Stucco weep screed, a lesser known but crucial component in stucco applications, raises numerous questions among homeowners and construction enthusiasts. This detailed guide aims to demystify stucco weep screed and provide comprehensive insights into its functionality, importance, and usage in line with building regulations.
Understanding Stucco Weep Screed
Stucco weep screed is a specific type of metal flashing situated at the base of stucco walls. Its primary function is to expel moisture through holes at the bottom, ensuring water does not accumulate or damage the wall’s structure. Additionally, it establishes the stucco depth and acts as a control joint for the bottom of stucco walls. This component is essential in preventing water damage to materials like wood, often used in wall construction.
The Purpose and Functionality of Weep Screed
Weep screed’s main role is to guide moisture, absorbed behind the stucco, safely away from the building structure. Positioned below the sill plate, it extends about 1 to 1 1/2 inches to ensure that any draining water reaches the concrete foundation, a more water-resilient material than wood.
Installation and Working Mechanism
Weep screed is a type of flashing with a bent bottom edge and holes along its lower part. It’s mounted on the wall similarly to other flashing types. Stucco, designed to absorb and then evaporate water, may at times release excess water. Here, the weep screed plays a crucial role in directing this water away from the wall, ensuring the structural integrity of the building.
Necessity and Building Code Compliance
The necessity of weep screed can be subjective, but it is a mandated building code in many regions. Compliance with local building codes is essential, especially during inspections. Although some older buildings without weep screed have remained intact, its use is generally advised for optimal stucco application and aesthetics. The decision to use weep screed should always be aligned with local building regulations and exemptions should be verified with local authorities.
Exceptions to Weep Screed Requirements
Weep screed is generally required in wood-framed buildings, particularly new constructions. However, exceptions exist:
- Existing Stucco: Older buildings without weep screed may be exempt during renovations to maintain aesthetic continuity. This should be confirmed with building authorities if building permits are involved.
- Concrete and Block Walls: These materials inherently resist water damage, often negating the need for weep screed.
