Roof Sheathing Spacing

For improved performance consider thicker roof sheathing panels panel edge clips or panels with tongue and groove edges.

Roof sheathing spacing.

To assure best performance follow these panel spacing and nailing recommendations for apa rated sheathing apa rated sturd i floor and apa rated siding. Roof sheathing basics the skeleton of a roof is formed with rafters or trusses generally spaced 16 inches or 24 inches apart from the center of one rafter to the center of the next. Plywood is made with three or more layers of thin wood glued together with the grain. A strong resilient roof is a home s first line of defense when the roof deck is exposed to weather.

Zip system roof assembly combines our revolutionary integrated sheathing and flashing tape or liquid flashing to provide a sealed roof for protection against moisture intrusion during construction or if high winds strip the roof covering away. Cover sheathing with. Typically 1 4 or 1 6 boards of wood are installed with a 3 5 maximum space between each board directly over the roof rafters or in a cold roof system over the plywood deck. To stabilize the rafters support the roofing material and hold the entire roof together roof sheathing is installed.

Tighter nail spacing is recommended 4 inches on center maximum. Before hurricane andrew devastated south florida in 1992 roof sheathing was generally attached using 6d nails spaced at 6 inches along the edges of the sheathing and at 12 inches along interior. The thickness of plywood used for roof decking depends on the roof slope the spacing of. Spaced sheathing also called skipped decking refers to the construction details of the substrate which the cedar gets nailed to and thus secured to your home.

Method for maintaining a continuous load path at the roof ridge by nailing roof sheathing. Avoid standing between framing which can induce panel deflection. Use a 10d box nail to gauge 1 8 inch spacing between panels. Structural sheathing is typically cut slightly short of 48 inches by 96 inches to allow for this expansion gap look for a label that says sized for spacing this gap prevents buckling of panels due to moisture and thermal effects a common problem.

A 1 8 inch space between adjacent panel end and edge joints is recommended unless panel manufacturer indicates otherwise. Holes drilled in roof sheathing for ventilation roof diaphragm action is maintained. For clarity sheathing nails are not shown. Ventilate the roof according to current building codes step 3.

The minimum plywood for roofing plywood is layers of wood. Many factors affect thickness. Check the nailing surface is level step 2.