Optima Company 45 - 3 manual Optima, Roof Pitch

Optima 45 - 3 16

VENTING - VERTICAL TERMINATION USING SIMPSON DURA-VENT PIPE

NOTE:

•Galvanized pipe is desirable above the roofline due to its higher corrosion resistance. Continue to add pipe sections throughout the flashing until the height of the vent cap meets the minimum height requirements specified in Fig. 5 or local codes.

•For steep roof pitches, the vertical height must be increased. A poor draft, or down drafting can result in high wind conditions, trees or neighbor's roof lines. In these cases increasing the height may solve a drafting problem. REMEMBER to check that you are within the maximum vertical height restrictions, and are placing the appropri- ate vent restrictors as outlined in the venting chart within this manual.

•Any storage spaces or closets which the vent must pass through must be enclosed.

Roof Pitch	Minimum Vent Height
Flat to 7/12	2 Feet	0.61 Meters
Over 7/12-8/12	2 Feet	0.61 Meters
Over 8/12-9/12	2 feet	0.61 Meters
Over 9/12-10/12	2.5 Feet	0.76 Meters
Over 10/12-11/12	3.25 Feet	1.00 Meters
Over 11/12-12/12	4 Feet	1.22 Meters
Over 12/12-14/12	5 Feet	1.52 Meters
Over 14/12-16/12	6 Feet	1.83 Meters
Over 16/12-18/12	7 Feet	2.13 Meters
Over 18/12-20/12	7.5 Feet	2.29 Meters
Over 20/12-21/12	8 Feet	2.44 Meters