China Artisan FRP Sun Wall Sheet Sales Team Service:
Holes for fixing should drilled and not punched and should be 2mm larger in diameter than the fixing accessories.
Roofing bolts and nuts.Self-tapping screw with sealing rings and washers.
Washers minimum 32mm should be incorporated with the above fixings,complete with suitable sealing rings or washers.
Where sheets with corrugations over 25mm depth are fixed through the crowns to intermediate purlins.Shaped packing pieces should be located between the crown of the sheet and the support.
This should allow the fixing to tightened sufficiently without distance the profile of the sheet.
Fixing should not be located less than 50mm from the ends of sheets.
All side laps should be stitch (seam)bolted at maximum 300mm(12in)centers for roof pitches below 10 and maximum 375mm(15in) centers for roof pitches 10 and over.
In vertical cladding applications all side laps should be stitch(seam) bolted at maximum 450mm(18in) cenetrs.
Minimum end laps,if unsealed,should be as follow:-
Below 15o roof pitch–not recommended .
Over 15o roof pitch–300(12in) lap.
Over 22,1/2o roof pitch-150mm(6 in) lap.
Where sealed end laps are used a minimum 150mm(6 in) lap is sufficient.
It is recommended that sheets should not overhang supports at eaves by more than 230mm.
Side laps between FRP sheets should always be sealed,using closed cell P.V C. self adhesive type or mastic sealing strip.
Side laps and end laps between FRP and other roofing materials on roof pitches 15o or less should always be sealed using closed cell P. V.C. self –adhesive tape or mastic sealing strip.
On steeper roof pitches ,where FRP Sheet is used in Conjunct ion with other roofing materials, side mend laps Should be sealed to the same specification as for the other materials.