Store pallets under a solid roof out of direct sunlight with the white cover securely wrapped over the pallet. This prevents solar heating, which may reduce material strength, and slows moisture absorption, which may warp the acrylic.
Cut with a handheld circular saw and an acrylic cutting blade.
Reputable acrylic blade suppliers include Forrest, Freud, and Amana.
Support the sheet under both sides of the cut.
Clamp a straight guide board on top of the sheet; prevent the sheet from vibrating.
Drill fastening holes with a ¼” to ¾” step drill.
Insure the drilled hole is smooth and free of burrs.
Rip sheets 1 ¼” from the nearest wave crest. This insures overlapped sheets nest properly and shed water.
DO NOT WALK ON THE ACRYLIC. Lay 2’x10’ walking planks across the sheets.
A non-slip foam or rubber sheet under the plank will help protect the acrylic from scratches.
Use only approved paints, cleaners, sealants and gaskets. Non-approved products may attack the acrylic.
Recommended sealants include DOWSIL™ 795 and GE SilPruf™ SCS2000.
Pitch the roof 1” for every 12” of run to insure water sheds off the roof.
Support sheets on continuous purlins across the width of the roof.
The vertical spacing of purlins depends on the wind and/or snow loads:
Spacing, inLoad, psf
Paint the top of the roof structure (rafters and purlins) with a reflective white paint; prevent overheating.
Design for expansion due to temperature and humidity.
As the weather changes from dry cold to humid hot, the sheet expands 1/8” for every 1’ of length.
For example, a sheet 12’ 0” long in winter may grow to 12’ 1 ½ “ in summer.
Allow sheets to expand by limiting clamping forces and including sufficient flashing to cover the expected movement.
Install a row of fasteners at every purlin. Fasten at the crest of the wave profile, 9” or 12” on center.
Recommended fasteners include #14-10 roofing screws for wood and sheet metal purlins, and ¼-20 threaded J-bolts for galvanized tube structures. Always include a gasketed washer under the fastener.
ACRYLITE® sells a special gasketed aluminum saddle washer that spreads clamping force over the crest of the wave profile and seals the fastening hole. These come in an aluminum mill or brown finish.
Allow for expansion by drilling oversized fastening holes: for ¼” fasteners drill holes ½” to 5/8”.
When sheets overlap, drill the bottom hole 1/8” larger than the top hole to allow the sheets to expand against each other.
Tighten fasteners ¼” turn beyond contact with the acrylic.
DO NOT OVERTIGHTEN FASTENERS. APPLY LIGHT CLAMPING PRESSURE ONLY.
Overlap side-by-side sheets by at least one crest (single lap).
Plan the layout if multiple sheet are required up the roof slope:
Each sheet up the roof slope must overlap the sheet below by 3”.
The overlapping joint must be above a purlin, with a row of fasteners through the two sheets.
Offset rows by a half sheet to avoid four corners meeting.