How To Flash Window In Concrete Wall

Install in brick walls at the base of walls above all window and door lintels and above shelf angles.

How to flash window in concrete wall.

Beyond the corner boards. The asphalt felt paper should go over the sheathing wrap which should also wrap the corners at least 6 in. Apply a thick bead of maxflash in a zigzag pattern to the rough opening and onto the exterior wall. Allow the foam to cure for at least one hour before trimming the excess.

Flashing single wythe walls at the ends of bar joists which utilize wall pockets for bearing is shown in figures 8 and 8a. Typically flashing a window is a two part process. Install flashing at the bottom edge of the exterior above grade wall and overlap with weather resistant barrier. The second half of window flashing occurs once the window unit is secured and squared within the rough.

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. A simple approach that works well is to add a spline of asphalt felt paper at outside corners that extends 6 in. How to install a window in a concrete wall.

The first half of window flashing occurs when you or your builder preps the rough opening for the window s installation. 3 includes such details. Inside corners also benefit from a spline see illustration. Take care not to damage the window with excessive shim pressure.

Spread maxflash evenly creating a continuous void and pinhole free flashing membrane with a thickness of 12 30 mils. Window flashing is installed at the same time as the window unit. A sheet waterproofing membrane or water resistive barrier is utilized to flash over the back leg of the metal flashing see figure 4. Lower the window into the framed opening inserting the bottom window edge first then tipping in the top.

Apply expanding foam to the window frame gap created by the shims. At the base of walls a sheet metal flashing assembly that extends from the face of the backup wall through the masonry should be used to form a drip outside the wall.