Inspect the underlying roof sheathing for damage and make any needed repairs.
How to put up roof sheathing.
Measure from the peak of the roof along each rafter on one side of the roof to determine the exact length of each.
Provide a 1 8 inch gap between the panels in each row.
Position the first piece of plywood.
The foam panels need to be secured to the roof around every 12 inches for safety.
You may choose between sheets that measure half an inch or 3 4 of an inch thick.
A minimum net free ventilation area of 960 square inches.
Hammer down any large nails that are exposed by the removal.
Whether you re building a subdivision or a home reno.
Install a layer of roofing insulation as recommended by the roofing manufacturer.
A helpful hint for installation is to use a straight edge along the cut line to ensure the panels fit best.
Start from the top of the roof and remove the old shingles along with the flashing underlayment and vents.
Cut each rafter tail on the chalk line with a circular saw to ensure that every rafter is the same length.
5 steps to proper roof sheathing installation step 1.
Use a straight edge knife or utility knife to cut the panels to size.
This is usually a prerequisite in building codes.
Lay sheets in rows with the long edge horizontal to the roof bottom.
When installing roof sheathing use nails with longer nail shank larger diameter and a larger head than may be required.
Once the roof rafters are perfectly aligned it is now time to prepare for the plywood sheeting.
Provide roof ventilation according to building codes.
This can be done with a straight piece of lumber 6 feet to 10 feet.
Osb sheathing has different textures on both sides as well.
Nail the panels to the rafters with 8d common nails spaced 6 inches apart.
Also use more nails and place them closer together to build a stronger roof.
Repeat along all of the edges across the entire roof.
Run a string line over the roof trusses and then either plane the high parts or add packing to create that perfectly straight line.
When you intend to install osb sheaths try to determine the breadth or the ideal measurement of your choice of material.
How to install roof sheathing 1.