Instructions / Assembly

The Python™ 3-IN-1 FlexFit™ Ridge

Vent Installation Instructions

U.S. Pat. No. 7,662,037; U.S. Pat. No. 9,175,480; U.S. Pat. No. D694,394; Canadian Pat. No.

2,776,653 and other foreign patents pending. Tools required; hammer, utility knife, chalk line,

tape measure and circular saw. Applicable to non-woven filtered and non-filtered vents.

Quick Pre-Install Checklist

Contact your local code official before installing Python™ 3-IN-1 FlexFit™ Ridge Vent for

compliance with local requirements.

Please see online Python Vent Calculator App at ___________, to determine how much

ventilation is required.

Install only one type of exhaust vent and remove and plug existing vents including

turbines, gable vents, roof louvers and static vents

The NFVA (Net Free Venting Area) of the eave/intake vents should never be less

than the NFVA of the Python™ 3-IN-1 FlexFit™ Ridge Vent. Improper balancing of the

system could result in weather infiltration and inadequate attic ventilation.

The Python FlexFit Shingle Over Ridge Vent is engineered for use on roof pitches from

2/12 to 12/12.

Installation Tips

1. When installing Python™ 3-IN-1 FlexFit™ Ridge Vent with architectural shingles, caulk

between low areas of shingle and external baffle, don’t plug the weep holes.

2. Cut away any excess shingles and underlayment overlapping the weep holes and properly

seal the edge of the weep hole with sealant (such as roofing cement) ensuring that water

is unable to penetrate the hole under the shingles or roofing underlayment.

3. Run the Python™ 3-IN-1 FlexFit Ridge Vent from end to end to give the roof an attractive

appearance.

4. For truss construction, cut a 1″ slot on each side of the ridge starting a minimum of 12″

from the rake edge of the roof. For roofs with a ridge pole cut a 1″ slot on each side of the

ridge pole starting a minimum of 12″ from the rake edge of the roof or chimney. Cut slot

within 6” of end of wall or hip intersection.

5. Over nailing can distort vent shape and under nailing can cause nails to back out of roof

deck.

12″ Cap Shingle Installations

1. For existing roofs remove cap shingles. Using a chalk line, mark 1″ on both sides of the

ridge (1″ beyond ridge pole) as a guide for cutting a slot in the decking.

2. Cut a plumb slot in roof ridge using a circular saw with the blade set at a depth to cut

through the roof decking only, avoiding cutting trusses and rafters. Remove debris. Seal

the edge of the hole with a sealant (roofing cement).

3. Center the Python™ 3-IN-1 FlexFit™ Ridge Vent over the slot that has been cut in the

ridge, ensuring that the RIDGE VENT support pegs sit flat on the roof. To ensure proper

alignment along the ridge, run a chalk line down both sides of the ridge.

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The Python™ 3-IN-1 FlexFit™ Ridge Vent Installation Instructions U.S. Pat. No. 7,662,037; U.S. Pat. No. 9,175,480; U.S. Pat. No. D694,394; Canadian Pat. No. 2,776,653 and other foreign patents pending. Tools required; hammer, utility knife, chalk line, tape measure and circular saw. Applicable to non-woven filtered and non-filtered vents. Quick Pre-Install Checklist Contact your local code official before installing Python™ 3-IN-1 FlexFit™ Ridge Vent for compliance with local requirements.
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4. Using the 3″ x 0.120″ diameter roofing nails provided, install the vent starting from the outer edge moving inward. Properly secure by using the 12″ nail holes. For aesthetics, we recommend having the female connectors end facing the edge of the roof. 5. As you install more pieces of the RIDGE VENT, ensure that each piece is joined together using the male/female connectors. 6. Cut the final piece to a length long enough so that it is flush with the edge of the roof.