Casement Window Supply & Installation Across London

The Classic Look — Reimagined with Premium Brands

We supply and install premium casement windows from top European brands such as Drutex, Reynaers, and Schüco — offering you the traditional look of side-hinged windows, with the advanced performance and longevity of today’s best materials and engineering.

Leading European Brands

Choose uPVC casement windows from Drutex for an affordable and highly insulated solution, aluminium casement windows from Reynaers for architectural elegance and structural strength, or precision-engineered aluminium systems from Schüco for cutting-edge security, thermal performance, and automation compatibility.

With a wide choice of frame colours, furniture finishes, glazing options, and opening styles, our casement windows are designed to complement any home — from traditional to ultra-modern.

Customisation Options

We offer an extensive range of Customisation possibilities to ensure your casement windows perfectly match your aesthetic and functional requirements. From frame materials to security features, every detail can be tailored.

Frame Materials: uPVC, Aluminium, Timber
Colours & Finishes: Wide choice of RAL powder coated, foiled colours, and dual-colour options
Glazing: Double and triple glazing with low-e coatings, warm edge spacers, argon fill
Hardware: Contemporary handles, heritage-style options, child restrictors, friction hinges

What Is a Casement Window?

A casement window is side-hinged and opens outward or inward like a door. It’s a timeless choice, offering full ventilation and easy operation, often used on its own or paired with fixed or top-hung panes.

How They Operate

Casement windows open via hinges mounted on the side of the sash. They are operated using a handle or crank and open outward (most common in the UK) or inward, depending on the system. High-quality models from Drutex, Reynaers, and Schüco feature multi-point locking, friction hinges, and optional restrictors.

Key Advantages

Excellent Ventilation – Full sash opening to let in fresh air
Outstanding Thermal Efficiency – Suitable for double or triple glazing
Slim, Unobstructed Views – Especially with aluminium frames
High Security – Reinforced locking systems and internal glazing
Flexible Configurations – Available as single sash, French-style, or combined with fixed panes

⚠️ Potential Disadvantages

Outward-opening sashes may obstruct paths or exterior shutters
Need limiters or stays to prevent damage in windy areas
Not always suitable above walkways or public footpaths

Design Options & Materials

Feature	Details
Materials	uPVC (Drutex), Aluminium (Reynaers, Schüco)
Openings	Single sash, double sash (French casement), fixed + opening combinations
Finishes	RAL powder coated (Reynaers, Schüco), foiled colours (Drutex), dual-colour options
Furniture	Contemporary handles, heritage-style options, child restrictors, friction hinges

Is This Window Right for You?

Drutex

IGLO EXT – Ideal for family homes. Offers reliable performance, secure locking, and a variety of finishes. Great for improving energy efficiency in older properties.

Reynaers

Slimline 38 – Perfect for contemporary extensions. Slim sightlines, triple glazing, and clean architectural detailing.
CS 77 Functional / Renaissance – Matches traditional properties while meeting modern performance standards.

Schüco

AWS 75.SI+ – Engineered for precision builds. Ultra-low U-values, concealed hinges, and smart home readiness.

Internorm

HF510 – Timber-Aluminium with I-tec Core and triple gasket system
HF410 – Hybrid frame, modern slimline look, exceptional insulation
KF410 – uPVC-Aluminium, Passive House certified with integrated technologies

Installed by Experts — Not Just Sold

Every window is only as good as its installation. That’s why AT-ECO uses FENSA-certified installers with years of experience working on both traditional and contemporary homes.

We personally survey, configure, and fit every system to manufacturer specifications, ensuring long-term performance and compliance with UK Building Regulations (Part L, Q, and F where applicable).

Technical Specification Comparison

Feature	Drutex IGLO EXT / MB-86	Reynaers CS 77 / MasterLine 8	Schüco AWS 75.SI+ / AWS 90.SI+
Material	uPVC	Aluminium	Aluminium
Uw-value (up to)	0.76-0.89 W/m²K	0.88-0.95 W/m²K	0.88-0.92 W/m²K
Security	Maco multi-point lock / PAS 24	PAS 24 / Secured by Design	PAS 24 / RC2 / RC3 rated
Glazing Options	Double / Triple	Double / Triple	Triple glazing (standard)
Automation Support	No	Optional	Schüco TipTronic available
Max Sash Size	~1200 x 1500 mm	~1400 x 1600 mm	~1500 x 2000 mm
Style Variants	Classic	Functional / Deco / Renaissance	Slimline / Concealed hinge

Casement vs Tilt-and-Turn — What’s the Difference?

Feature	Casement Windows	Tilt-and-Turn Windows
Opening Direction	Side-hinged, outward (UK standard)	Tilts inward at top, turns inward
Ventilation Control	Excellent for airflow	Dual-mode, ideal for controlled vent
Ease of Cleaning	Easier for ground floors	Better for upper levels
Appearance	More traditional	Modern / continental feel
Hardware Cost	Lower	Higher (dual-function hardware)

Casement windows are ideal if you want simplicity, lower cost, and great airflow.
Tilt-and-turns suit properties where inward access and ultra-modern design are key.

Frequently Asked Questions

Are casement windows secure?

Yes — especially those we supply. All systems feature multi-point locking and can be upgraded with laminated glass or restrictor stays.

Do these windows meet building regulations?

Absolutely. Our casement windows comply with UK Part L for thermal efficiency, Part Q for security (new dwellings), and Part F where trickle vents are required.

Are casement windows suitable for listed buildings?

In most cases, no — but Reynaers Renaissance profiles or timber-aluminium options may be accepted in conservation areas. Always check with your local authority.

Can I choose flush casement designs?

Yes, several of our systems offer flush frame casement options, especially in aluminium.

What glazing options are available?

All models support double or triple glazing, with low-e coatings, warm edge spacers, and argon fill for superior energy ratings.

Performance That Stands Up to Scrutiny

Unlike low-end options, our casement windows offer performance backed by independent testing:

Triple glazed units with Uw-values up to 0.8 W/m²K
PAS 24 / RC2 certification for burglary resistance
Acoustic insulation up to 45 dB with appropriate glazing
Wind resistance Class C5 (up to 2000 Pa) on select models

These aren't just promises — they're lab-certified specs, trusted in homes across Europe.

🌍 A Better Window for You and the Planet

Aluminium frames from Reynaers and Schüco are 100% recyclable, with optional low-carbon sourcing
Drutex uPVC frames meet REACH compliance and include post-consumer recycled content
Where applicable, timber components are FSC-certified for responsible sourcing

Plus, by improving insulation and lowering heat loss, high-quality casement windows help reduce household carbon emissions 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.