Knauf Ultraflow Rafter Vent™

Serving as a ventilation channel, the Knauf Ultraflow Rafter Vent allows for a constant flow of fresh air from the soffit into the home’s attic, helping to reduce condensation in the winter and keeping the attic cooler in the summer. It delivers 10% more airflow and 25% stronger crush strength than the competition.

Applications

Attics

Full color illustration of what a rafter vent looks like installed, with airflow indicators.

OPTIMIZE YOUR ATTIC

The Ultra Flow Rafter Vent is the ultimate solution for maintaining proper attic ventilation. Designed to keep insulation in place while ensuring unobstructed airflow, it prevents moisture buildup and promotes energy efficiency. By directing air from soffit vents to ridge vents, this durable insulation baffle helps regulate attic temperatures and protect your roofing system.

Upgrade your attic with the Ultra Flow Rafter Vent for better ventilation and long-term energy savings.

Product Features

Exceptional Performance

Premium high-density polystyrene construction and proprietary design ensures a more durable vent, reduces crushing and directs improved air flow in your attic.

Ease of Install

Ultraflow Rafter Vents can be overlapped end-to-end for a continuous channel of air flow. "K" staple points along the outside flange act as visual guides for proper installation. Perforated for clean and easy separation on the job to fit cavities smaller than 24”.

Improved Energy Efficiency

Proper ventilation can reduce heat buildup and condensation. This can help increase the longevity of your roof and HVAC systems.

Product Details

Technical Data

Technical Data
Property (Unit)	Test
Length	48 inches
Width	22-1/2 inches
Height	2-3/16 inches
Thickness	0.100 inch
Weight	3.2 ounces
Color	Gray
Material	XPS (Extruded Polystyrene)
Crush Resistance	7 pounds
Tools Needed	Stapler or staple gun, applicable roof staples (3/8" max) and appropriate PPE