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TAS 100-95, Test Procedure for Wind and Wind Driven Rain Resistance of Discontinuous Roof Systems is the procedure which consists of testing shingles with underlayment and ventilation devices used in the roofing system. The test measures the ability of the roofing system to resist infiltration of rain at a wind speed of 110 mph for ridge vents and other ventilation components. The wind speed is ramped between 0 for 10 minutes and 35, 70, 90, for 15 minute intervals and at 110 mph for 5 minutes. The water spray is on during the wind cycle. Increased wind speed testing is ramped from 110 mph at one minute intervals to 115, 120, 125, 130, 135 and 140 mph. Failure results when water infiltrates the sheathing or a shingle tab tears or blows upward and does not re-seat at the end of the test. |
TAS 108-95, Test Procedure for Wind Tunnel Testing of Air Permeable, Rigid Discontinuous Roof Systems is the procedure which tests wind resistance of tile roof assembly and determines the aerodynamic properties of the tile. The test is started at 70 mph and ramped in 10 mph increments until a final wind speed of 110 mph is reached. Pressure measurements are taken to determine the coefficients of pressure, moment, and lift and the aerodynamic multiplier of the tile. Visual damage to the system below 90 mph results in a re-test. The TAS 108
test has been adapted to determine uplift coefficients for asphalt shingles. PRI has
significantly upgraded its wind tunnel test capability. The tunnel has been fitted with a new
engine and has been completely enclosed for better control of the flow of
air.
New engine and enclosure for wind tunnel testing at
PRI. |
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Call PRI for scheduling and pricing for wind
machine testing at 813-621-5777.
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