Nailing 3 4 Apa Roof Sheathing

Cover roof sheathing as soon as possible with roofing felt or shingle underlayment for protection against excessive moisture.

Nailing 3 4 apa roof sheathing.

This video may depict some work practices that do not meet current safety standards. 2 3 materials apa rated sheathing panels are produced as plywood or oriented strand board osb. At intermediate supports fasten panels 12 inches on center. Fasten roof sheathing panels properly fasten panels with a minimum of 8d common 0 131 inch by 2 1 2 inch nails spaced a maximum of 6 inches on center at supported panel ends and edges.

To assure best performance follow these panel spacing and nailing recommendations for apa rated sheathing apa rated sturd i floor and apa rated siding. Cover sheathing with shingle underlayment felt to minimize roof sheathing exposure to weather unless otherwise recommended by sheathing manufacturer. Region fastening in a 3 inch on center spacing using 10d ring shank nails is prescribed. For slats featuring face widths of 12 inches you will space three nails evenly apart about every 3 inches.

Apa data file form no t325d can be downloaded from apa s web site. Use shingle underlayment felt conforming to astm d226 type i astm d4869 type i or astm d6757 self adhering polymer modified bitumen sheet underlayment should conform to astm d1970 or check roofing manufacturer s. Lumber width slats of wood used for roof sheathing are lumber boards with face widths ranging from 4 to 12 inches. Fasten panels 3 8 from panel edges.

Other code approved fasteners may be used. 2 4 common performance categories and corresponding span ratings performance category span rating 3 8 24 0. Typical size is 4 ft x 8 ft but other sizes may also be produced. For panels over 1 use 8d ring shank or 10d common nails.

Closing thoughts apa data file form no t325d provides updated fastener schedules for plywood and osb structural panel sheathing used for roof decks of steep slope roof assemblies. Use a 10d box nail to gauge 1 8 inch spacing between panels. Avoid roof complaints with proper framing sheathing and roofing techniques. Commonly square edge but may be produced with tongue and groove edges.

Always ensure your work site is compliant with current osha regulations. Generally you ll need to place two nails at each location where it makes contact with a roof truss. Produced by apa the engineered wood association formerly the american plywood association in 1989.