... 4. Corrosion resistance 5. Sound and heat insulation Product: Semi-transparent corrugated FRP roof tile Width: 720mm, 1100mmThickness: ... Product Features: 1. Environmental protection and energy conservationJELI synthetic resin roof tile is a kind of environmental-friendly, ... support distance being 750mm4. Sound and heat insulationJELI synthetic resin roof tile has good sound and heat insulation ...