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T. Clear Corp.


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Board Insulation Board Insulation

Foam Board Foam Board

XPS (Extruded Polystyrene) XPS (Extruded Polystyrene)

Sloped Ceiling Sloped Ceiling

Design Options

Product Description

LightGUARD & HeavyGUARD Protected membrane roof insulation panels combine insulation and ballast to protect the waterproof membrane from wind and damage caused by hail, UV radiation, vandalism, thermal cycling and physical abuse.
The insulation panel utilizes the superior moisture resistance and high compressive strength properties of Dow Styrofoam. A layer of latex-modified concrete is bonded to the surface of each panel further protecting it from physical abuse as well as providing ballast. Each panel has tongue and groove edges for easy installation.
LightGUARD panels consist of 3/8" latex-modified concrete bonded to 2" or 3" Styrofoam and weigh 4.5 lbs/sq.ft.
HeavyGUARD panels consist of 15/16" latex-modified concrete bonded to 2" or 3" Styrofoam and weigh 11 lbs/sq.ft. It is perfect for rooftop gardens and light traffic decks.



Standard Sizes: 2' 0"


Standard Sizes: 4' 0"


Standard Sizes: 2", 3"

Performance Data

R-Value Per Inch

Measure of the thermal resistance of the product per inch of thickness, imperial units.

°F·ft^2·h / BTU / inch


Water Vapor Transmission

An imperial perm is defined as 1 grain of water vapor per hour, per square foot, per inch of mercury

Smoke Development

As defined by the ASTM E84 testing standard

NRC Value

The Noise Reduction Coefficient values of this product

Flame Spread

As defined by the ASTM E84 testing standard

Fire Resistance

Amount of time the product can withstand fire

Product Weight Per Area

Varies if the product comes in multiple thicknesses.

lbs / ft^2


T. Clear Corp.