1.1 	A bill for an act
1.2 	relating to building codes; requiring pan flashing under all exterior windows and 
1.3 	doors;proposing coding for new law in Minnesota Statutes, chapter 16B.
1.4 	BE IT ENACTED BY THE LEGISLATURE OF THE STATE OF MINNESOTA:

1.5 	Section 1. [16B.6151] PAN FLASHING.
1.6 		Subdivision 1.Definitions. "Pan flashing" means a type of corrosion-resistive 
1.7 	flashing that is integrated into the building envelope at the base of a window or door rough 
1.8 	opening and that diverts incidental water to the exterior of the cladding or to the exterior 
1.9 	surface of a concealed weather resistive barrier.
1.10 		Subd. 2.Requirement. An approved pan flashing must be provided under all 
1.11 	exterior windows and doors. Pan flashing must be: (1) sloped to drain water to the 
1.12 	exterior of the cladding or the exterior surface of a concealed weather-resistive barrier; 
1.13 	or (2) flat with sealed back dam and side dams to prevent re-entry of water into the wall 
1.14 	cavity or onto interior finishes.
1.15 	Pan flashing made from metal must be thermally isolated from the interior surfaces.
1.16 		Subd. 3.Exceptions. The requirement in subdivision 2 does not apply to:
1.17 	(1) windows or doors where the manufacturer's written installation instructions 
1.18 	require an alternate flashing method;
1.19 	(2) windows or doors in detached accessory structures;
1.20 	(3) skylights or bow or bay windows;
1.21 	(4) doors required to meet accessibility requirements that would prevent the 
1.22 	installation of pan flashing; and
1.23 	(5) repairs or replacement of existing windows and doors.
2.1 		Subd. 4.Building code. The commissioner of labor and industry shall include the 
2.2 	requirements of this section in the next revision of the State Building Code.