Double & Triple Glazed Windows
We supply and fit a wide range of high quality, double glazed windows, across Hampshire.
Double & Triple Glazed Windows Installation in Hampshire
Quality, Affordable, Double & Triple Glazed Windows
Looking for new windows for your home? We supply and fit a wide range of high quality double glazed windows and triple glazed windows across Hampshire. As a Which? Trusted Trader with Trading Standards approval, you can trust our experienced team for expert double glazing installation backed by our 10-year insurance guarantee. Whether you're replacing old windows or upgrading to energy efficient windows, we're here to help.

Excellent Energy Efficiency

Excellent Security Features
Why Choose Us for Your Window Replacement?
Transform your home with our A rated windows - available in both A rated double glazing and triple glazing specifications. As an established double glazing company, we offer the perfect combination of style, security, and energy efficiency. Every window is tailor-made for your property and designed as energy saving windows that retain heat, reduce noise, and keep your home comfortable all year round.
Our replacement windows feature multi-point locking systems for enhanced security - these secure windows provide peace of mind whilst our low maintenance windows mean no more painting or staining. As a trusted glazing company serving Hampshire, we're committed to quality workmanship on every installation.
uPVC Double Glazed Windows
Our uPVC windows come in a variety of styles, colours and finishes. uPVC double glazing is the UK's most popular choice, offering excellent thermal performance with minimal maintenance. Our robust uPVC window frames are available in classic white, modern anthracite grey, and striking black, plus realistic woodgrain finishes to complement any property.
Aluminium Double Glazed Windows
For a sleek, contemporary look, choose our aluminium windows. Aluminium double glazing features slim frames for maximum natural light and a modern finish - perfect for modern double glazed windows installations. These robust, long-lasting frames can be customised to match your taste and home's architecture.
Glazing Options


We offer a comprehensive range of glazing options to suit every need. All windows come with A rated double glazed windows as standard, with A+ and A++ options for maximum thermal performance. For ultimate energy efficiency, our triple glazing option adds a third pane of glass and extra insulating chamber, significantly reducing heat loss. We also supply replacement double glazed sealed units and sealed units for failed or misted glass - a cost-effective alternative to full window replacement.
Heritage Windows for Period Properties
Our heritage windows are specially designed to replicate the authentic appearance of traditional timber windows whilst providing all the benefits of modern double glazing. Available as uPVC heritage windows or aluminium, our heritage style windows feature period-appropriate details such as decorative glazing bars, run-through sash horns, and woodgrain finishes - ideal for conservation areas and period properties.
Double Glazing Repairs & Installation
Not every problem requires full replacement. Our double glazing repairs service can fix misted units, broken handles, faulty locks, and worn seals - often for a fraction of the replacement cost. When you do need new windows, our experienced window installers and window fitters ensure professional installation with minimal disruption to your daily routine.
Why Choose Us?
At Advanced Exterior Plastics we pride ourselves on providing the best double glazed windows in Hampshire, and only sell products made by leading aluminium and uPVC window manufacturers. With our in-depth local knowledge and a commitment to excellence, we ensure a seamless installation experience from start to finish. Our team of experts is here to guide you through every step, ensuring you find the perfect windows for your home.
Get Your Free, No Obligation Quote
Ready to upgrade your windows? Contact us today to schedule your free consultation. Our friendly team is ready to answer all your questions and help you find the perfect new windows for your home. Call us on 02380 692447 or complete our online enquiry form.
Get in touch today, to arrange your free, no-obligation quote!
Double Glazing FAQs
Both uPVC windows and aluminium windows offer significant benefits over older timber windows. uPVC window frames are renowned for durability, excellent thermal performance, and cost-effectiveness - they require minimal maintenance and are available in a wide range of colours and woodgrain finishes. Aluminium double glazing is known for exceptional strength, slim profiles that maximise natural light, and a contemporary aesthetic. Aluminium windows are highly durable, recyclable, and ideal for larger installations. The choice often comes down to personal preference, property style, and budget.
Double glazed windows work by trapping air or inert gas between two panes of glass, creating an insulating barrier that significantly reduces heat loss. Energy efficient windows mean your home stays warmer in winter without relying heavily on central heating, which can lower your energy bills. All our energy saving windows come with A rated windows as standard - the highest rating in the Window Energy Rating (WER) system. Modern double glazing can reduce heat loss by up to 50% compared to older single glazed or early double glazed units.
A rated windows are double glazed windows that have achieved an 'A' rating under the British Fenestration Rating Council (BFRC) Window Energy Rating scheme. This rating system measures overall energy efficiency by considering thermal insulation (U-value), solar heat gain, and air leakage. A rated double glazing retains more heat and uses less energy than lower-rated alternatives. All our A rated double glazed windows help reduce heating bills and carbon footprint, with A+ and A++ options available for maximum efficiency.
Heritage windows are specially designed replacement windows that replicate the authentic appearance of traditional timber windows whilst providing all the benefits of modern double glazing. Our heritage window range includes uPVC heritage windows and aluminium options, featuring period-appropriate details such as decorative glazing bars, run-through sash horns, and woodgrain finishes. These heritage style windows are ideal for period properties, conservation areas, and homeowners who want to maintain traditional character without sacrificing energy efficiency or security.
Double glazing consists of two panes of glass with an insulating gap between them, whilst triple glazing uses three panes with two insulating gaps. Triple glazed windows offer superior thermal insulation, achieving lower U-values and better energy ratings. They also provide enhanced sound insulation, making them ideal for homes near busy roads or airports. For most Hampshire homes, A-rated double glazing provides excellent energy efficiency at a more affordable price point. Triple glazing is particularly beneficial for north-facing rooms, new build properties, or homes in particularly cold or noisy locations.
Absolutely! We offer a wide range of colours and finishes for both uPVC windows and aluminium windows. From classic white to contemporary anthracite grey and traditional woodgrain effects, we tailor your new windows to suit your style. Our uPVC double glazing is available in various RAL colours and realistic wood finishes, whilst aluminium windows can be powder-coated in virtually any colour. We also offer dual-colour options with different colours inside and outside.
We offer a comprehensive range of window styles. Casement windows are the UK's most popular choice, offering excellent ventilation. Flush casement windows provide a sleek look with sashes sitting flush with the frame. Bay windows and bow windows create additional space and flood rooms with natural light. Tilt and turn windows offer versatile ventilation options, ideal for high-rise apartments. Sliding sash windows replicate Georgian and Victorian elegance with modern efficiency. Our heritage windows are perfect for period properties in conservation areas.
The time for double glazing installation varies depending on the number, size, and style of windows. A single standard window typically takes 2-3 hours to install, whilst a full house installation usually takes 2-3 days. Our experienced window installers work efficiently to minimise disruption, and our window fitters always clean up thoroughly after installation. Following your consultation and survey, we'll provide a clear timeline for your specific project.
We provide a comprehensive 10-year insurance backed guarantee on all products and installation. This covers any defects in materials or workmanship. As a Which? Trusted Trader and Trading Standards approved double glazing company, we stand firmly behind our work. The insurance backing means your guarantee remains valid even in the unlikely event that our glazing company ceases trading - giving you complete peace of mind.
Modern double glazed windows are designed to be low maintenance windows. For uPVC frames, simply wipe with warm soapy water and a soft cloth - avoid abrasive cleaners. Aluminium frames can be cleaned the same way. We recommend checking drainage holes periodically and lubricating hinges and locks annually with light oil. With proper care, your low maintenance windows will maintain appearance and performance for many years without painting or staining.
Sealed units (also called double glazed sealed units or IGUs - Insulated Glass Units) are the glass component of a window, consisting of two or three panes hermetically sealed together. If your sealed units have failed - typically indicated by condensation or misting between panes - they can often be replaced without changing the entire frame. Our double glazing repairs service includes replacement sealed units, restoring thermal efficiency and clear visibility at a fraction of full window replacement cost.
The cost of new windows varies depending on style, size, frame material, glazing specification, and quantity. As every home is different, we provide free, no-obligation quotes tailored to your requirements. We offer a price match guarantee on replacement windows, so if you receive a like-for-like quote from another reputable company, we'll match it. Flexible payment options are available to spread the cost of your new double glazed windows.
Bay windows typically feature three panels set at angles, whilst bow windows have four or more panels creating a gentle curve. Both create additional floor space, provide panoramic views, and allow significantly more natural light. They add architectural interest and kerb appeal, potentially increasing property value. Our double glazed bay windows and aluminium bay windows are available in various configurations, combining casement, fixed, or sash styles.
Professional window installation ensures your new windows perform as intended. Poorly fitted windows can lead to draughts, water ingress, condensation, and reduced energy efficiency. Our expert window installers are fully trained, FENSA registered, and experienced with all window types. FENSA registration means installations automatically comply with Building Regulations, with certificates for your records. As local window fitters, we provide reliable, quality installations backed by our 10-year guarantee.
Yes, you can replace a single window - there's no minimum order for window replacement. Our windows are made to measure, so whether you need one bathroom window or an entire house of replacement windows, we can help. Many customers replace windows in stages, prioritising the oldest or most draughty first. We can match new windows to existing double glazing where possible, ensuring a consistent look.
Modern secure windows feature advanced multi-point locking systems, internally glazed units (glass fitted from inside), toughened or laminated glass options, and reinforced frames. Our double glazed windows meet or exceed current British security standards. Secure windows act as a significant deterrent to burglars and can help reduce home insurance premiums. We offer additional security upgrades including anti-snap cylinders and enhanced locking mechanisms.
Tilt and turn windows offer two opening options: tilting inwards from the top for secure ventilation, or opening fully inwards like a door for easy cleaning and maximum airflow. Our aluminium tilt and turn windows are particularly popular for high-rise apartments, buildings where external access is difficult, and rooms requiring secure ventilation such as nurseries or ground floor bedrooms. Available in uPVC and aluminium, they're excellent for modern properties.
Flush casement windows feature sashes that sit completely flush with the frame when closed, creating a sleek, streamlined appearance. They're perfect for both modern double glazed windows installations and heritage properties where a traditional timber look is desired. Our aluminium flush casement windows offer ultra-slim sightlines for maximum glass area and natural light. Available in uPVC and aluminium, they combine contemporary aesthetics with excellent thermal performance.
uPVC double glazing is incredibly versatile and suitable for most property types, from modern new builds to Victorian terraces. With woodgrain finishes, heritage-style profiles, and a wide colour range, uPVC can complement virtually any architectural style. For properties in conservation areas where planning restrictions apply, our heritage-style uPVC windows often provide an acceptable alternative to timber. During double glazing installation, our team ensures every window is fitted to achieve optimal performance.
Many double glazing issues can be fixed without full replacement. Our double glazing repairs cover: misted or failed sealed units (condensation between panes), broken or stiff handles, faulty locks and hinges, dropped or misaligned doors/windows, draughts from worn seals, and minor frame damage. Replacing just the sealed units or hardware is often a fraction of the cost of new windows. We'll always advise honestly whether repair or replacement offers the best value.