BASC Search | Building America Solution Center

Proper installation of flashing for drainage

Publication Date

Sun, 10/01/2006 - 12:00

Taped Insulating Sheathing Drainage Planes

Guide describing techniques for installing insulating sheathing as a continuous drainage plane on walls.

Proper shingling of drainage plane materials

Publication Date

Thu, 11/01/2007 - 12:00

Measure Guideline: Guidance on Taped Insulating Sheathing Drainage Planes

Author(s)

Grin Aaron,

Lstiburek Joseph W

Organization(s)

Building Science Corporation,

BSC

Publication Date

September, 2014

Measure Guideline research report providing simple, long term, and durable solutions when using tapes and flashing membranes in conjunction with the exterior face of rigid polymeric foam sheathing to create the drainage plane of a wall system.

Wrong – There is no flashing installed at the bottom of the exterior walls to create a drainage system

Publication Date

Tue, 02/01/2011 - 12:00

The weep holes are spaced at the correct distance to provide a complete drainage system

Publication Date

Tue, 02/01/2011 - 12:00

Wrong – There is no flashing installed at the bottom of the exterior walls to create a drainage system

Publication Date

Tue, 02/01/2011 - 12:00

Right – There is flashing installed at the bottom of the wall to create a satisfactory drainage system

Publication Date

Tue, 02/01/2011 - 12:00

Wrong – The corners are not properly flashed, leaving a vulnerable area in the drainage system

Publication Date

Tue, 02/01/2011 - 12:00

The sheathing has rotted because there was not a sufficient drainage gap behind the stucco cladding

Right – The water-resistant barrier is layered over the step flashing to provide a complete drainage system

Publication Date

Tue, 02/01/2011 - 12:00

The water-resistant barrier, weep screed, and stucco lathe are properly layered and will create a complete drainage system

Publication Date

Tue, 02/01/2011 - 12:00

Proper flashing around windows is especially important when the rigid foam serves as the drainage plane in the wall

Publication Date

Mon, 10/01/2007 - 12:00

Right – The flashing is properly installed to create a complete drainage system with continuous rigid insulation sheathing/siding

Publication Date

Tue, 02/01/2011 - 12:00

Wrong - Stucco has rotted and cracked above a window because of water damage due to lack of proper flashing and drainage.

Publication Date

Tue, 11/12/2019 - 12:00

Right – There is flashing installed along the top of the window and the water-resistant barrier is layered over to create a complete drainage system

Publication Date

Tue, 02/01/2011 - 12:00

Flashing at bottom of exterior walls with weep holes included for masonry veneer and weep screed for stucco cladding systems, or equivalent drainage system

Publication Date

Tue, 02/01/2011 - 12:00

Flashing at bottom of exterior walls with weep holes included for masonry veneer and weep screed for stucco cladding systems, or equivalent drainage system

Publication Date

Tue, 02/01/2011 - 12:00

Flashing at bottom of exterior walls with weep holes included for masonry veneer and weep screed for stucco cladding systems, or equivalent drainage system

Publication Date

Tue, 02/01/2011 - 12:00

Furring strips provide drainage gap behind lap siding; screen is added at bottom and top to prevent entry of insects and wildfire embers.

Publication Date

Thu, 02/01/2018 - 12:00

Rigid foam insulation can serve as the drainage plane when all seams are taped. Furring strips provide an air gap behind the cladding.

Publication Date

Sun, 04/01/2012 - 12:00

Step and kick-out flashing at all roof-wall intersections extending ≥ 4 in. on wall surface above roof deck and integrated with drainage plane above

Publication Date

Tue, 02/01/2011 - 12:00

This basement is insulated on the exterior with rigid foam over dampproofing, with granular backfill and footing drains to facilitate drainage away from the foundation, a termite shield to protect from pests, and cellular PVC to protect the rigid foam.

Publication Date

Mon, 03/01/2021 - 12:00

Install minimum 6" wide self-adhered butyl Z-flashing

Publication Date

Mon, 09/01/2014 - 12:00

Upper wall insulation installation with butyl z-flashing

Publication Date

Mon, 09/01/2014 - 12:00

Tape the joint between the top insulation sheet and the Z-flashing with 2" wide tape to improve air tightness

Publication Date

Mon, 09/01/2014 - 12:00

Clean taping areas and install 3" tape on vertical joint of upper insulation overlapping the horizontal joint

Publication Date

Mon, 09/01/2014 - 12:00

Flashing at Bottom of Exterior Walls

Guide describing how to apply flashing to the bottom of exterior walls to create a continuous drainage plane.

Step and Kick-Out Flashing at Roof-Wall Intersections

Guide describing how to install step and kick-out flashing on roofs.

Flashing of Roof-Wall Intersections in Existing Homes

Guide describing how to install and properly integrate flashing at the intersection of the wall and roof on an existing home.

Flashing of Wall Penetrations in Existing Homes

Guide describing how to install flashing that is integrated with air and water control layers around piping, vents, and other wall penetrations as part of an exterior wall retrofit.

Water Managed Existing Sill Beams and Sill Plates

Guide describing how to insulate the sill beam or sill plate on the exterior side in a way that allows drying to the exterior, as part of an exterior wall upgrade.

Vinyl Siding with Integrated Rigid Foam for Existing Walls

Guide describing the design and installation considerations for recladding of above grade walls using insulated vinyl siding.

Windows and Doors are Fully Flashed

Guide describing how to install flashings to help direct water down and out of windows and doors openings in exterior walls.