Product Brochure

Python Steep
Slope Ventilation
System
Weather-Tite™
Rolled Ridge Vent
3-IN-1 FlexFit
Ridge Vent
65 Slant
Back Vent
150 Round Vent
Value drives everything we do. That’s why we developed the Python Steep Slope
Ventilation Division. This comprehensive line of products offers easy installation,
remarkable building ventilation, lower utility costs, extended shingle and roof deck life,
extreme durability, and outstanding warranties. Get more quality, more performance,
and more value ....from Python™
800.800.8590 / MarcoIndustries.com
Specs
Net Free Venting Area: ¾" thick: 17.5 sq. in. per
lineal foot of ridge
Material: Highly durable and high performing non-
woven, non-wicking modified polyester. Made
with over 90% recycled plastic and 30% post-
consumer content
Codes & Standards: FBC and CSA approvals
Color: Dark Grey
Nails: Coil of 1¾" Nails
Roof Pitch: Conforms to any pitch from 2/12 to
20/12
Pack Unit of Measurement: 1 per bag
Ridge Vent Roll Sizes: ¾” x 8” x 20’, ¾” x 10.5” x 20’
¾” x 11.75” x 20’, ¾” x 10.5”x 50’, ¾” x 11.75” x 50’
Air Permeability: (ASTM D737) 760 cubic/minute
Tear Strength: ASTM D1294-86
Tensile Strength: ASTM D2261-83
Machine 25 ppi / Counter 25 ppi
Cold Crack Resistance: (GLIT C115) -25°F
Snow Infiltration: (CRL 5704) Zero
Self-Ignition Temperature: (ASTM D1929) 963°F
Weathering: UV stable, polyester composite
Maintenance: Properly installed, maintenance free
Easy Install
1. Use on a minimum 3/8" (10 mm) plywood or OSB
decking.
2. Cut a 2" (51 mm) slot along the ridge, 1" (25.4 mm)
on each side. Leave uncut (closed) sheathing area
of 6" (152 mm) at each end of the ridge. Cut through
sheathing only, avoiding roof trusses. (In houses with a
ridge board, cut 3½" (89 mm) slot, 1¾ on each side.
3. Where short ridges (dormers, ridge intersections) are
used, mark and cut the slot and make sure that the end
of the opening stops at least 12” (305 mm) from the
ridge intersection.
4. Uncoil Python Single Layer Vent along the entire
length of the ridge, covering uncut 6" (152mm)
sheathing area on both ends. Shorter lengths can be
joined by caulking and butting the end.
5. Install cap shingles directly over Python Single Layer
Vent. Use included 1¾" (44.4mm) coil nails. Python
Single Layer Vent has a ¾" (19.1mm) nominal thickness.
Be sure not to crush or compress the vent during
installation.
Proudly Made in North America
See our installation instructions online at MarcoIndustries.com