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4. RE-ROOFING OVER SHAKE <br /> PROCEDURE No. 4 <br /> INSTALLING 1 X 4 (25 X 100MM) COUNTER BATTENS <br /> 1 x 4 COUNTERBATTEN <br /> (25 x 100mm) <br /> 12"MAXIMUM NAIL SPACING <br /> ✓✓ (300mm) <br /> .l <br /> r+ RAKE BUILDUP <br /> ` L <br /> t � <br /> 24' (soomm) <br /> RAFTER SPACING ON CENTER <br /> PURPOSE <br /> To create an even surface for securing the <br /> 2 x 2(50mm x 50mm)Gerard panel maximum of 24'on center,shall be laid <br /> battens. directly above and parallel to the framing <br /> members and attached at 12'on center FASCIA BUILDUP <br /> PROCEDURE with one 16d common nail.Fasteners <br /> shall have a minimum combined <br /> O Set counter-battens at 24' (600mm)on penetration into the sheathing and framing <br /> center. Rafter spacing greater than 24' members of 1'. <br /> (600mm)on center must receive additional <br /> counter-battens between each rafter for If the rafter/truss members are counter-battens,spaced a maximum of <br /> support. completely concealed by the existing roof 24'on center,shall be laid across the <br /> cover and a'boxed-in eave detail,then existing roof surface parallel to the <br /> ® Install counter-battens flush with the the counter-battens may be positioned at framing members and attached at 6'on <br /> fascia build-up and continuing along the the 24'maximum spacing,but center with one 16d common nail. <br /> full rafter length to the ridge. Nail each independent of the rafter/truss member. Fasteners shall have a minimum <br /> counter-batten according to the following In this circumstance,the following combined penetration into and through <br /> method: 'Alternative'fastening method shall be the existing roof covering and sheathing <br /> used: of 1/4'. <br /> A)Preferred Method <br /> (Counter-battens placed directly above B)Alternative Method ®When encountering protrusions through <br /> rafter/truss members)Where roofing is (Counter-battens placed independent of the roof, i.e.,: chimneys, air conditioners <br /> placed over spaced sheathing or an rafter/truss members) and vents,etc.,install a counter-batten on <br /> existing roof covering,nominal 1'x 4' Where roofing is placed over an existing both sides of the protrusion extending <br /> wood counter-battens,spaced a roof covering,nominal 1'x 4'wood approximately 6'(150 mm)out both ends. <br /> GERARDPage 32 0 Gerard Roofing Technologies,2001-03-01 <br />