Marathon EX-Flow Vent Black HDPE

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One Way - BV-1070

Manufacturer Part Number: BV-1070

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Price: $22.49

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Estimated Ship Date: Fri Apr 26 - Tue Apr 30

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Marathon Ex-Flow Vent Black HDPE is a high-density polyethylene vent recommended for BUR and modified bitumen applications. It is available in a one-way or two-way application. One way option is a special one-way nitrile rubber valve that prevents moisture from re-entering roofing systems. A two-way option is lacking a valve that will allow for both exhaust and convective movement of air between breathers.

High-density polyethylene (Black) for BUR and modified bitumen applications

U.V. stabilized PVC (White) for PVC membrane and polyurethane foam applications

Locking, the vandal-proof cap prevents entry of wind-blown rain or snow

Inexpensive, simple, and easy to install

One Way: Special one-way nitrile rubber valve prevents moisture from re-entering the roofing system

Two Way: Same features as one way without valve which will allow for both exhaust and convective movement of air between breathers

Breather and Vent General Installation Instructions for BUR

Select a location over an insulation joint

Center the vent over the opening making sure that the opening is free of debris and set in asphalt cement

Flash base flange with 2 plys of felt and asphalt cement

Extend the first ply 6" beyond the flange and the second 9"

Pour flood coat of asphalt to the base of the roof vent