Attic Breeze 254D Посібник з монтажу - Сторінка 3

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Installation Instructions (continued)

Step 6 - Marking the Attic Hole: Depending on roofing type (i.e. tile, metal roofing etc.),

remove roofing material around the desired installation area to expose the roof decking.

Insert a screw part-way into the roof decking in the approximate center of the area chosen to

install the attic vent. Tie one end of string to a permanent marker, and the other end to the

screw. The knot tied to the screw should allow the string to move freely in a circle. Adjust the

length of the string so that when the marker is pulled tight, it measures 10 inches from the

screw. Keeping tension on the string, trace out a circle onto the roof decking. The resulting

circle will have a diameter of 20 inches.

Step 7 - Cutting the Attic Hole: Using a power drill equipped with a ½ inch drill bit, drill a

hole anywhere along the circle that was previously traced out during Step 6. This will be a

pilot hole for the reciprocating saw. Following the circle pattern, insert the reciprocating saw

into the pilot hole and cut out the hole in the roof. When the cutting is complete, clear away

any remaining pieces of wood from the sides of the hole and rafters.

DO NOT CUT THROUGH ANY ROOFING RAFTER OR FRAMING MEMBER. ONLY CUT

AND REMOVE THE ROOF SHEATHING. This can be accomplished by adjusting the

reciprocating saw so that it does not cut deep enough to cut into the rafters or framing

members. Alternatively, if your saw cannot be adequately adjusted, you must cut around any

rafters or framing members which may be located near the attic hole. This may require

drilling additional pilot holes.

Step 8 - Mounting the Curb Box: Position the curb box

over the attic hole. The box should be squared with the

ridge line of the roof. Using the power drill, screw/nut driver

bit, and self-tapping screws, secure the curb box to the roof

decking. Tow in the self-tapping screws at a 45° angle,

starting from the inside wall of the curb box and drilling

through to the roof decking. It is recommended to use 4

inch self-tapping screws for this procedure.

MAKE SURE THAT THE CURB BOX IS SECURELY

Fig. 2 - Mounting the Curb Box

FASTENED TO THE ROOF DECKING. The curb box will

be the primary anchor holding the attic vent to the roof.

Step 9 - Flashing the Curb Box: Flash the curb box using

the most appropriate flashing material for your specific roof

type (see Fig. 3 for common curb flashing materials).

Replace tiles or metal roofing, leaving enough working space

between the edge of the tiles and the curb box so that the

flashing can be slipped into place.

Install the sill flashing first. Screw or nail the flashing into the

curb box. DO NOT NAIL THE FLASHING TO THE ROOF

DECKING. Next, install the side flashing and fasten it in

place. If using step shingles, slip them under each row of

roofing tiles, working your way up from the bottom. Slip the

base of the head flashing under the roofing tiles and set it in

place over the top of the side flashing. Screw the head

flashing into the curb box.

Fig. 3 - Flashing the Curb Box