necessary at the ridge. Contractors who
feel more comfortable with blocking can always
install it, but it is unnecessary.