Thermawood Grey Primed Dorset
Clear Glazed
The Thermawood Grey Primed Dorset External Door is a high-performance, thermally rated external door that combines classic styling with advanced insulated construction. Featuring a traditional six-light glazed top panel over two raised lower panels, the Dorset offers timeless kerb appeal while meeting modern energy efficiency standards.
Supplied grey primed (RAL 7038) as standard, this external door is ready for final topcoat finishing to match your property’s exterior.
Excellent Thermal Efficiency
Designed as part of our External Thermal Rated range, the Dorset delivers impressive energy performance with U-values of approximately 1.32 – 1.36 W/m²K, helping to reduce heat loss and improve overall building efficiency.
Its multi-layer engineered construction includes:
XPS foam insulated core
Structural LVL core with Meranti lipping
Integrated 0.2mm aluminium sheet reinforcement for added strength
3.6mm plywood outer layers
45mm overall door thickness
This innovative build provides greater strength and stability compared to traditional timber stile and rail doors.
High-Performance Glazing
The Dorset features a classic six-pane glazed design that allows natural light to brighten your entrance hallway while maintaining strong thermal performance.
Glazing specification includes:
Clear glazed Toughened safety glass
Low-E coating with Argon gas filling for enhanced insulation
Installed using glazing tape and sealant system for long-term durability
This ensures the door performs efficiently even in exposed external conditions.
Built for Strength & Durability
Thanks to its reinforced aluminium layer and insulated core, the Thermawood Dorset is:
Highly resistant to warping and movement
Stronger than traditional external timber doors
Suitable for exposed installations without the need for a porch or canopy in many cases
The substantial 140mm frame width profile enhances structural integrity and visual presence
Flexible Installation – Trim Up to 25mm
The Thermawood Dorset can be trimmed by up to 25mm on all edges, making it ideal for:
Replacement projects
Renovations with non-standard openings
New-build installations requiring adjustment
This generous trimming allowance gives installers greater flexibility on site.
Key Features
Thermally rated external glazed door
Strong U-values (approx. 1.32 – 1.36 W/m²K)
45mm insulated multi-layer construction
Reinforced aluminium sheet core
Six-light clear glazed design
Low-E & Argon gas glazing
Grey primed (RAL 7038) ready for finishing
Trim allowance up to 25mm on all sides
10-year manufacturer’s guarantee
