How To Flash Window In Concrete Wall

Although flashing is the primary focus of this tek it should be understood that the role of vapor retarders air barriers and insulation are also important elements to consider for any wall design as the performance of the entire system can be dependent on.

How to flash window in concrete wall.

Install window in the flashed opening and leave adequate space all around the window for insulation. 3 includes such details. Caulking around the top and sides of window can often provide a temporary fix but over time the caulking will fail. Seeing doug horgan s photos of corroded aluminum flashing in repairing a stone patio over a living space jul 16 left me concerned about using metal flashing with concrete.

Bill palmer an engineer and the editor in chief of concrete construction a sister publication of jlc responds. Typically flashing a window is a two part process. The aluminum flashing shown in horgan. How to install a window in a concrete wall.

Window flashing is installed at the same time as the window unit. Additional information for flashing single wythe walls particularly architectural concrete masonry walls and means for providing a higher level of structural continuity at flashings is contained in tek 19 2a ref. Tek 19 5a flashing details for concrete masonry walls ref. The first step is to wrap the sill with self adhering flashing.

Flashing single wythe walls at the ends of bar joists which utilize wall pockets for bearing is shown in figures 8 and 8a. The first half of window flashing occurs when you or your builder preps the rough opening for the window s installation. Although flanged windows were designed for installation in wood frame walls the task can be just as convenient and sound in concrete walls if proper procedure is followed. Fill that space with low expansion polyurethane spray foam.

First consider installation in a wall with an exterior face of foam. Read more on window flashing. For example if the windows are flashed incorrectly then siding must be removed around each window to re flash them correctly and properly integrate the flashing with the sheathing wrap such as tyvek.