How To Flash Window In Concrete Wall

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.

How to flash window in concrete wall.

3 includes such details. Read more on window flashing. 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. Typically flashing a window is a two part process.

First consider installation in a wall with an exterior face of foam. Caulking around the top and sides of window can often provide a temporary fix but over time the caulking will fail. The first half of window flashing occurs when you or your builder preps the rough opening for the window s installation. Fill that space with low expansion polyurethane spray foam.

Flashing single wythe walls at the ends of bar joists which utilize wall pockets for bearing is shown in figures 8 and 8a. 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. Tek 19 5a flashing details for concrete masonry walls ref. What is the best type of flashing to use with concrete.

The first step is to wrap the sill with self adhering flashing. 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. In a concrete wall without wood framing install the window framework by fastening it into the concrete wall with self tapping concrete screws. Bill palmer an engineer and the editor in chief of concrete construction a sister publication of jlc responds.

Window flashing is installed at the same time as the window unit. 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. How to install a window in a concrete wall.