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13. Apply a large bead of roofing cement in the molded
groove on the bottom side of ventilator base. Make sure
the arrow on the ventilator base is pointed toward the
roof ridge. Start two-thirds of the way down from the top
of the 27" square and slide the ventilator base under
the shingles. Do not bend the shingles any more than
necessary. Center the ventilator base over the hole.
SCREW UNDER SHINGLES
14. Make sure the ventilator base is parallel to the roof ridge,
carefully lift shingles and screw base securely to the roof
using galvanized #10 x 1" pancake head wood screws.
Screw all corners and around perimeter of base every
6 inches.
MODELS 345RSOBK • 345RSOWW
15. Using a good grade of roofing cement material, seal
shingles and all screw heads. DO NOT seal the bottom
edge of the ventilator base.
16. Position the ventilator dome so the top points toward the
roof ridge and install to the ventilator base using the four
(4) sheet metal screws removed during step 4.
Page 4
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