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.
Nailing 3 4 apa roof sheathing.
This video may depict some work practices that do not meet current safety standards.
Cover sheathing with shingle underlayment felt to minimize roof sheathing exposure to weather unless otherwise recommended by sheathing manufacturer.
Roof fastening zone wind main sheathing to gable overhang velocity roof end wall framingg eaves 3 second panel 123 2 3 2 3 gust locationi fastening schedule inches on center supported panel 666 6 6 150 mphf g end and edges 3h panel field 6 4 3 4 3 supported panel 666 6 6 120 mphf g end and edges 3 panel field 12 6 4 6 4 supported panel.
Cover roof sheathing as soon as possible with roofing felt or shingle underlayment for protection against excessive moisture.
Apa data file form no t325d can be downloaded from apa s web site.
Use a 10d box nail to gauge 1 8 inch spacing between panels.
Lumber width slats of wood used for roof sheathing are lumber boards with face widths ranging from 4 to 12 inches.
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.
Avoid roof complaints with proper framing sheathing and roofing techniques.
To assure best performance follow these panel spacing and nailing recommendations for apa rated sheathing apa rated sturd i floor and apa rated siding.
Always ensure your work site is compliant with current osha regulations.
Produced by apa the engineered wood association formerly the american plywood association in 1989.
Typical size is 4 ft x 8 ft but other sizes may also be produced.
Generally you ll need to place two nails at each location where it makes contact with a roof truss.
Fasten panels 3 8 from panel edges.
For panels over 1 use 8d ring shank or 10d common nails.
For slats featuring face widths of 12 inches you will space three nails evenly apart about every 3 inches.
Commonly square edge but may be produced with tongue and groove edges.
2 4 common performance categories and corresponding span ratings performance category span rating 3 8 24 0.
Other code approved fasteners may be used.
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.
Spacer type panel edge clips may also be used for roof sheathing applications.
