Winter in Surrey brings with it crisp mornings, early sunsets, and that familiar temptation to turn the heating up just a little higher. But as energy prices remain unpredictable, many homeowners are looking for smarter, more sustainable ways to keep their homes warm without sending their bills soaring.
The truth is, much of the heat you pay for could be escaping right through your windows and doors. Studies show that energy efficient windows alone can save £140 on energy bills. That makes upgrading to energy efficient windows one of the most effective ways to stay cosy this winter, and save money long term.
Your windows and doors are the unsung heroes of your home’s insulation. Even small gaps or ageing seals can let precious heat escape, making your boiler work harder and your living spaces less comfortable. Older or poorly fitted glazing can waste up to 30% of your heating energy, which is like throwing a portion of your energy bill straight out the window.
Investing in A-rated double glazing or even triple glazing means your home retains heat better, stays quieter, and feels consistently warm throughout the day. Properly fitted doors also play a crucial role - a single draft can undo the benefits of high-quality glazing.
Outdated glazing doesn’t just make rooms chilly; it drains your finances. Many homes across Farnham, Guildford, and Woking still have original single glazing or early UPVC windows and doors that no longer meet modern energy standards. Research by the UK Government shows that upgrading to A-rated double glazing could save homeowners between £80 and £155 per year, depending on property type.
Over time, those savings add up, especially when combined with a warmer, more comfortable home environment. For larger properties or detached homes, the potential savings and comfort improvements are even greater.
When we talk about energy efficient windows, we’re referring to materials and glazing technologies that minimise heat transfer. The lower the U-value, the better the insulation. Options like aluminium double glazing, timber double-glazed windows, and composite frames now feature advanced manufacturing techniques, including thermally broken frames and low-emissivity coatings.
These innovations prevent cold bridging and keep warmth inside where it belongs. Combining these with an airtight installation ensures that every investment you make in heating your home is fully maximised.

Every home is different, and so is every homeowner’s priority. Some value heritage aesthetics; others prefer modern minimalism or low-maintenance convenience. At Chartwell Classic Windows, we supply and install aluminium, timber, UPVC, and composite windows across Surrey and Hampshire, helping homeowners balance style, comfort, and budget.
Once considered a cold material, modern aluminium windows have come a long way. Today’s slimline aluminium windows offer exceptional thermal performance thanks to thermally broken profiles. They’re sleek, durable, and perfect for contemporary extensions or garden rooms in places like Farnham and Woking. Aluminium double glazing also allows for larger panes, letting in more natural light without compromising insulation.
For homeowners comparing aluminium windows vs UPVC, aluminium offers greater design flexibility, strength, and longevity - ideal for those looking to make a lasting investment. New finishes and powder coatings also ensure a long-lasting, low-maintenance surface.
For character properties and period homes, nothing compares to timber windows. They bring natural warmth and authenticity that synthetic materials can’t replicate. Advances in timber treatments mean modern hardwood window frames and triple-glazed timber windows are just as durable as their aluminium counterparts, while offering superior insulation and environmental sustainability.
Across Guildford, Godalming, and surrounding villages, timber windows UK remain a top choice for homeowners looking to preserve charm while improving energy performance. Proper maintenance extends lifespan significantly, making timber a solid, long-term investment.
For those who want practicality and affordability, UPVC windows and doors remain an excellent option. They’re low-maintenance, secure, and available in a variety of finishes to suit any home. Composite windows UK combine the best of both worlds: the strength of aluminium or timber with the insulating core of UPVC. They’re durable, thermally efficient, and great value for money.
If you’re looking for a straightforward way to cut heat loss and modernise your home, these are the ideal choice. Their multi-chamber frames and weather seals make them a smart winter investment.
While you’re speaking to us about investing in energy efficient windows, here are practical steps you can take to keep the heat in and the cold out.
Before anything else, inspect your existing windows and doors for draughts. Over time, rubber seals and gaskets can deteriorate, creating gaps where heat escapes. Resealing or repairing these can provide a noticeable difference in comfort at minimal cost. For older homes, even simple measures such as thermal curtains or draught excluders can provide an immediate improvement.
Replacing old glass with A-rated double glazing can dramatically reduce heat loss. In fact, upgrading from outdated windows can cut heat loss from around 44% to 22% or better. Pairing new glazing with insulated frames ensures maximum performance. Consider triple-glazed timber windows or aluminium double glazing if your property is exposed to high winds or open areas; both offer excellent thermal retention.
Don’t forget that doors are part of the same thermal envelope. Replacing older front or back doors with modern composite external doors or UPVC front doors helps prevent draughts and heat loss. Stylish options such as French doors or bifold doors can also be designed with efficient glazing, keeping you warm without sacrificing light or style. At Chartwell Classic Windows, we help you find complementary styles that enhance your home’s appearance as well as its efficiency.

Replacing windows and doors might seem like a big investment, but the returns go far beyond energy savings.
With energy prices fluctuating, reducing heat loss can significantly lower bills year after year. A warmer home also means less strain on your boiler and a smaller carbon footprint. For many, these improvements can even enhance property value and comfort. Homebuyers increasingly look for energy efficient windows and modern composite doors, making upgrades a smart investment.
At Chartwell Classic Windows, we offer transparent, competitive pricing and tailor each project to your home’s needs and style. Planning your installation over winter helps secure preferred dates for spring and summer, ensuring your home is ready for next winter’s chill. We also provide free, no-obligation surveys so you can plan ahead with confidence.
A window is only as efficient as the person who installs it. Poor fitting leads to air leaks, condensation, and underperformance. As a family-run business based in Farnham, we take pride in craftsmanship, reliability, and personal service. With over a decade of experience installing aluminium, timber, UPVC, and composite windows across Surrey and Hampshire, we’ve built our reputation on quality work at fair prices. Choosing local means direct accountability, faster aftercare, and installations tailored to local building styles.
When it comes to improving your home’s warmth, comfort, and style, Chartwell Classic Windows makes the process simple and stress-free. We supply and fit premium energy efficient windows and doors in a range of materials, offering expert advice tailored to your home’s age, look, and budget.
Get in touch today to request a free quote or book a consultation. Our friendly team covers Farnham, Guildford, Camberley, Woking, and the surrounding areas. Let’s make your home warmer, more beautiful, and more efficient this winter.