Thermal Performance

thermally efficient windows and doors

Our aluminium windows and doors are built with thermal breaks and modern technology. This reduces heat transfer and makes them an excellent upgrade for your home. Learn exactly what U-values mean and how thermally efficient aluminium double glazing can save you money in the long run.

what is a u-value?

You may have heard the term U-value before. Simply put, this measures how well a building component measures heat transfer. The lower the U-value, the slower or more difficult it is for heat to pass through the window or door. All elements of the window or door can be assessed, including the glass, frame, panel and more.

U-values are measured in W/m2K. We work alongside reputable manufacturers who provide certifiable U-values you can trust. Our aluminium windows and doors are designed to meet and exceed modern building regulations.

HERITAGE COLLECTION

SINGLE DOORS

We can customise the size, style, and features of your single door to suit your design needs.

ARCHITECTURAL COLLECTION

FRENCH DOORS

French doors feature large areas of glazing to maximise natural light.

ARCHITECTURAL COLLECTION

BIFOLD DOORS

Bifold doors fold like an accordion when opened, which provides greater access to the outdoors and stunning views.

ARCHITECTURAL COLLECTION

SLIDING DOORS

Our sliding doors can open up an entire wall with beautiful views and create a flow between indoor and outdoor areas.

HERITAGE COLLECTION

FRENCH DOORS

French doors feature large areas of glazing to maximise natural light.

ARCHITECTURAL COLLECTION

SINGLE DOORS

We can customise the size, style, and features of your single door to suit your design needs.

HERITAGE COLLECTION

INTERNAL DOORS & SCREENS

Internal screen doors open in or open out for easy access from room to room. They create flexible room layouts without taking up needed floor space.

HERITAGE COLLECTION

SINGLE DOORS

Our heritage entrance doors are slim and period styled with a lockbox design.

ARCHITECTURAL COLLECTION

FIXED WINDOWS

Easy to maintain, fixed aluminium windows have no moving parts. Explore our Architectural fixed window range today.

HERITAGE COLLECTION

FIXED WINDOWS

Easy to maintain, fixed aluminium windows have no moving parts. Explore our Heritage fixed window range today.

ARCHITECTURAL COLLECTION

FRENCH WINDOWS

Modern Architectural Aluminium French casement windows let in plenty of natural light with slim, elegant sightlines.

HERITAGE COLLECTION

FRENCH WINDOWS

Aluminium French casement windows are a traditional design that offers a timeless, elegant aesthetic

ARCHITECTURAL COLLECTION

CASEMENT WINDOWS

Our Architectural casement windows are highly thermally efficient and feature sleek seamless frames

HERITAGE COLLECTION

CASEMENT WINDOWS

Our Heritage casement windows are the slimmest in our range.

REQUEST A QUOTE

InsuLock technology

Inside every Endurance product is an innovative multi-chamber thermal core. Our systems have been tested for performance, achieving brilliant U-values to keep your home warm through the winter.

THERMAL BENEFITS OF ALUMINIUM

THERMAL BENEFITS OF ALUMINIUM
THERMAL BREAK TECHNOLOGY

Thermal breaks prevent heat from flowing through the material and help provide a lower U-value and improved energy efficiency.

DOUBLE, OR TRIPLE GLAZED UNITS

Double or triple glazing will improve aluminium’s thermal benefits. In addition, quality glazing offers soundproofing and security benefits that are well worth the upgrade.

THERMAL STABILITY

With thermal breaks and a multi-chamber core, our aluminium is much more thermally stable than other competitor products.

REDUCED HEAT TRANSFER

Our aluminium windows and doors’ multi-chamber cores reduce heat transfer in the winter but keep you cool and comfortable in the summer.

aluminium
VS PVC

With modern technology, the thermal benefits of aluminium are comparable with uPVC- traditionally a better insulator. Aluminium is also stronger, more durable, and an ideal choice for modern homes. Compare the difference in aesthetics below.

BENEFITS OF A THERMALLY EFFICIENT HOME

A thermally enhanced aluminium window or door designed to reduce heat transfer means you won’t need to worry about turning up the heating during the colder months.

Reduced energy bills

Reduced carbon footprint

Increased home comfort

Reduced condensation build up

Want to know more?

Doesn’t aluminium lose heat quickly?

Aluminium is a highly conductive metal; however, with modern thermal break technology and our quality systems, you won’t notice a difference between this and any other material.

How long does aluminium last?

Aluminium windows and doors can last up to 30-40 years, making them a cost-effective solution in the long run over less durable materials like uPVC.

Do aluminium windows get condensation?

Quality double and triple glazing is best to avoid condensation buildup in any window. Contact us to discuss options for your home.

© 2025 Endurance Aluminium