Roof Vents and DrainsA variety of roof vents and drains allow for vapor pressure control and drainage, providing watertight seals between the roof, the drain and plumbing. 
Flex-I-Drain®Flex-I-Drain is a unique roof drain system, designed to connect to the building plumbing system with no hub connectors. The flexible bellows allow differential movement up to 1"(2.54 cm) in any direction between the roof deck/roofing system and the plumbing. Flex-I-Drain can be installed in any new or existing roofing system. Because of its unique flashing system, it is compatible with all roofing membrane systems and decks. Up to 31/2"(8.89 cm) of insulation can be placed under the drain. 
FP-10 One-Way® Roof VentThe FP-10 One Way Roof Vent is a solar operated, moisture/ vapor venting unit designed to release and prevent the re-entry of moisture-laden air in new or existing lightweight fill decks and most low-slope industrial/commercial roofing systems. The venting unit consists of three major components: A one piece roof deck flange and body; a weatherproof cap; and a silicone rubber valve. The deck flange is 10" (25.4 cm) in diameter, while the body has a base diameter of 4.5" (11.43 cm) and a height of 6" (15.24 cm). As the sun heats the roofing membrane causing trapped moisture- laden air to expand, the one way valve is forced open, releasing the moisture into the surrounding atmosphere. When the roofing membrane cools, the process is reversed. Cooler air in the roof sandwich contracts tending to draw moisture laden air into the roof system. The one way valve closes preventing its re-entry. The one way silicone-rubber valve also prevents the entry of snow and wind blown rain. The FP-10 Roof Vent is manufactured in black polyethylene and is designed for use in bituminous systems. For heat-weld systems, do not apply heat directly to vent. 
Hercules® RetroDrain®The Hercules RetroDrain is manufactured from 0.125" (3.18 cm) 1100 aluminum alloy, in a one-piece design. It is supplied with six welded studs to secure the cast aluminum clamping ring. Clamping ring accommodates one of three domes – cast aluminum, SuperDome® or PC/PET. 
PC/PET RetroDrain®PC/PET RetroDrain replacement roof drains are manufactured from engineering resin copolymer. The PC/PET is tough. It is consistently resistant to temperature extremes. This resin performs effortlessly, permitting quick assembly of interlocking parts. The strainer dome installs with a snap fit. The ribbed clamping ring, with raised connection bosses, positions perfectly everytime, while forming a watertight seal to the roof membrane. Specially coated clamping ring screws have outstanding pullout strength without possibility of back-out. The one-piece molding of the RetroDrain body makes leakage impossible. In addition, the flat flange is designed to sit flush on the existing roof drain, thereby eliminating any need to remove the old drain. And, of course, the integral U-Flow® seal guarantees an absolute watertight connection to the old drain pipe. Performance of the seal is ensured by ultrasonically welded brass inserts and stainless steel screws. Installation aids available: 13" (33.02 cm) shaft screwdriver with loss prevention cord and 13" (33.02 cm) steel power bit and hole punch used to cut holes in roof membrane for accurate flashing. 
AlumaWeld® RetroDrain®The AlumaWeld RetroDrain is manufactured from spun aluminum. The drain has an extra large flange coated with plastisol for direct hot-air welding of JM PVC roof membranes. The drain flange has a depressed sump area to facilitate the easy drainage of all water from the roof surface. The strainer dome for the AlumaWeld RetroDrain is manufactured from cast aluminum and is securely attached with metal clips and a push-in fastener system. The Johns Manville Heavy Duty AlumaWeld RetroDrain incorporates the patented technology of the U-Flow® seal providing a mechanical watertight connection. 
SuperDome® RetroDrain®SuperDome RetroDrain is a heavy-duty retrofit roof drain system designed to withstand harsh abuse. Its cast aluminum strainer dome with screw-down lid secures the drainage system against vandals while permitting access to authorized personnel. The strainer dome with integral clamping ring is connected to the RetroDrain body. The connection to the existing drain pipe is made with the impenetrable U-Flow® seal. The SuperDome RetroDrain equals the PC/PET RetroDrain for strength and serviceability. The added features result in total security. Installation aids available: 13" (33.02 cm) shaft screwdriver with loss prevention cord, 13" (33.02 cm) steel power bit and hole punch used to cut holes in roof membrane for accurate flashing. 
USII RetroDrain®The USII RetroDrain product line is manufactured from 0.064" (1.6 mm) spun 1100 aluminum alloy. Its one-piece construction drain body is designed for retro-fit applications. The strainer domes securely fasten to the flange by means of a push-in fastener system. The model incorporates the technology of the U-Flow® seal providing a mechanical watertight connection. The versatile USII RetroDrain easily fits into schedule 40 or 80 pipes. Available with cast aluminum or PC/PET strainer dome. Installation aids available: 13" (33.02 cm) shaft screwdriver with loss prevention cord, and 13" (33.02 cm) steel power bit, for easy installation. Johns Manville Roofing Systems |