Installation Guide

Performance of Multiwall Polycarbonate
UV-Protection
The light and radiant energy rom the sun has a harmul e󰀨ect on
polycarbonate. Multiwall polycarbonate features a UV-protected surface
on one or both sides of the sheet. This UV pr
otection prevents ultraviolet
rays from deteriorating the polycarbonate, ensuring the sheet will not crack,
yellow, or weaken from intense sun exposure. When installing multiwall
polycarbonate, it is important to have the UV-protected surface facing
up or towards the sun.
Hail Resistance
Multiwall polycarbonate is virtually unbreakable and has outstanding impact strength and performance.
In rigorous testing simulating hailstorms with stones of various diameters, multiwall polycarbonate
sheets showed no signs of breakage or penetration. Please see product-specic warranty for storm
damage coverage.
Physical Properties
Vicat Softening Temperature, B120 ISO 306: 293°. This temperature
reects the point at which polycarbonate will soften in an elevated
temperature application.
Continuous-Use Temperature Rating: Maximum of 212°F; Minimum
of -40°F. However, it is possible to use multiwall polycarbonate at lower
temperatures – the embrittlement temperature (point where the material
becomes brittle) is -148°F.
Coe󰀩cient of Linear Thermal Expansion, 23-80°C ISO 11359-2: 1°F
4.00 E-05. Because polycarbonate expands and contracts with temperature
change, sheets should be installed between 55°F and 70°F. Allowance must
be made for both the length and width of a sheet at a rate of .04” per 1’ per
100° temperature di󰀨erentials. Bronze multiwall sheets expand and contract
more, requiring an additional 30% space.
Note: Sheets installed in extreme cold or hot weather conditions (even if the holes are pre-drilled) may crack
or warp when the temperature uctuates between the seasons.
Note: The masking lm on the polycarbonate sheet indicates which side of the sheet is UV protected.
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MULTIWALL POLYCARBONATE
Technical & Install Guide