Installation Guide

ManualsBrandsGAF ManualsRoof Ridge Vents2028000

This will help keep the seam area attached to the hip rafter for increased strength.

The air slot can be widened, in this case, to

” (15.9 mm) on each side of the hip

rafter to maintain proper NFVA.

Subsequent Air Slots: After the top hip air slot is cut, working down the hip, leave

12” (305 mm) of uncut hip. Mark and cut another 2 ½” x 36” (64 mm x 914 mm) air

slot centered on the hip to provide a ½” x 36” (13 mm x 914 mm) opening on each

side of the hip rafter. Continue marking and cutting separated hip air slots, as needed,

until reaching the midpoint of the hip. Depending on the length of the roof’s hip and

ventilation needs, the bottom hip slot nearest the midpoint may be less than 36” (914

mm) in length. Always remember: Do NOT cut slots closer than 24” (610 mm) to the

building’s warm exterior wall.

NOTE: Re-nail or reinforce any tongue-and-groove decking or plywood/OSB sheathing

in the area of the hip air slots, as needed.

STEP 3 – Cobra

Hip Vent Installation

For a uniform appearance, install Cobra

Hip Vent over the entire length of the hip,

making sure that the vent always extends past the bottom and top hip slot openings

by at least 12” (305 mm).

Install two cap shingles at the base of the hip (nearest the eave edge); these cap

shingles will be underneath the lowermost section of Cobra

Hip Vent. This application

helps to ensure that the end of the hip at the eave edge is weather resistant.

Starting at the bottom of the hip nearest the eave: Center and conform Cobra

Hip Vent over the shingles, placing it firmly against the roof surface.

IMPORTANT! Always be sure that Cobra

Hip Vent is oriented so that the “Towards

Peak” arrows on the top surface of the vent point towards the peak of the roof. This

orientation is critical to help prevent weather infiltration and leaking.

With Cobra

Hip Vent properly oriented, fasten the vent in place using the included

” (44 mm) pneumatic coil nails (use longer nails if necessary). Nails must always

penetrate through plywood or OSB decks or at least

” (19 mm) into wood planks

and should be driven flush with the surface of the Cobra

Hip Vent. The suggested

pneumatic nail gun air pressure is 95-100 PSI. However, a higher or lower pressure

adjustment may be necessary to prevent overdriving or underdriving the nails.

Attach the first Cobra

Hip Vent section using appropriate coil nails at the pre-marked

6” (152 mm) increment nail gun targets. These targets are marked “Fasten Vent Here”

on the vent.

Continue fastening Cobra

Hip Vent up the hip towards the peak. Apply the subsequent

sections using the vent’s overlap/underlap tabs.

NOTE: For maximum weather resistance, always ensure that Cobra

Hip Vent is

fastened tightly and snugly to the roof shingles below.

STEP 4 – Hip Termination & Ridge Intersections

Installations Without Ridge Vent: Terminate the top Cobra

Hip Vent section

at the top of the hip and approximately level to the ridge line. The top vent sections

from adjacent hips should be joined and mitered together tightly. Install a 3” x 12”

(76 mm x 305 mm) strip of self-adhering leak barrier over all the junctions between

the mitered vents.

Installations With Ridge Vent: Always install the ridge vent before the Cobra

Hip Vent. Cut out the template printed on the outside of the Cobra

Hip Vent package.

See the Cobra

Hip Vent to Ridge Vent Miter Cut Instructions included inside

the package.

With the top section of the Cobra

Hip Vent properly sized and butted tightly to the

ridge vent, fasten in accordance with Step 3. Install a 3” x 12” (76 mm x 305 mm)

strip of self-adhering leak barrier over all junctions between the hip vent and ridge

vent. Proceed with installing cap shingle.

STEP 5 – Cap Shingle Installation

Install the cap shingles directly over the Cobra

Hip Vent, using 1

” (44 mm) pneu-

matic coil nails (included) or longer nails if necessary. Follow the nail line on the top of

the vent to make sure to fasten the cap shingles in the right location.

3” x 12” (76 mm x 305 mm) strips of self-adhering leak barrier over all junctions

between the hip vent and ridge vent