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Python™ Single-Layer Vent

Our recycled polyester, single-layer ridge vent can be used under ridge caps, ridge shingles and as a fascia vent to keep attics cooler in summer and dryer in winter. Ideal for all roof applications, Python helps reduce utility costs, and its non-wicking performance helps keep out insects, dust and moisture. Miami-Dade County Approved*, Python is backed by a limited lifetime warranty.
Made With Recycled Material

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Python is not fabric covered and comes in a coil. It’s a strong, durable, modified polyester and can be used under ridge caps, under ridge shingles and as a fascia vent with all roof applications. Python’s non-woven, non-wicking, fiber-based matting has no external baffle, which greatly reduces dirt and snow trapping. When used as a fascia vent, Python helps eliminate mold build-up. As a ridge vent, it helps keep out insects, dust and moisture. This versatile product allows fresh air to be drawn into the attic and hot or stale air from inside to be drawn out through the ridge vent, reducing utility costs year-round.

Net-Free Area for 3/4”: 18 sq. in. per lineal foot of ridge*
Net-Free Area for 1”: 19.4 sq. in. per lineal foot of ridge*
Air Permeability: (ASTM D737) 760 cubic feet per minute
Tear & Tensile Strength: (Tear: ASTM D1294·86, Tensile: ASTM D2261·83) Machine 25 ppi / Counter 25 ppi
Self-Ignition Temperature: (ASTM D1929) 963°F
Cold Crack Resistance: (GLIT C115) -25ºF
Snow Infiltration: (CRL 5704) –0–

*Effective Net Free Area varies based on product height, panel profile, and installation methods.

How To Install

Python is made from recycled polyester, so you can be confident you’re using a green building product. Python is light and flexible, so it’s easy to handle and to install. And you can use every piece, so there’s virtually no waste.

Step 1

If not pre-cut, use a circular saw and carbide blade to open a 2” slot (1” on each side of ridge) starting and ending 6” from where hip and ridge vent begin and end. (For roof with center beam, open a 3 1/2” slot, 1 3/4” on each side of the ridge.)

Step 2

Cover entire ridge with Python material along the entire length of the slot.

Step 3

Use roofing nails to tack the vent in place and caulk ends together if ridge length is longer than a roll of Python. Install ridge caps over the Python ridge vent, taking care to not overdrive roofing nails.

More Ventilation

Learn about our other ventilation products featuring our exclusive nonwoven polyester material, for long-lasting resiliency, moisture prevention and energy efficiency.


Dig deep with technical tools, reference charts, installation videos, and more.