WK97866 Standard Test Method for Determining Resistance of Asphalt Roof Shingles to Hail by Impact with Propelled Laboratory Produced Simulated Hailstones
WK97114 Determining Walkability of Steep-slope Underlayments
WK95132 Wind Resistance of Steep Slope Hip & Ridge Asphalt Roofing Shingles
WK84423 Standard Test Method for Determining Resistance of Asphalt Roof Shingles to Hail by Impact with Propelled Laboratory Produced Simulated Hailstones