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GEOSCIENCE LTD


LABORATORY TESTING DIVISION


6260-B Marindustry Drive San Diego, CA 92121

PROPERTY CERTIFICATION

CLIENT: Waco Composites
481 D Texas Central Parkway
Waco TX 76712
DATE: December 8, 2000

MATERIAL INVESTIGATED:
Glass composite (thickness = ½")
P.O. # Verbal

PROPERTY MEASURED:
R Value and Thermal Conductivity

MEASUREMENT METHOD:
Guarded Hot Plate (following the procedures of ASTM C-177)

RESULTS:

Mean Temperature
°F
R Value
hr ft2 °F/Btu
Thermal Conductivity
Btu/hr ft °F
95 0.176 0.237


*Details of the investigation are not included in this Property Certification; the results presented here apply only to the samples tested.

H. F. Poppendiek
CERTIFYING OFFICER