What is a Rainscreen?
A rainscreen is a critical exterior wall feature that creates a ventilated air space between the cladding and a water-resistive barrier or house wrap. This design significantly reduces the risk of wall rot by preventing water and moisture vapor from being driven into the wall cavity by external forces such as wind, sunlight, and pressure differentials. By incorporating a rainscreen drainage mat, buildings benefit from improved moisture control and long-term durability.
Sidewall Rainscreen and Façade Ventilation
Our Sidewall Rainscreen products ensure that the back side of the siding remains free of moisture accumulation, especially during colder months. Additionally, these systems provide an essential drainage channel for any water that penetrates exterior materials. Studies show that effective rainscreen ventilation serves as a powerful drying mechanism, extending the lifespan of the exterior while enhancing the building’s interior air quality.
Benefits of Effective Rainscreen Ventilation
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Prevents Moisture Intrusion – Stops water from seeping into the structure.
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Facilitates Drainage and Ventilation – Creates a dedicated cavity for both water runoff and air circulation.
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Directs Water to Weep Holes – Ensures a controlled drainage path for moisture escape.
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Supports Airflow for Drying – Allows warm air to rise and exhaust at the top.
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Redistributes Moisture – Enhances evaporation and diffusion to manage humidity.
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Provides a Capillary Break – Limits wicking at the back of the siding.
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Minimizes Damage at Leak Points – Reduces localized water concentration that can lead to structural issues.
Compatible Applications
BonarBuilt's sidewall ventilation solutions are designed for use with various exterior materials, including:
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Stucco
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Brick
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EIFS (Exterior Insulation and Finish Systems)
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Wood Siding
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Vinyl Siding
Improve Building Performance with Rainscreen Technology
Incorporating a rainscreen drainage mat into a building’s design is a proactive approach to moisture management, energy efficiency, and structural longevity. Whether for new construction or renovations, BonarBuilt’s sidewall ventilation solutions ensure long-lasting protection against moisture-related damage.
Contact us today to learn more about how our rainscreen products can enhance the durability and performance of your building!
Please visit the Rain screen product page here
