Flashing 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. 660 i or masterseal awb 970 fib. This article series provides details of foundation tops building walls exterior trim wall corners and roof wall intersection flashing to prevent leaks water damage.

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Tek 19 5a flashing details for concrete masonry walls ref.

Flashing concrete wall.

The same problem occurs where a raised porch or patio slab attaches to the main building. When precast concrete lintels are used in a concrete masonry wall the flashing should be provided in the course immediately above the precast concrete lintel. For example the crevice between concrete stairs and the foundation is a common entry point. In this video i will pro.

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 flashing should extend past the end of the lintel and include an end dam within the concrete masonry. Extend the flashing membrane throughout the rough opening and minimum 4 inches onto the face of the exterior wall. A wall or siding needs special detailing to prevent leaks and damage where the wall encounters any horizontal surface such as a foundation wall top or a concrete porch slab.

The cap flashing is attached to the base flashing by blind riveting. Copper receiver cast in concrete wall. The aluminum flashing shown in horgan. Another method of flashing a concrete wall is to cast the cap flashing into the wall.

3 includes such details. This detail can be used on either a sloped or a flat roof. What is the best type of flashing to use with concrete. Pinhole free flashing membrane with a thickness of 12 30 mils.

Flashing single wythe walls at the ends of bar joists which utilize wall pockets for bearing is shown in figures 8 and 8a. Bill palmer an engineer and the editor in chief of concrete construction a sister publication of jlc responds. See figures 3 7. 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 the design of its individual components.

Properly installed wall flashing is critical to your building s health. Each method of flashing rough openings has unique advantages. An alternate base flashing fastening method is to use cleats spaced at 12 o c. The flashing should turn up on the interior fig.