Broan ROOF-MOUNT CURB SOLAR POWERED ATTIC VENTILATOR 355CSOBK - Manual (Page 3)

MODELS 355CSOBK • 355CSOBR
Page 3
9. Drill a large starting hole for the sabre saw just inside of
the line or the 14" circle.
10. Cut out the roof board(s) inside of the line.
8. Use the guide hole as a center point, use a nail and
string to scribe a 14” diameter circle on the black paper
or roof decking.
6. Taking into consideration the thickness of your chosen
flashing material, build a 19-1/4” x 16-1/8” (outside
dimensions) curb out of 2” x 4” or 2” x 6” material.
20”
17”
7. Working from the outside of your roof, use the guide
hole as a center point, cut and remove roofing material
in a 20” x 17” minimum area.
19-1/4"
2" MIN.
16-1/8"