SOFFITS
Design clean, durable wood soffits with hidden fastening.
SOFFITS
Build with Grad systemsÂ
What are Soffits?
Architectural Continuity
Wood soffits create a seamless transition between façades and ceilings, extending the warmth and character of natural wood throughout the building envelope.
Protected Exterior Ceilings
Installed beneath roof overhangs, canopies, balconies, and entrances, soffits protect structural elements while providing a refined finished appearance.
Ventilation
Properly designed wood soffits can promote airflow within roof assemblies, helping manage moisture and contributing to the long-term performance of the building envelope.
Hidden Fastening
Concealed fastening systems eliminate visible screws or nails, creating clean architectural lines that emphasize the beauty of the wood rather than the hardware.
Design Versatility
Wood soffits can be installed in a variety of board widths, profiles, and orientations to complement both contemporary and traditional architectural styles.
Durability
When paired with durable wood species and a corrosion-resistant substructure, wood soffits provide long-lasting performance in demanding exterior environments.
Low Maintenance
A well-designed hidden fastening system allows individual boards to be replaced if needed while minimizing ongoing maintenance and preserving the ceiling’s appearance.
Denmark
The Challenge of Open-joint cladding
Traditional wood siding installation often relies on face fastening or direct attachment to battens. While effective, these methods can create challenges:
Weather-Resistant Barrier Exposure
Because the joints are intentionally left open, the weather-resistant barrier (WRB) is partially visible behind the cladding and receives more exposure to sunlight and moisture than in closed-joint systems.
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Moisture Management
Wind-driven rain can pass through the open joints, making the rainscreen assembly—not the wood cladding—the primary defense against water intrusion.
Precise Board Alignment
Even small installation errors become highly visible in an open-joint façade. Inconsistent spacing or misaligned boards can compromise the architectural appearance.
Board Movement
Wood naturally expands and contracts with changes in temperature and moisture. In open-joint installations, this movement can alter the appearance of the gaps if not properly accommodated.
Wind Loads
Open-joint façades may be subject to significant wind pressures and suction forces, particularly on taller buildings or in coastal regions.
France
Main Profiles for Soffits
Assembly examples:
Explain the Rainscreen Advantage
Designed Around Ventilated Façade Principles
Exterior
- Wood siding boards for soffits
- Grad concealed fastening system
- Aluminum rails
- Ventilated cavity
- Secondary structure
- Weather-resistant barrier
- Structural wall
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Interior
The ventilated cavity behind the siding allows continuous airflow and drainage, helping manage moisture and improving the long-term performance of both the wood cladding and the building envelope.
Grad systems for soffits
The Grad rail system creates a consistent cavity behind the wood boards, allowing air circulation while maintaining precise board alignment and clean installation lines.
Clean architectural aesthetics
Hidden clips eliminate visible screw heads, creating smooth, uninterrupted ceiling lines that highlight the natural grain and character of the wood.
Accommodates natural wood movement
Wood naturally expands and contracts with seasonal humidity changes. Hidden fastening systems allow controlled movement while maintaining board alignment and reducing the risk of splitting or surface damage.
Faster installation
Pre-engineered aluminum rails and clips simplify board alignment and spacing, allowing installers to complete projects more efficiently while maintaining consistent results.
Easy board replacement
Individual boards can be removed and replaced without dismantling the entire soffit, simplifying future maintenance or repairs.
Durable, corrosion-resistant support
The Grad aluminum rail system will not rust or decay, providing a stable substructure for long-lasting wood soffit installations.
Compatible rails: Mini Rails and Star Rails
Mini Rails
Star Rails
Why Use Aluminum Rails Instead of Traditional Wood Battens?
Designed Around Ventilated Façade Principles
A More Stable Alternative to Traditional Furring
Traditional wood battens can introduce movement into the façade assembly due to:
- Moisture absorption
- Shrinkage
- Warping
- Rot potential
The Grad aluminum rail system provides:
- Dimensional stability
- Corrosion resistance
- Precise board alignment
- Long-term performance
Applications
- facades
- wall paneling
- interior applications
- renovate facades
- revamp walls
- facades
- wall paneling
- interior applications
Compatible materials
- Abodo radiata pine
- Accoya Natural
- Accoya Grey
- Arbor Wood Thermoash
- Arbor Wood Thermopine
- dasso XTR bamboo
- Kebony Clear
- Moso Thermo bamboo
- Moso Thermo ndurance
- Thermory Benchmark Ash
- Thermory Benchmark Pine
- Composite
- Ipe
- Garapa