Flashing Into Concrete Wall

Some of these critical locations include the top of walls and parapets at all horizontal obstructions such as over openings beneath sills above shelf angles at the base of walls and in walls at. This concrete spandrel condition can be used if there is a large distance from the top of the concrete to the shelf angle. 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.

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Flashing is recommended for all locations where moisture may potentially penetrate into a wall and where the free drainage of water is blocked.

Flashing into concrete wall.

Dissimilar metals should not be in contact. 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. Copper receiver cast in concrete wall. Concrete screws come in 3 16 and 1 4 inch diameter in lengths up to 3 3 4 inches.

A sheet waterproofing membrane or water resistive barrier is utilized to flash over the back leg of the metal flashing see figure 4. Both hex head and phillips head styles are available. The best solution is a preformed or custom bent kick out flashing to divert the water away from the siding. This article series provides details of foundation tops building walls exterior trim wall corners and roof wall intersection flashing to prevent leaks water damage.

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. The cap flashing is attached to the base flashing by blind riveting. Where the step flashing terminates along a sidewall is a common trouble spot for moisture problems. Spread out mortar on the masonry with a caulking gun.

An alternate base flashing fastening method is to use cleats spaced at 12 o c. This small piece of metal will cover over the seams and create a way for water to run off. They can be used in concrete block and brick. Another method of flashing a concrete wall is to cast the cap flashing into the wall.

To better protect your masonry or roof structure from the water you should install a flashing cap. Step 7 install flashing cap. In areas where snow may build up add a wide band of peel and stick membrane over the step flashing but under the sheathing wrap as shown. The flashing at the shelf angle is inserted into a reglet cast into the concrete and held with lead wedges.

Press the cap into the mortar and seal by running your finger along. Flashing single wythe walls at the ends of bar joists which utilize wall pockets for bearing is shown in figures 8 and 8a. This detail can be used on either a sloped or a flat roof.

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