This article series provides details of foundation tops building walls exterior trim wall corners and roof wall intersection flashing to prevent leaks water damage.
Wall and concrete flashing.
Each method of flashing rough openings has unique advantages.
An alternate base flashing fastening method is to use cleats spaced at 12 o c.
Lead flashing is non reactive for the most part but it comes with its own intrinsic challenges because of its toxicity.
Many builders and designers believe that inadequate vapor barriers are the main cause of moisture problems and wood decay in walls.
Copper receiver cast in concrete wall.
The cap flashing is attached to the base flashing by blind riveting.
Water can penetrate through transverse joints in the copings or be adsorbed.
Another method of flashing a concrete wall is to cast the cap flashing into the wall.
Pinhole free flashing membrane with a thickness of 12 30 mils.
For example the crevice between concrete stairs and the foundation is a common entry point.
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.
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.
3 includes such details.
Properly installed wall flashing is critical to your building s health.
See figures 3 7.
Extend the flashing membrane throughout the rough opening and minimum 4 inches onto the face of the exterior wall.
Yet another option is to avoid metal flashing altogether and to use a pvc or rubberized asphalt product.
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.
Flashing single wythe walls at the ends of bar joists which utilize wall pockets for bearing is shown in figures 8 and 8a.
Masonry copings copings constructed with stone precast concrete or masonry should not be considered watertight.
In this rogue episode matt will show you a method to waterproof this very tricky transition between a wall and flat concrete slab.
Tek 19 5a flashing details for concrete masonry walls ref.
The same problem occurs where a raised porch.
660 i or masterseal awb 970 fib.
