Corrugated Polycarbonate FAQs for Greca Pattern Polycarbonate with Anti-Condensate inner surface. Sold in 1 ft. Increments. Installation often easier on purlin type frames.
• Why no 74″ wide sheets, for 6 ft. layout, listed on the web site? With 51″ sheets one can be on a step ladder and easily bend over the sheet to fasten to the frame. The other issue is wind. Long 74″ wide sheets could be difficult to deal with, should a good wind pick up.
• You say Multi-Wall Polycarbonate offers higher R-Value and tighter installations. Please explain. Corrugated has an R-Value of only .84. See Polycarb R-Value for R-Value of various thicknesses of multi-wall polycarb. Also, the multi-wall sheet (being than it is flat) offers a tighter seal when fastened to the frame. If you are heating a polycarb covered structure the corrugated it will cost you a lot more to heat and a larger heater may be required.
Design–See corrugated options below (click on photo for enlargement)
Also pool enclosures, patio covers, carports, canopies and Steel Truss Frames Covered with polycarbonate.