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Dörken Systems Inc. (1)
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DELTA-TRELA Roofing Membrane by Cosella Dorken. The structured separating layer for ventilated and non-ventilated pitched roofs with metal covering for ultimate protection. DELTA®-TRELA is a high end membrane, completely waterproof, highly water vapor pe DELTA®-TRELA 3'-3" X 98.6'----- 323 Square Feet


  • Pitched Roof
  • Metal Covered Roofs
  • Extremely Resistant

Our Price: $660.90