The lower edge of a roof should extend beyond the fascia board by about 3 4 inch so that runoff drains into the gutters.
Roof sheathing fascia installation.
When sheathing a roof the first step is to snap a line so that the first row goes on straight.
If this slight overhang is too short water will drip behind the gutters leading to rotted roof sheathing and fascia stained siding and even soil erosion and a flooded basement.
Draw a full scale mockup and snap a line with fascia in kind.
But if you snap it at 40 inches then the sheathing will not project over the subfascia or true fascia.
Then the thinner fascia is attached to the sub fascia.
Then the roof sheathing gets attached and extends over the sub fascia.
When installing roof sheathing use nails with longer nail shank larger diameter and a larger head than may be required.
Starting with how to place the first row of sheathing we cover fastening methods the use of h clips stagg.
Check the nailing surface is level step 2.
The drip edge will be installed 1 8 proud of away or out from the furring strip in best practice or may be installed tight against the furring strip reduces the life of the furring strip by rot.
Ventilate the roof according to current building codes step 3.
The pitch of the roof also affects the height of the sub fascia.
And scroll down to see more details on each with installation hints and tips below.
Roof sheathing is a lot more than just flat panels onto which shingles are attached.
We go in depth on how to install roof sheathing.
Properly fasten panels including fastening and spacing hints step 4.
Cover sheathing with.
How to install roof sheathing.
The roof s sheathing helps to keep the roof trusses or rafters properly spaced.