Roof Plywood Nailing Pattern

How to install plywood roof sheathing.

Roof plywood nailing pattern.

If you install plywood sheets tightly against one another the edges tend to pucker upwards when they expand. It is important to apply roofing nails in the right quantity and location to securely lock a shingle into its place. Accurate nailing affects the performance of roofing shingles and it is also required by the international building. Irc table r602 3 1 footnote f.

Properly nailing plywood down is more complicated than just whacking away at a nail with a hammer. Check the nailing surface is level. Bitumen roof shingles may be one of the simplest roofing materials to install but nevertheless they also require specialized and exact rules on how to be fastened. Use a staggered pattern when building up rows of plywood sheets.

Make sure to leave a 2 3 mm gap between boards. Subfloors use a 3 16 inch head. Always check for a level nailing surface. This is to allow for any expansion or contraction in the material particularly relevant in the australian climate.

Portions of roof areas that overhang beyond buildings exterior walls eaves should use zones 2 and 3 fastening. Cover sheathing with shingle underlayment felt. There are hundreds of different nailing patterns for tons of building materials ranging from drywall to trusses and everything in between. The ring shanks on the shaft act like little barbs to grip the wood tightly when driven so that they resist loosening up over their lifetime.

Because plywood is often used in support situations where it is part of the underlayment for. In severe cases the sheets of plywood can actually create humps and dips between the roof framing members. This happens because there is no other direction for them to go to relieve the swelling pressure. The fastening schedule prescribes nailing at 6 inches on center at supported panel edges and over intermediate panel sup ports in zone 1 4 inches on center in zone 2 and 3 inches on center in zone 3.

Ventilate the roof according to current building codes. They are best used when nailing solid wood boards and not plywood. When wind speed is 110 mph or greater and when median roof height is between 25 and 35 feet use 8d ring shank nails 0 135 x 2 1 2 inches within 48 inches of gable end walls. Install shingles according to manufacturer recommendations step 1.

The solution 1 8 spacing. Also for gable shaped roofs where.