Roof sheathing thickness maximum overhang length attachment 7 16 1 2 in.
Roof sheathing installation overhang.
Draw a full scale mockup and snap a line with fascia in kind to figure out for the sheathing snap line swing the square over to the pitch of the roof in this case it is a.
8d ring shank nails at 4 in.
Install edging use 1 1 4 inch nails to cover the outline of the roof with strips of metal eave flashing also called edging.
10d ring shank nails at 4 in.
When installing roof sheathing use nails with longer nail shank larger diameter and a larger head than may be required.
Position the first piece of plywood.
A tapered piece of sheathing can be cut to fill in at the eave if necessary.
Ventilate the roof according to current building codes step 3.
A typical metal roof overhang may be 2 to 4 inches or even less.
This indicates the truss tails.
Cover sheathing with.
Also use more nails and place them closer together to build a stronger roof.
How to install roof sheathing 1.
The everyday sheathing used on the body of a roof is not rated for weather exposure so when exposed eaves and or rakes occur at the perimeter a different more expensive weather rated grade of plywood or osb must be used.
When one slope is completely sheathed pop a chalk line down any slope edge as in a hip roof that needs to be cut at an angle.
Some slight overhang is recommended in conjunction with a drip edge flashing to prevent water from getting under the roofing and onto underlying wood.
Then we re going to use a scrap of 2x4 to space off the square and strike a line there.
Osb or plywood 18 in.
If there are gutters installed on the eaves the eave flashing should be installed to overhang the lip of the gutter by about 1 2 inch.
Check the nailing surface is level step 2.
Sheath one slope of the roof at a time ripping the top course to the needed width at the ridge.
Properly fasten panels including fastening and spacing hints step 4.
2 10d common nails per plank 1x8 to 1x10 planks 24 in.
3 10d common nails per plank.
1x6 or narrower planks 24 in.
Cut each rafter tail on the chalk line with a circular saw to ensure that every rafter is the same length.
Measure from the peak of the roof along each rafter on one side of the roof to determine the exact length of each.
Place corner pieces where panels will meet bends at the edge of the roofing.
At exposed roof overhangs the sheathing must be rated for exposure to the weather.
