Polycarbonate Selection: --------------Step #2 > Choose Install System for Multiwall
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-> 1st See Sheet Cross Sections <.--.Poly Specs & Tolerances <.--.Samples & Guide
-Widths: 4 ft. easy roof install, crate lighter. -Lengths: Sold in ft increments 4 - 48 ft.-
6 ft wide poly is difficult to install, expensive ship.-Poly Delivery Policy--6mm Note
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Multiwall: - Range Greca Corrugated R-value is .9 and air can leak around corrugations..
Pricing & Discounts - -Light Transmission, R-value, Weight, etc - -Technical Info .-
6mm 2-wall replaces 1/4" glass, low cost, only poly u-profile. 48" & 72" wide - 1.6 R-value.
8mm* 2-Wall-mainly a horticultural sheet. 48" & 72" wide - 1.7 R-value.
8mm ThermoClear Plus 2-wall*-Clear long life sheet. 48" & 72" wide - 1.7 R.
8mm ThermoClear Plus "Softlite" 2-wall long life. 48" & 72" wide - 1.7 R-value..
8mm ThermoClear Plus 3-wall*-Clear long life sheet. 48" & 72" wide - 2.0 R-value..
10mm 2-Wall - mainly commercial, slightly stronger than 8mm. 48" & 72" wide - 1.8 R-value..
16mm 3-Wall for cold climates & architectural applications. 48" & 72" wide - 2.4 R-value..
16mm ThermoClear Plus 3-wall*-Special long life sheet. 48" wide - 2.4 R-value..
25mm ThClear Plus 6-Wall High insulation, long life! 48" wide - 3.7 R..
25mm 3-wall Clear - High light for solar & greenhouse. 48" wide - 3.0 R-value..
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• Thickness effects frame. Thicker = stiffer, for wider rafter placement or less blocking.
See Step #2 Choose Install System and charts, Load & Spacing, to determine thickness.
Also - Thicker poly = higher insulation. Pay now for more insulation or later for heat.
Clear for hort & solar, most light & heat. White (opal) & Bronze less light & heat. Poly Colors,?'s
Note: Bronze gets hot in sun, expands & contracts wildly and will creak during temp. swings.
* Indicates drip guard on interior surface of these sheets only, clear only. -
5° (1/12) Minimum Roof Pitch for exterior rain & inner channel condensation drainage.
More slope (pitch) if pollen producing trees overhead. 3/12 to 4/12 (14-18%) slope best
On exterior applications sheet Must be install with ribs running vertical, with roof slope.

How Clear is Poly?

Colors & Questions

Glass or Poly?

Poly is Easy to Cut

  
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