Thermawood Grey Primed Devon
Obscure Glazed
The Thermawood Grey Primed Devon External Door is a high-performance, thermally rated external door that combines traditional character styling with advanced insulated construction. Featuring an elegant arched panel design with a central obscure glazed unit, the Devon is ideal for front entrances where natural light and privacy are equally important.
Supplied grey primed (RAL 7038) as standard, this door is ready for final topcoat finishing to suit your exterior colour scheme.
Excellent Thermal Efficiency
The Thermawood Devon is engineered to deliver impressive energy performance, achieving strong U-values of approximately 1.32 – 1.36 W/m²K, helping reduce heat loss and improve overall building efficiency.
Its advanced multi-layer construction includes:
XPS foam insulated core
Structural LVL core with Meranti lipping
Reinforced 0.2mm aluminium sheet layer within the door construction
3.6mm plywood outer layers
45mm overall door thickness
This unique build makes the Devon significantly more stable and weather-resistant than traditional timber stile and rail external doors.
Obscure Glazing with Enhanced Performance
The Devon features a centrally positioned glazed panel that allows natural daylight into your hallway while maintaining privacy. The glazing specification includes:
frosted / obscure glazing
Toughened safety glass
Low-E coating with Argon gas filling for improved thermal performance
Installed using glazing sealant and tape system for durability
This ensures both insulation efficiency and long-term reliability in exposed conditions.
Built to Withstand the Elements
Thanks to its reinforced aluminium layer and insulated core, the Thermawood Devon is designed for exposed external installations. Key benefits include:
Enhanced resistance to movement and warping
Increased structural strength compared to standard timber doors
Suitable for installations without the need for a porch or canopy in many cases
Generous Trimming Allowance
Like the rest of the Thermawood range, the Devon offers exceptional installation flexibility. The door can be trimmed by up to 25mm on all edges, making it perfect for:
Renovation and replacement projects
Older properties with non-standard openings
New-build installations requiring adjustment
This generous trimming allowance is a major advantage for installers.
Contemporary Traditional Design
The Devon design blends vertical groove detailing with a soft arched top panel layout, creating a welcoming entrance aesthetic that suits both modern and traditional homes. The subtle U-groove detailing enhances depth while maintaining a clean finish
Finished in Grey Primer (RAL 7038) as standard, it provides a smooth base for final decoration
