How To Flash Window In Concrete Wall

The first half of window flashing occurs when you or your builder preps the rough opening for the window s installation.

How to flash window in concrete wall.

Tek 19 5a flashing details for concrete masonry walls ref. Caulking around the top and sides of window can often provide a temporary fix but over time the caulking will fail. Window flashing is installed at the same time as the window unit. 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.

First consider installation in a wall with an exterior face of foam. Typically flashing a window is a two part process. Read more on window flashing. Fill that space with low expansion polyurethane spray foam.

The second half of window flashing occurs once the window unit is secured and squared within the rough. The first step is to wrap the sill with self adhering flashing. 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. 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.

What is the best type of flashing to use with concrete. Bill palmer an engineer and the editor in chief of concrete construction a sister publication of jlc responds. How to install a window in a concrete wall. 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.

The aluminum flashing shown in horgan. 3 includes such details. Install window in the flashed opening and leave adequate space all around the window for insulation.