Sleek Design. Advanced Security. Thermal Performance.

At AT-ECO Windows & Doors, we supply premium flush entrance systems from Internorm, Drutex, Reynaers, and Schüco — each offering cutting-edge design, tested performance, and complete peace of mind.

What Are External Flush Doors?

External flush doors are sleek, modern entrance doors where the door panel sits perfectly level with the surrounding frame. Unlike traditional panelled or raised designs, flush doors create a flat, minimalist look — both inside and out. They’re built not only for style, but also for weather resistance, security, and exceptional thermal insulation.

Benefits of Flush Door Design

Flush entrance doors are designed for architectural clarity and performance. Their flat-panel construction blends perfectly with contemporary façades and aligns well with render, glass, or cladding finishes.

They’re especially popular in new builds, low-energy homes, and renovations that prioritise both efficiency and style.

Key Features

Minimalist Appearance: Door and frame are perfectly aligned for a seamless exterior finish.
High Insulation Values: Triple seals and insulated cores deliver excellent thermal and acoustic protection.
Enhanced Security: Multi-point locking, concealed hinges, PAS 24/SBD and RC2/RC3 resistance classes.
Durability and Weather Resistance: Engineered to perform in varied UK climates with minimal maintenance.
Premium Material Options: Choose from aluminium, timber-aluminium, or uPVC-aluminium combinations.

Why Choose a Flush Entrance Door?

Clean, architectural design for modern homes
Compatible with Passive House and Enerphit standards
Hidden hardware options for a discreet finish
Smart lock and fingerprint entry compatibility
Long lifespan with minimal upkeep
Available in a wide range of finishes and colours

U-Value Performance Comparison

Brand	Material	U-Value (W/m²K)	Security Class	Passive House Certified
Internorm	Timber-Aluminium	up to 0.55	RC2	✅ Yes
Drutex	Aluminium	~0.83	PAS 24	❌
Reynaers	Aluminium	From 0.98	PAS 24/RC2/RC3	❌
Schüco	Aluminium	From 1.1	PAS 24/RC2/RC3	❌

Flush Door Model Comparison

Brand	Model	Material	U-Value (W/m²K)	Security Rating	Passive House Suitable	Notable Features
Internorm	AT 540	Aluminium	~0.78–0.84	PAS 24/SBD/RC2	✅ Yes (option dependent)	Modern flush design, thermal foam insulation, customisable
Internorm	HT 410	Timber-Aluminium	~ 0.58-0.80	RC2	✅ Yes	Passive House ready, deep sash design, concealed hardware
Drutex	D-ART Line	Aluminium	~0.83	RC2	✅ Yes	Decorative flush panel design, highly customisable finishes
Drutex	MB-86 SI	Aluminium	~0.83	PAS/RC2	✅ (select setups)	High insulation system, multi-chamber, thermal breaks
Drutex	MB-78EI	Aluminium (Fire-Rated)	~1.6	FD30 / FD60	❌	Fire-resistant flush door, internal/external use
Reynaers	ML8	Aluminium	~0.98	PAS 24/RC2	❌	Slim flush frame, modern look, good basic insulation
Reynaers	ML10	Aluminium	~0.81	PAS 24/RC2	✅ (select configs)	Higher insulation upgrade, concealed hinges optional
Schüco	AD UP 75	Aluminium	~ 1.1	PAS 24/RC2/RC3	❌	Thermally broken system, optional smart locks, ultra-flat profile

Smart Technology Integration

Modern flush doors go beyond aesthetics. Our top-end models offer optional smart features such as:

Keyless entry systems
Remote control via smartphone app
Fingerprint recognition
Soft-close and auto-lock technology

These options are especially popular with Internorm and Schüco systems and ideal for high-specification homes.

Suitable Applications

High-spec new build homes
Passive House and Enerphit-certified homes
Renovation projects with contemporary façades
Design-conscious homeowners and developers
Luxury residential or architectural projects

Warranty and Technical Support

Product warranties vary by brand and configuration. We offer full guidance on:

Manufacturer guarantees
Maintenance requirements
Expected service life
Certification and compliance documentation

Looking for certified Passive House doors? We offer a selection with market-leading insulation performance and airtight construction.

Sustainability Considerations

Recyclable aluminium and uPVC components
FSC-certified timber cores (Internorm)
Long product lifespans reduce replacement cycles
Improved energy efficiency reduces environmental impact over time

Recent Work

Working closely with architects, builders, and homeowners, we’ve delivered systems that combine thermal efficiency, modern aesthetics, and long-term durability—across private residences, sustainable developments, and architect-led designs.

Swanton House: Modern Renovation in Kent

The renovation project was successfully completed on schedule, surpassing initial insulation and energy efficiency goals by an impressive 70% and delivering a sleek, contemporary finish.

External Flush Doors