Used in roof systems where the insulated membrane assembly method of waterproofing is provided. It is used where built-up felt and asphalt waterproofing is installed. A 4″(100) high perforated stainless steel gravel stop is supplied to retain the crushed gravel used in IRMA flat roof construction
Regularly Furnished – Duco Cast Iron Body with Flashing Clamp, 1/16″(2) Thick, 4″(100) High Stainless Steel Perforated Gravel Stop with 3/8″(10) Dia. Openings and Polyethylene Dome.
