GravelGuard is 4' x 4' in size and designed for Built Up Roofing Systems to help prevent the flow of hot bitumen or roofing gravel into the roof drain leader pipe. GravelGuard is constructed of rigid .060" thick aluminum for durability and is quickly assembled on the rooftop with four 7/16" stainless steel bolts. Securement to the roof system is non-penetrating since GravelGuard is set in bitumen and stripped in with roofing felts.

Features & Benefits

Features

• Constructed of .060" thick aluminum.
• Includes a 1" high, vertical face, notched in “V” fashion.
• Pre-fabricated.
• Retains the flow of Coal Tar Pitch during high temperatures.
• Assembly is quickly and easy.
• Available in standard 4' x 4' configuration.
• Can be custom fabricated.

Benefits

• Constructed of .060" thick aluminum for durability and strength when exposed to rooftop foot traffic.
• The 1" high, vertical face, notched in “V” fashion is designed for drainage at every 2” O.C. with a 4" wide flange for interply flashing.
• The pre-fabricated design insures product uniformity and quality control.
•  GravelGuard retains the flow of coal tar pitch during high temperatures and prevents gravel migration into the drain sump area.
• Assembly is quickly completed on the rooftop with the four stainless steel bolts provided using a 7/16" wrench.
• Available in standard 4' x 4' configuration which accommodates most drain sump details.
• Can be custom fabricated to meet specific project requirements.

Application

OlyFlow RetroDrains are designed to replace existing drains in reroofing applications. Installed from the roof surface, the OlyFlow RetroDrains are engineered to be installed without removing the existing plumbing or fixture while providing a watertight connection to the roof system and the existing plumbing.