Flashing Concrete Block Wall

As walls heat up some membranes don t hold their shape and can actually become deformed in the cavity this allows moisture to remain trapped instead of proper evacuation with the air barrier installed.

Flashing concrete block wall. This flashing membrane should be upturned on the interior side of the wall so as to catch and drain the water outward and extend out of the exterior side of the wall. Metal roof flashing is a galvanized sheet metal bent at right angles with about eight to 12 inches on each side of the angle. In this rogue episode matt will show you a method to waterproof this very tricky transition between a wall and flat concrete slab. 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.

3 includes such details. Tek 19 5a flashing details for concrete masonry walls ref. This detail can be used on either a sloped or a flat roof. The through wall flashing should span the airspace or cavity while holding its shape without a structural member underneath for support.

Cuts labor and material costs associated with using membrane flashing in a multi wythe course by approximately 50. Another method of flashing a concrete wall is to cast the cap flashing into the wall. Copper receiver cast in concrete wall. Applicable in all cmu wall flashing locations including base of wall parapet walls and above bond beams wall openings and structural steel members.

It is commonly used in two story and side split houses. The size of the trench and diameter of the rebar depends on the purpose for the wall such. The cap flashing is attached to the base flashing by blind riveting. Exterior wall flashing the other reason for the joist flashing is to catch any moisture that is draining down within the wall and direct it outward away from the building.

Footers for block walls consist of a footing trench steel reinforcement rods rebar and concrete. Metal roof flashing can be use to seal gaps between roof walls. These kinds of houses often have a roof that butts against a wall. 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.

Flashing single wythe walls at the ends of bar joists which utilize wall pockets for bearing is shown in figures 8 and 8a.