WP Details:F1.7.11 (Bi-Level Drain - Hard Surface: Low Pervious Wearing Course)
WP Details:F1.7.11 (Bi-Level Drain - Hard Surface: Low Pervious Wearing Course)
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1 WORK INCLUDED
(1) Membrane Primer or Adhesive: proprietary primer or adhesive, application method and quantities for substrate type as directed by membrane manufacturer's published application specifications.
(2) Primary Waterproofing Membrane: Fully adhered to acceptable substrates (concrete slab shown), installed as per RoofStar Guarantee Standards for Waterproofing Plazas, Promenades & Terraces and Membrane Manufacturer's installation specifications.
(3) Protection Board & Filter Fabric: Proprietary (purpose-made) drainage boards and filter fabric required with semi- impermeable sand and gravel beds designed to provide levelling for unit masonry.
2 WORK BY OTHERS
(A) Acceptable Deck: Concrete slab shown
(B) Drain Body: Proprietary Bi-level cast iron roof for waterproofing assembly with low previous wearing courses.
(C) Drain inlet: Drainage opening at top surface of semi- impermeable wearing courses on Bi-Level drain.
(D) Drainage Board /Filter Fabric: Proprietary drainage board approved by membrane manufacturer, compatible with waterproofing membrane system, and compliant with Section 14, Penetrations and Drains.
(E) Sand/Gravel Bed with Filter Mat: Synthetic water permeable fabric required to contain sand beds for unit masonry (bricks, pavers and stone).
(F) Unit Masonry Wearing Course: Concrete brick, pavers and stone on sand or gravel beds designed to support predicted live loads.
NOTE: Refer to RoofStar Guarantee Standards for additional requirements.
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