Energy-efficient Timber Doors & Windows UK: A Guide

• 26 February 2025|
• News

The demand for energy-efficient building components continues to grow across the UK’s construction industry, driven by increasing concerns over environmental responsibility and climate change.

At Lomax + Wood, we’ve established ourselves as specialists in crafting made-to-order timber windows and doors that expertly balance thermal efficiency with beauty, strength and style. Our doors & windows not only meet but exceed UK building regulations for thermal performance, offering sustainable, efficient solutions for both contemporary developments and period properties.

Timber as a natural insulator

Bespoke timber windows and doors remain a sought-after solution, offering beauty and longevity. Yet timber also offers benefits beyond aesthetics.

For those looking for energy-efficient solutions, timber is an excellent choice. As a natural insulator, wood provides inherent energy-efficient qualities that we’ve refined through decades of manufacturing expertise.

Our windows and doors are designed to reduce and minimise heat loss, maintain comfortable indoor temperatures and reducing energy costs – a crucial consideration for architects and developers working on high-end residential projects.

At Lomax + Wood, we offer a selection of wooden windows and doors crafted with thermal performance in mind.

Made-to-order timber windows: balancing performance and style

At Lomax + Wood, we’re passionate about crafting windows that perfectly balance beautiful aesthetics with modern performance.

We create made-to-order timber flush casement and a range of beautiful sash windows, all of which are crafted using both traditional methods and contemporary CNC machinery.

This approach allows us to ensure consistent quality and maintain the authentic character of our windows, while also incorporating the latest advancements in thermal technology.

Our windows are designed to offer the very best in performance, and we offer a range of optional upgrades for those looking to prioritise energy efficiency and acoustic insulation. Our flush casement windows achieves an impressive 1.2W/m²K as standard, but we can achieve U-values as low as 1.0 W/m²K with optional upgrades, exceeding building regulation requirements. Our double glazed timber sash windows achieve U-values as low as 1.1W/m²K as standard, with optional upgrades as required.

This superior performance is achieved through careful design of quality timber profiles, high-performance glazing units, and sophisticated weathersealing systems.

Our comprehensive door collection

Our door range encompasses an extensive selection of external wooden doors to meet diverse architectural requirements.

Traditional entrance doors featuring decorative panels provide a striking first impression, while our classic French doors create elegant transitions between indoor and outdoor spaces. For larger openings, our innovative bi-folding door systems can span up to 16 metres, offering unprecedented flexibility. Beautiful and versatile single wooden doors complete our collection, perfectly suited to both modern and heritage developments.

We craft each door type in both hardwood and softwood options, including premium materials such as Engineered Oak, Accoya, and Engineered Redwood. For projects requiring specific specifications, we also offer composite solutions combining timber with aluminium cladding, delivering exceptional durability and minimal maintenance requirements.

Advanced thermal technology

The energy efficiency of our timber doors is achieved through multiple technical innovations.

We capitalise on timber’s natural insulating properties by combining timber door frames with high-performance double glazed units, with optional advanced Low-E glass coatings that can effectively reflect heat back into the interior.

Our range of doors can achieve U-values as low as 1.4 W/m²K, while advanced weatherising systems also provide excellent protection against the elements.

Colours and finishes: customisation options

Our made-to-order timber windows and doors don’t just provide excellent energy efficiency – they can also be customised and tailored to suit virtually any architectural style imaginable.

Understanding that each project demands its own solutions, we offer extensive customisation options. Our timber windows and doors can be finished in any colour from the full RAL range, with dual-colour options available for different internal and external finishes.

Traditional stains can be used to highlight the natural wood grain, while period-appropriate decorative glazing patterns add character.

Our customisation options are extensive, including a comprehensive range of glazing solutions, hardware and ironmongery. From the initial timber selection and precise dimensions to decorative glazing options and a wide range of colour choices, we ensure every element of our windows and doors meets your unique needs.

Sustainability & environmental responsibility

At Lomax + Wood, environmental responsibility is central to our manufacturing philosophy. We source all timber used in our bespoke windows and doors with full Chain of Custody certification (FSC® or PEFC), ensuring complete traceability throughout the entire supply chain, from the forest to the finished product.

Additionally, the thermal efficiency of our windows and doors results in less energy needed to keep properties at comfortable temperatures, and the natural longevity of our timber products minimises replacement needs.

How do energy-efficient timber windows and doors contribute to sustainability in the UK?

Energy-efficient timber windows and doors in the UK contribute to sustainability by providing better insulation, reducing heat loss, and decreasing energy consumption for heating or cooling homes. This helps lower carbon emissions and promotes a more environmentally friendly approach to construction and modern living.

Technical excellence and installation

Professional installation is crucial for maintaining energy efficiency and ensuring all components are working as they should to prevent heat loss, which is why we provide comprehensive technical support throughout the process.

Where needed, our expert fitting teams can provide perfect installation, while detailed technical support helps maintain long-term performance.

Future-proof design

Our timber windows and doors are engineered to meet both current and anticipated energy efficiency standards. They consistently exceed current building regulations. This forward-thinking approach ensures long-term performance sustainability and value for your investment.

For architects, developers, and homeowners seeking to create energy-efficient, sustainable buildings without compromising on style, our timber windows and doors offer the perfect solution. Each product in our range is manufactured to exacting standards, combining traditional craftsmanship with modern technology to deliver exceptional performance.

Energy-efficient timber windows and doors UK: Contact Lomax + Wood

To discuss your specific project requirements or learn more about our energy-efficient timber products, please contact our expert team. We’re ready to help you select the perfect windows and doors for your development, whether you’re working on a period restoration or a contemporary new build.

Call 01277 353857 or use our online contact form to find the perfect solution for your project.