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Minnesota Administrative Rules


Subpart 1.

Extension above roofs.

Extension of vent pipes through a roof shall be terminated not less than 12 inches above it. Where a roof is to be used for any purpose other than weather protection, the vent extensions shall be run at least seven feet above the roof.

Subp. 2.

Waterproof flashings.

Each vent terminal shall be made watertight with the roof by proper flashing of copper, lead, galvanized iron, or other approved flashings or flashing materials. Vent pipe terminals shall pass through the roof and shall be at least two inches in diameter. When approved by the administrative authority, other materials or methods may be used which provide adequate protection.

Subp. 3.

Location of vent terminal.

No vent terminal shall be located directly beneath any door, window, or other ventilating opening of the building or of an adjacent building nor shall any such vent terminal be within ten feet horizontally of such an opening unless it is at least two feet above the top of such opening.

Subp. 4.

Terminals adjoining high buildings.

In the event that a new building is built higher than an existing building, the owner of the new building shall not locate openable windows, doors, or other ventilating openings within ten feet of any existing vent stack on the lower building unless the owner of such new building shall defray the expenses or shall make such alterations to conform to part 4715.2530, subpart 3.

Statutory Authority:

MS s 326.37 to 326.45; 326B.43 to 326B.49


17 SR 1279; L 2007 c 140 art 6 s 15; art 13 s 4

Published Electronically:

May 14, 2012

700 State Office Building, 100 Rev. Dr. Martin Luther King Jr. Blvd., St. Paul, MN 55155 ♦ Phone: (651) 296-2868 ♦ TTY: 1-800-627-3529 ♦ Fax: (651) 296-0569