Readers ask: What Is A Stucco Weep Screed?

Weep screed is a special piece of metal flashing that runs along the bottom of walls that wicks moisture out of holes that are located at the bottom of the flashing. It hangs below the lower sill plate to ensure that the water wicks past any material that could become damaged by excessive amounts of water.

What is the purpose of a stucco weep screed?

The screed serves as a vent so that the moisture can escape the stucco wall finish just above the foundation.” It terminates the bottom of a cementitious-based thin veneer rainscreen & should allow liquid moisture that drains down the back side of a thin veneer rainscreen to freely exit the thin veneer.

Is a weep screed necessary for stucco?

Weep screeds are generally only used on walls constructed with wood framing, and are not required on stucco-coated masonry structures or when adhered stone is installed over masonry.

Is a weep screed necessary?

Weep screeds are common and code required (IBC Section 2512) for cement plaster over framed walls. Typically they should be set at or below the foundation plate line to allow moisture to exit or “weep” out and to prevent ground moisture from wicking up.

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Does EIFS need weep screed?

Moisture Drainage MD-EIFS PVC accessories are permitted but not required. Most systems have a weep screed (PVC starter track with weep holes), but not all systems.

Should stucco go all the way to the ground?

When installing stucco, you should ensure that it never touches the ground, or in other words, is below-grade. There needs to be a minimum of two inches of space between the concrete and the stucco for houses that rest on concrete foundations.

Does stucco need flashing?

If you install your stucco correctly using these general rules you will not need costly stucco repairs in the future! Flashings are used at roof to wall transitions as well as all wall penetrations (pipes, wires, window, doors etc.) This flashing is often not installed behind the WRB being used on the wall.

What do weep holes do?

The weep holes allow wind to create an air stream through the cavity. The stream removes evaporated water from the cavity to the outside. Weep holes are also placed above windows to prevent dry rot of a wooden window frame.

Can you pour concrete against stucco?

Remember that your stucco is certainly not waterproof and can be permeated by moisture. I would advise against pouring a concrete wall right up against the stucco.

Can water seep through stucco?

Despite what many people think about stucco walls, stucco walls are not water-resistant. As a matter of fact water actually absorbs into the stucco. In most cases, the problem with water leaking through stucco is that the building envelope has been breached.

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What happens when stucco gets wet?

Water leakage is a common issue with stucco in areas where seasonal rain is the norm. If water gets behind stucco it will soften the areas it comes in contact with, eventually causing the stucco to break away and fall off in sheets.

How does stucco work?

Stucco or render is a construction material made of aggregates, a binder, and water. Stucco is applied wet and hardens to a very dense solid. Stucco can be applied on construction materials such as metal, expanded metal lath, concrete, cinder block, or clay brick and adobe for decorative and structural purposes.

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