Wall And Concrete 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.

Wall and concrete flashing.

Yet another option is to avoid metal flashing altogether and to use a pvc or rubberized asphalt product. This article series provides details of foundation tops building walls exterior trim wall corners and roof wall intersection flashing to prevent leaks water damage. For example the crevice between concrete stairs and the foundation is a common entry point. Water can penetrate through transverse joints in the copings or be adsorbed.

This detail can be used on either a sloped or a flat roof. 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. Each method of flashing rough openings has unique advantages. An alternate base flashing fastening method is to use cleats spaced at 12 o c.

Another method of flashing a concrete wall is to cast the cap flashing into the wall. Properly installed wall flashing is critical to your building s health. See figures 3 7. Many builders and designers believe that inadequate vapor barriers are the main cause of moisture problems and wood decay in walls.

The same problem occurs where a raised porch. Copper receiver cast in concrete wall. Pinhole free flashing membrane with a thickness of 12 30 mils. In this rogue episode matt will show you a method to waterproof this very tricky transition between a wall and flat concrete slab.

3 includes such details. Lead flashing is non reactive for the most part but it comes with its own intrinsic challenges because of its toxicity. Tek 19 5a flashing details for concrete masonry walls ref. Extend the flashing membrane throughout the rough opening and minimum 4 inches onto the face of the exterior wall.

The cap flashing is attached to the base flashing by blind riveting. If the window or door is near the base of the wall the flashing should form a continuous envelope and be connected to the adjacent wall flashing. Flashing single wythe walls at the ends of bar joists which utilize wall pockets for bearing is shown in figures 8 and 8a. Another metal flashing that is used with concrete and masonry in many parts of the country is lead.