How to improve energy efficiency with uPVC and aluminium windows
- 17 September, 2025|
- News
Key findings
- Modern uPVC and aluminium windows can achieve A-rated energy efficiency, dramatically reducing heat loss and cutting energy bills by up to 25%
- Advanced features like thermal breaks, multi-chambered profiles and double or triple glazing create superior insulation compared to traditional single-glazed windows
- uPVC windows typically offer slightly better thermal performance with U-values as low as 0.7 W/m²K, whilst aluminium windows achieve excellent thermal efficiency with A-ratings
- Aluminium frames last longer (25+ years) with minimal maintenance, whilst uPVC windows offer outstanding value with lifespans of 15-20 years
- Both materials provide significant energy savings in the long run, with aluminium being the stronger choice for extreme weather conditions and coastal areas
Rising energy costs are pushing homeowners to seek smarter solutions for reducing their bills.
If you’re tired of watching warm air escape through outdated windows whilst your heating works overtime, upgrading to modern energy efficient windows could be your answer.
Today’s uPVC and aluminium windows incorporate cutting-edge thermal break technology and superior insulation properties that can transform your home’s energy performance. Let’s explore how these materials can help you achieve better energy efficiency and long-term savings.
Aluminium windows are an excellent choice for a modern aesthetic
Why energy efficiency matters for modern homes
Energy efficiency isn’t just about reducing bills – though that’s certainly a compelling reason. Improving your home’s thermal performance creates indoor comfort year-round, reduces your carbon footprint and adds value to your property.
Traditional single glazing and outdated window frames are major culprits for energy loss. Heat transfer occurs when warm air escapes through gaps, poor seals and inadequately insulated frames. This forces your heating system to work harder, consuming more energy and increasing costs.
Modern energy efficient windows address these issues through advanced design and materials. They create a thermal barrier that prevents heat loss in winter and heat gain in summer, maintaining comfortable temperatures with minimal energy consumption.
How uPVC windows deliver exceptional energy efficiency
UPVC (unplasticized polyvinyl chloride) frames are designed specifically for superior thermal performance. Their multi-chambered construction creates pockets of trapped air that act as natural insulators, significantly reducing heat transfer.
Multi-chambered profiles for better insulation
The secret to uPVC’s excellent thermal performance lies in its internal structure. Multi-chambered profiles contain several air-filled cavities that create barriers against heat loss. This design prevents cold spots and draughts, maintaining consistent indoor temperatures.
Advanced glazing options
Modern uPVC windows support various glazing configurations. Double glazing provides substantial improvement over single panes, whilst triple glazing offers maximum thermal efficiency. The air or gas-filled space between glass panes creates additional insulation layers.
Minimal maintenance, maximum performance
uPVC frames require virtually no maintenance whilst delivering consistent energy savings. Their weather-resistant properties ensure long-term thermal efficiency without degradation from extreme weather conditions.
Sliding windows are brilliant for increasing ventilation
Aluminium windows: strength meets thermal excellence
Modern aluminium windows have overcome historical thermal limitations through innovative thermal break technology. Today’s aluminium frames deliver impressive energy efficiency alongside unmatched durability and aesthetic appeal.
Thermal break technology transforms performance
Polyamide thermal breaks create a barrier between the internal and external aluminium sections. This prevents heat transfer through the frame, allowing aluminium windows to achieve A-rated energy efficiency. The thermal break acts like insulation within the frame structure.
Superior glazing capacity
Aluminium’s structural strength supports larger panes of glass and various glazing options. Double and triple glazing configurations maximise thermal performance whilst flooding interiors with natural light. Thicker glazing units (up to 44mm) provide excellent insulation and external noise reduction.
Contemporary designs for modern homes
Aluminium frames offer slim profiles and clean lines that suit contemporary architectural styles. Despite their sleek appearance, they deliver excellent thermal performance comparable to bulkier alternatives.
Black heritage windows
Which window material should I choose?
The right choice depends on your priorities, budget and design preferences. Both materials offer excellent energy efficiency, but each has distinct advantages.
Benefits of uPVC windows
Outstanding thermal performance
UPVC windows achieve the lowest U-values, with some systems reaching 0.7 W/m²K. This superior thermal efficiency translates to maximum energy savings and reduced heating costs.
Excellent value for money
UPVC is usually cheaper upfront whilst delivering impressive energy efficiency. The material’s inherent insulating properties don’t require additional thermal breaks, keeping costs manageable.
Low maintenance requirements
UPVC frames never need painting or sealing. They resist weathering, won’t warp or rot, and maintain their appearance with occasional cleaning.
uPVC can be finished to replicate the appearance of timber.
Benefits of aluminium windows
Exceptional durability and longevity
Aluminium windows last 25+ years with minimal maintenance, making them excellent long-term investments. They resist extreme weather conditions and maintain structural integrity in coastal areas where salt air affects other materials.
Superior strength and design flexibility
The strength of aluminium supports larger window openings and slimmer frames. This creates more natural light whilst maintaining structural integrity and thermal performance.
Aesthetic appeal and customisation
Over 200 RAL colour options, including metallic and wood grain effects, provide unlimited design possibilities. Dual colour frames allow different internal and external finishes.
Whilst uPVC typically offers slightly better thermal efficiency, aluminium remains a strong contender with A-rated performance. Aluminium’s longer lifespan (25+ years vs 15-20 years for uPVC) and superior strength make it popular for homeowners prioritising durability and a modern look.
uPVC windows from Warwick Development
Our comprehensive uPVC range delivers outstanding energy efficiency across various styles and configurations, all BBA accredited as standard.
Eurocell casement windows
These A-rated windows achieve U-values as low as 0.8 W/m²K using multi-chambered profiles. Available in 30 colours including realistic woodgrain effects, they suit all property types. High security multi-point locking systems provide peace of mind alongside energy efficiency.
Logik flush windows
Combining traditional aesthetics with modern performance, these windows achieve A-rating with U-values from 0.9 W/m²K. The flush design suits period properties whilst delivering contemporary thermal performance. Available in 19 standard colours plus 32 additional options.
Modus windows
Our most thermally efficient option achieves U-values as low as 0.7 W/m²K. The comprehensive range includes slim rebate, flush sash, reversible and tilt & turn configurations. Made from 50% post-consumer recycled materials, they’re an environmentally conscious choice.
Aluminium windows from Warwick Development
Our aluminium window collection combines thermal break technology with exceptional durability and design flexibility, manufactured in-house using high-tech machinery.
Alitherm window systems
Five distinct systems cater to different requirements. The Alitherm 800 high-performance system achieves A-ratings through advanced thermal breaks. Heritage options replicate traditional steel windows whilst meeting modern energy standards. All systems feature polyamide thermal break technology for excellent thermal performance.
Heritage windows
Specially designed for period properties and listed buildings, these windows achieve B-ratings whilst maintaining authentic steel-look aesthetics. Frame depths of 47mm and 70mm accommodate various glazing configurations up to triple glazing.
Flush windows
The Alitherm 400 system delivers natural U-values as low as 1.4 W/m²K with flush external appearance. These windows achieve A+ ratings in the BRE Green Guide, demonstrating excellent environmental credentials alongside thermal efficiency.
Frequently asked questions
How much can energy efficient windows reduce my heating bills? Modern A-rated windows can reduce energy costs by up to 25% compared to single glazing. The exact savings depend on your home’s size, existing windows and heating system efficiency.
Do aluminium windows get cold in winter? Modern aluminium windows with thermal breaks don’t suffer from cold frames. The polyamide thermal break prevents heat transfer, keeping internal frames warm and preventing condensation.
Which glazing option provides the best energy efficiency? Triple glazing offers maximum thermal performance, but double glazing provides excellent efficiency at lower cost. Your installer can recommend the best choice based on your home’s requirements and budget.
Who are Warwick Development?
Warwick Development are Sheffield-based manufacturers, suppliers and installers of uPVC and aluminium glazing products. As a well-established, family-run business with over 30 years of trading experience, we serve customers across the United Kingdom from our Sheffield headquarters.
We specialise in providing top-quality products to the building trade, retail and DIY sectors at genuine prices. Our comprehensive product range includes energy efficient windows, doors and roofing systems, all manufactured using Eurocell, Spectus and Smart Architectural aluminium profiles.
All our products and installations are accredited by recognised industry organisations, including FENSA, CMS Quality Mark, UKAS, PAS 24, BSI and CMS Bronze, Silver & Gold. We offer free nationwide delivery to trade glazing customers and provide full design and installation services within a 45-mile radius of Sheffield for homeowners.
Our aluminium manufacturing facility uses high-tech machinery to create bespoke glazing products. Trade quotes are provided within 8 working hours, retail quotes within 48 hours, and homeowner installations typically begin within 4 weeks. Our showroom is open Monday to Friday for customers to view our products firsthand.
Ready to improve your home’s energy efficiency with modern uPVC or aluminium windows? Contact Warwick Development on 0114 257 1200 for a free, no-obligation quote. Our experienced team will help you choose the perfect windows to reduce your energy bills and create a more comfortable home.
