A well-designed rainscreen system is essential for protecting buildings from moisture damage and ensuring long-term durability. By providing an air gap between the cladding and the building envelope, a rainscreen promotes proper drainage and ventilation, reducing the risk of mold, rot, and structural deterioration. For builders and architects looking to maximize performance, Keene Building Products’ Driwall Rainscreen offers an effective, easy-to-install solution. Here’s how to install a rainscreen system correctly to achieve maximum durability.
1. Understand the Importance of a Rainscreen System
Moisture intrusion is one of the leading causes of building envelope failure. A rainscreen system mitigates this risk by:
- Allowing drainage of water that penetrates the exterior cladding.
- Creating a ventilated space to promote drying.
- Preventing trapped moisture that can lead to mold and decay.
Keene Building Products’ Driwall Rainscreen is engineered with a three-dimensional matrix that provides superior drainage and ventilation, making it an ideal choice for various siding applications, including stucco, stone veneer, fiber cement, and wood.
2. Select the Right Drainage Mat
Choosing the right drainage mat is crucial for rainscreen performance. Driwall Rainscreen comes in multiple thicknesses to accommodate different cladding materials and project requirements. It features an entangled net design that maintains an open cavity for optimal airflow and moisture drainage.
Factors to Consider:
- Cladding Type: Thicker mats may be necessary for materials like stone and stucco.
- Climate: High-moisture regions benefit from enhanced ventilation.
- Building Code Compliance: Ensure the product meets local building codes.
3. Proper Installation Techniques
Step 1: Prepare the Building Envelope
Before installing the rainscreen, ensure the weather-resistant barrier (WRB) is properly applied over the sheathing. The WRB provides an additional layer of moisture protection.
Step 2: Install the Driwall Rainscreen
- Roll out Driwall Rainscreen over the WRB, starting from the bottom and working upward.
- Secure the mat using stainless steel staples or corrosion-resistant fasteners.
- Overlap horizontal seams by at least 3 inches to maintain continuous airflow.
Step 3: Apply Furring Strips (If Required)
For some installations, furring strips may be necessary to create a consistent cavity depth. However, Driwall Rainscreen’s self-supporting structure often eliminates the need for additional furring.
Step 4: Install Cladding
Follow manufacturer guidelines for siding installation, ensuring proper fastening and spacing to maintain the integrity of the rainscreen system.
4. Ensure Proper Ventilation
A successful rainscreen system requires air circulation. Driwall Rainscreen naturally promotes airflow, but it’s essential to:
- Leave ventilation gaps at the top and bottom of the wall assembly.
- Use insect screens to prevent pest intrusion while maintaining airflow.
- Avoid blocking the drainage plane with caulking or foam insulation.
5. Regular Maintenance and Inspection
To ensure long-term performance, periodically inspect the rainscreen system for:
- Debris buildup in drainage gaps.
- Cladding movement or damage.
- Proper water shedding away from the building foundation.
Conclusion
Installing a rainscreen system correctly is key to preventing moisture-related damage and enhancing building longevity. Driwall Rainscreen from Keene Building Products simplifies the installation process while providing superior drainage and ventilation. By following these best practices, builders and architects can confidently create durable, moisture-resistant wall assemblies.
