Choosing the right double glazing company can make a huge difference to your home’s comfort, energy efficiency, security, and long-term value. Across Kent, homeowners are investing in modern double glazing to reduce heat loss, cut energy bills, improve sound insulation, and enhance kerb appeal. Whether you live in a period property in Canterbury, a coastal home in Whitstable, or a modern build in Maidstone, finding a reputable installer is essential.
The Kent market is filled with glazing specialists offering everything from uPVC windows and aluminium bifolds to conservatories and triple glazing. However, not all companies provide the same level of craftsmanship, guarantees, or customer service. This guide explores some of the best double glazing companies in Kent based on reputation, experience, customer reviews, range of services, and industry accreditations.
Why Double Glazing Matters
Double glazing has become one of the most important upgrades for UK homes. Modern units use two panes of glass separated by insulating gas or air, dramatically improving thermal performance compared to older single-glazed windows.
The benefits include:
- Reduced heat loss and lower energy bills
- Improved sound insulation
- Better home security
- Reduced condensation
- Increased property value
- Enhanced aesthetics and kerb appeal
Many Kent homeowners are now also choosing energy-efficient glazing because of rising heating costs and stricter energy efficiency expectations in the UK housing market.
When selecting a company, it’s important to look for FENSA or CERTASS registration, strong warranties, transparent pricing, and positive customer feedback.
Top Double Glazing Companies in Kent
1. Apollo Windows
One of Kent’s best-known names in home improvement, Apollo Windows has built a strong reputation for supplying and installing high-quality windows, doors, conservatories, and roofline products. Based near Maidstone, the company serves homeowners across Kent and surrounding areas.
Apollo Windows stands out because of its extensive product range and experienced installation teams. Customers frequently praise the company for professionalism, attention to detail, and reliable aftercare. The business also offers modern aluminium systems alongside classic uPVC designs, making it suitable for both contemporary and traditional properties.
With over 100 customer reviews and consistently high ratings, Apollo Windows remains one of the most trusted installers in the county.
Best for:
- Full home renovations
- Conservatories and extensions
- Aluminium glazing systems
2. Medway Windows & Doors Ltd
For homeowners seeking a highly rated local installer, Medway Windows & Doors is a standout option. Based in Rochester, the company has earned an exceptional reputation for customer service and installation quality.
The business specialises in:
- uPVC windows
- Composite doors
- Sliding patio systems
- Bifold doors
- Energy-efficient glazing
One major advantage is the company’s focus on tailored solutions rather than one-size-fits-all installations. Homeowners often mention clear communication and tidy workmanship as key strengths.
With excellent review scores and a strong local presence, Medway Windows & Doors is ideal for customers wanting a personalised service.
Best for:
- Bespoke residential glazing
- Composite entrance doors
- Local customer service
3. All Clear Windows
Serving Herne Bay and the wider East Kent region, All Clear Windows has become one of the area’s most respected independent glazing installers.
The company focuses heavily on energy efficiency and modern window technology. Their products include:
- Flush sash windows
- Casement windows
- French doors
- Conservatories
- Roof lanterns
Customers often praise the company’s reliability, installation quality, and responsive support. The business is particularly popular among homeowners upgrading older coastal properties where insulation and weather resistance are essential.
Its excellent review profile makes All Clear Windows one of the strongest choices in East Kent.
Best for:
- Coastal homes
- Energy-efficient upgrades
- East Kent homeowners
4. Dartford Glazing Ltd
Dartford Glazing has established itself as one of North Kent’s leading specialists for repairs, replacements, and emergency glazing services. The company operates 24/7 and has built an impressive reputation through fast response times and consistent workmanship.
While many companies focus only on new installations, Dartford Glazing also handles:
- Emergency boarding
- Broken glass replacement
- Window repairs
- Door repairs
- Commercial glazing
This versatility makes them especially valuable for landlords, commercial properties, and homeowners requiring urgent support.
The company also boasts one of the largest review counts among Kent glazing businesses, indicating strong customer trust and long-term reliability.
Best for:
- Emergency glazing
- Repairs and maintenance
- North Kent properties
5. AK Glass Windows and Doors Ltd
AK Glass Windows and Doors has become increasingly popular among homeowners in Maidstone and nearby towns thanks to its modern approach and high customer satisfaction levels.
The company supplies:
- Aluminium windows
- uPVC systems
- Composite doors
- Sliding doors
- Custom glazing solutions
AK Glass focuses strongly on premium finishes and modern aesthetics, making it a good option for homeowners undertaking stylish renovations or contemporary extensions.
The business also receives consistent praise for professionalism and smooth installations.
Best for:
- Contemporary home upgrades
- Aluminium windows
- Stylish modern designs
6. RL Glazing Ltd
RL Glazing is a smaller independent installer based near Ashford, but its reputation continues to grow rapidly throughout Kent.
Many customers choose RL Glazing because of its:
- Competitive pricing
- Honest advice
- Personal service
- Attention to detail
Independent glazing firms often deliver a more customer-focused experience than national chains, and RL Glazing is a strong example of this. The company maintains excellent customer feedback and is especially popular with homeowners seeking affordable but reliable installations.
Best for:
- Budget-conscious homeowners
- Personalised installations
- Ashford area properties
7. Extreme Windows Ltd
Extreme Windows Ltd has become one of the fastest-growing glazing companies in Kent, offering modern products and comprehensive installation services.
The company specialises in:
- Bifold doors
- Triple glazing
- Energy-efficient windows
- Contemporary aluminium systems
Their strong customer reviews suggest a focus on both product quality and aftercare support. Homeowners particularly appreciate the company’s responsive communication and installation standards.
For modern renovations and open-plan living projects, Extreme Windows is an excellent choice.
Best for:
- Modern home transformations
- Bifold doors
- Triple glazing upgrades
8. EcoChoice Double Glazing
As environmental awareness grows, many homeowners are prioritising sustainability and energy efficiency. EcoChoice Double Glazing positions itself specifically around eco-friendly home improvements.
The company offers:
- Thermally efficient glazing
- Sustainable product options
- Modern insulation-focused installations
Their products are designed to help reduce household energy consumption while improving comfort levels year-round.
For environmentally conscious homeowners in Kent, Eco Choice is one of the strongest specialist providers available.
Best for:
- Eco-conscious homeowners
- Energy savings
- Sustainable glazing solutions
Other Notable Double Glazing Companies in Kent
Several additional companies also deserve consideration:
- Sawkins Double Glazing – Highly rated independent installer in Sittingbourne.
- Tunbridge Wells Double Glazing Limited – Well-reviewed local specialist serving West Kent.
- SOUTHERN WINDOWS & DOORS – Popular for doors and modern glazing systems in Sheerness.
- Double Glazing Doctor (East Kent) – Excellent for repairs and replacement units.
- All Kent Windows – Established installer with strong customer ratings.
What to Look for in a Double Glazing Company
Before committing to any installer, there are several important considerations.
1. Accreditation
Always check whether the company is registered with:
- FENSA
- CERTASS
- TrustMark
These accreditations help ensure compliance with UK building regulations.
Several Kent companies prominently advertise their accreditation status, including Channel Windows and Sage Installations.
2. Guarantees
A reputable installer should provide:
- Product guarantees
- Installation warranties
- Insurance-backed guarantees
Many leading Kent firms offer 10-year warranties on products and installation work.
3. Product Range
Good glazing companies should offer multiple frame materials:
- uPVC
- Aluminium
- Timber-effect
- Composite systems
This ensures you can find styles suited to your property.
4. Customer Reviews
Review scores provide valuable insight into:
- Reliability
- Installation quality
- Communication
- Aftercare support
Companies like Dartford Glazing, Medway Windows & Doors, and All Clear Windows consistently achieve excellent ratings from customers.
5. Energy Efficiency
Modern double glazing should meet strong thermal efficiency standards. Look for:
- Low-E glass
- Argon-filled units
- A-rated windows
These features can significantly improve household energy performance.
Double Glazing Costs in Kent
Prices vary depending on property size, frame material, and installation complexity. Typical estimates include:
| Product | Average Cost |
|---|---|
| uPVC window | £500–£900 |
| Aluminium window | £800–£1,500 |
| Composite front door | £1,200–£2,500 |
| Bifold doors | £3,000–£8,000 |
| Conservatory | £10,000+ |
Many Kent companies provide free quotes and surveys, allowing homeowners to compare options before committing.
Is Triple Glazing Worth It?
Some Kent installers now offer triple glazing upgrades, including Britelite and Extreme Windows. Triple glazing provides:
- Improved insulation
- Better noise reduction
- Enhanced thermal efficiency
However, it also costs more than standard double glazing. For many UK homes, high-quality double glazing remains the most cost-effective solution.
Britelite has even promoted triple glazing upgrades at double glazing prices in some campaigns.
Final Thoughts
Kent has a highly competitive double glazing market with excellent local and regional installers available. The best company for your home depends on your budget, property style, and project goals.
For premium home improvement projects, Apollo Windows and Extreme Windows Ltd stand out for modern glazing systems and large-scale renovations.
For personalised local service, Medway Windows & Doors Ltd and RL Glazing Ltd are excellent choices.
If energy efficiency is your priority, Eco Choice Double Glazing and All Clear Windows are particularly strong options.
The key to success is comparing multiple quotes, checking accreditations, reading customer reviews, and selecting a company with a proven track record of quality installations and aftercare support.
With the right installer, double glazing can transform your Kent home — improving comfort, reducing energy bills, and adding lasting value for years to come.
