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By certification 
FRP roofing usually use a protecting facility in construction site, steel structured workshop and warehouse, canopy, packing sheds, corridors, studio light awning and greenhouse ect as the excellent light transmittance.
Fiberglass roof is the more strengthened, safty, and more econimal greenhouse panel with the properties of waterproof, good light transmittance, heat insulation, strong impact resistant, withstand extreme temperature.
Normal thickness: 1.2mm,1.5mm,2.0mm,2.2mm,2.5mm,3mm ect.
http://www.cndhfrp.com/
