About Master Flow™ Roof Louver RT65 Plastic Square‑Top

This plastic square-top utility vent is manufactured with UV-resistant polymer and includes pre-drilled nail holes for easy installation.  Available in four popular colors, it provides 60 sq. in. (41,395 mm2) of NFA to help exhaust heat and moisture from the attic.


Note: Always have a balanced ventilation system. In no case should the amount of exhaust ventilation exceed the amount of intake ventilation.

Features & Benefits

Eligible accessory product in the Attic Ventilation Category of GAF Residential Enhanced and WindProven™ Limited Warranties*

*15-year WindProven™ Limited Wind Warranty covers GAF Shingles with LayerLock® Technology only and requires the use of GAF Starter Strips, Roof Deck Protection, Ridge Cap Shingles, and Leak Barrier or Attic Ventilation. See GAF Roofing System Limited Warranty for complete coverage and restrictions. Visit gaf.com/LRS for qualifying GAF products. For installations not eligible for the WindProven Limited Wind Warranty, see GAF Shingleand Accessory Limited Warranty, Master Flow™Ventilation Products Limited Warranty,or Master Flow™ Powered Ventilation Products Limited Warranty (depending on product) for complete coverage and restrictions.

Product Documentation

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Parts of a GAF roofing system

Residential warranties

Ridge cap shingles

The finishing touch that helps defend against leaks at the hips and ridges.
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Attic ventilation

Helps to reduce attic moisture and heat.
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Rooftop accessories

Specialty roofing accessories designed to enhance the performance of your roofing system.
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Shingles

Beautify and protect your roof for years to come.
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Starter strip shingles

Helps to guard against shingle blow-offs.
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Roof deck protection

Helps shield the roof deck from moisture infiltration.
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Leak barrier

Helps prevent leaks caused by wind-driven rain and ice dams.
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