Bellevue | Cougar Mountain Open-Joint Rainscreen Exterior
Project Overview
Located in the Cougar Mountain neighborhood of Bellevue, this project focused on upgrading the home’s exterior with a modern, high-performance rainscreen system designed to improve durability, moisture management, and long-term performance.
Synapse Construction was brought in to install a contemporary open-joint siding system while also upgrading the home’s windows, creating a cohesive exterior envelope solution well suited to the Pacific Northwest climate.
Scope of Work
Open-Joint Rainscreen Siding System
-
Installation of a modern open-joint rainscreen assembly
-
Integration of multiple exterior materials for visual depth and performance
-
Careful detailing to support ventilation and moisture control behind the cladding
Window Replacement
-
Removal of existing windows
-
Installation of all new Seattle replacement windows
-
Coordination of window integration with the new exterior envelope
Materials & Systems
Pre-Treated Cedar Siding
-
Pre-treated 1×4 cedar used for durability and dimensional stability
-
Installed as part of an open-joint system to allow airflow and drainage
-
Adds warmth and natural texture to the modern façade
Cembonit Cement Board Panels
-
Cement board panels incorporated between cedar elements
-
Provides a clean, contemporary contrast to the wood siding
-
Durable, low-maintenance material suited for rainscreen applications
Milgard Ultra Windows
-
Pre-painted Milgard Ultra fiberglass windows
-
Selected for durability, energy efficiency, and clean modern lines
-
Integrated into the rainscreen system for proper flashing and waterproofing
Final Outcome
The completed Cougar Mountain exterior delivers a modern, durable envelope that balances aesthetics with performance. By combining pre-treated cedar, cement board panels, and a ventilated rainscreen system, Synapse created an exterior designed to manage moisture effectively while maintaining a refined architectural appearance.
This Bellevue project highlights the benefits of pairing thoughtful material selection with proper envelope construction—ensuring the home performs as well as it looks for years to come. Contact us today!
— Synapse Construction | Building Envelope Specialists
