Plywood Roof Sheathing Spacing

Apa recommends a 1 8 inch space between panel edge and end joints.

Plywood roof sheathing spacing.

Check the nailing surface is level step 2. Ventilate the roof according to current building codes step 3. Support spacing when the panel is used for subflooring. Plywood is made with three or more layers of thin wood glued together with the grain.

Properly fasten panels including fastening and spacing hints step 4. Check building code requirements for installation of panel edge clips. Many factors affect thickness. And scroll down to see more details on each with installation hints and tips below.

The number of nails needed for a roof varies on multiple factors such as board face width length and roof truss spacing. The minimum plywood for roofing plywood is layers of wood. For improved performance consider thicker roof sheathing panels panel edge clips or panels with tongue and groove edges. Spacing in inches for roof sheathing.

If the wood structural panels are tightly butted there is no room for expansion and buckling can occur. The solution 1 8 spacing plywood manufacturers are aware of these problems. A 1 8 inch space between adjacent panel end and edge joints is recommended unless panel manufacturer indicates otherwise. Plywood and oriented strand board osb like all wood products will expand or shrink slightly with changes in moisture content.

Plywood clips also referred to as h clips or panel edge clips are small metal brackets placed between the unsupported edges of plywood sheathing to effectively reduce the support spacing and stiffen the plywood. The second number is the maximum o c. Boards used for sheathing range from those with a 4 inch face to 48 inch long plywood sheets. A structure s roof truss spacing can vary from every 12 to 24 inches.

A half inch cdx plywood is often used with rafter with 24 inch spacing. In severe cases the sheets of plywood can actually create humps and dips between the roof framing members. Cover sheathing with. Panel selection handling and storage table 2.

The thickness of plywood used for roof decking depends on the roof slope the spacing of. A panel marked 32 16 may be used for roof sheathing over supports spaced up to 32 inches o c. If your roof carries a heavier load like if there s less pitch and or it snows in your area a roofer may recommend the use of the inch variety. That can mean costly time consuming callbacks.