Static Roof Vents
1.) POSITIONING THE VENTS ON THE ROOF
Position the vents evenly spaced across the roof, below the ridgeline so that the vents can
only be seen from one side of the house, yet no greater than 2 feet below the ridgeline.
2.) DRILL THE GUIDE HOLE
Adjust placement of the vents to avoid drilling through any rafters. Drill a guide hole near the
center position of each vent.
3.) OUTLINING THE HOLE
Mark correct diameter for the vent you have selected using the chart below.
4.) CUTTING THE HOLE IN THE ROOF
Using a saber saw, cut and remove all the roof shingles (and deck) inside the diameter circle you
have marked. Next, cut back approximately 1-inch of the SHINGLES ONLY out of the top half of
the hole to allow room for placing and positioning the flange.
5.) POSITIONING THE BASE
Make sure the base flange parallels the ridgeline of the roof. Slip the upper half of the flange
under the shingles. Center the unit over the hole. When installing the B-144 make sure the dome
is level with the roof line. For the RVP61, SLP61 AND SQP61 the shingles should stop at the
midpoint of the flange while still covering the nails. For all static roof vents the shingles should lay on top
of the flange all the way down to the lower side of the opening. The flange from this point should
rest on top of the shingles.
attaching the vent to the
If nail holes are provided in the vent they should be used for
roof deck.
6.) SECURING THE BASE
Attach the flange securely to the roof with at least 8 galvanized roofing nails. Nails should be at
least 2
" long and should penetrate the vent, shingles and decking. Use a nail in each corner of
the flange and along the middle of each side of the vent. Use caulk to seal around each nail. If
flange ribbing is present, vents should be shingled down to side flange ribbing only.
Size of Opening
Model Description
Net
Free Area
Roof
Pitches
Diameter of
Opening
B-144 round plastic or metal 144 sq. inches 3/12 to 8/12 14"
SLP 61 slant plastic 61 sq. inches 3/12 to 12/12 9"
SLA / RVG55 slant aluminum / galvanized 50 sq. inches 3/12 to 12/12 8"
RVAL50 / RVGL50 slant aluminum / galvanized 50 sq. inches 3/12 to 12/12 8"
SQP61/RVP61 square plastic 61 sq. inches 3/12 to 8/12 9"
RVA51 / RVG51 square aluminum / galvanized 50 sq. inches 3/12 to 8/12 8"
RVA40 / RVG40 slant aluminum / galvanized 40 sq. inches 3/12 to 12/12 7-½"
RVHC51 /
RVG53
square high collar
aluminum or galvanized
50 sq. inches 3/12 to 8/12 8"
UH50 / 550 square aluminum / galvanized 50 sq. inches 3/12 to 8/12 8"
Part No. 18943
Use the following chart to determine proper size of opening, based on the model of vents you are installing.
INSTALLATION INSTRUCTIONS
SLP150 slant plastic
150 sq. inches 3/12 to 12/12
13" x 13" square
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