Quality Window, Door and Conservatory Installations in Sussex

At Insulation Services, we are trusted door, window and conservatory installers in Sussex, providing high-quality home improvement solutions for over 48 years. We specialise in the supply and installation of double-glazed windows, replacement doors, and bespoke conservatories across Sussex, helping homeowners enhance comfort, security and energy efficiency.


Our experienced team supplies PVC-u, aluminium and hardwood frames, offering a wide range of modern and traditional styles to suit any property. Whether you’re looking to replace outdated windows, upgrade your front door, or add extra space with a beautifully designed conservatory, we deliver long-lasting, professional craftsmanship backed by excellent customer service.


We proudly serve local homes across East and West Sussex, including Brighton, Eastbourne, Crawley, Haywards Heath, Uckfield, Crowborough, Wadhurst and surrounding areas. Every installation is carried out by trained specialists using premium materials to ensure durability, thermal performance and a flawless finish.


If you want reliable, high quality window installers, door installers, or expert conservatory installation in Sussex, we’re here to help. Contact us today for a free survey and no-obligation quotation.

Speak to Our Team
Palladio doors approved installers
Rockdoor approved installers
Apeer doors approved installers
John Fredericks Plastics approved installers
The Residence Collection approved installers

Helping You Feel Comfortable at Home

Residence 9 windows installed in Sussex
Orangery with black aluminium windows and doors and lantern roof installed in Sussex
Polycarbonate roof canopy verandah in Sussex

Why Choose Insulation Services?

  • Over 48 years of experience
  • Sussex based, family run business
  • Fully guaranteed installations
  • Wide choice of materials and styles
  • Over 646 reviews with a 9.9 star rating across Checkatrade, Google and Yell
  • Understanding, helpful and experienced team

Double Glazed Window Installers in Sussex

Create a warm, safe, and stylish home with our windows and doors.  We take care of everything, from supply and installation of new windows/doors to repairs, including sealed unit replacements, locks, handles, and more.


We offer a huge variety of styles of window in PVCu, aluminium and hardwood, to best suit your home and budget. All of which are fully customisable to match your aesthetic with a wide choice of colours and fittings. Our windows are sourced from the best quality suppliers including The Residence Collection, Whiteline Manufacturing, Mercury Glazing, SMARTS Aluminium, Glyngary Joinery and John Fredericks Plastics, ensuring quality and durability.


Expert Door Installation Across Sussex


Our door range includes GRP composite, PVC-u, hardwood, aluminium, fire-rated options and garage doors, designed to give you lasting security and a beautiful finish. All of our doors are from the best quality suppliers including Palladio Doors, Rockdoor Composite Doors, Apeer Composite Doors, John Fredericks Plastics, Glyngary Joinery and Whiteline Manufacturing.

We’re here to keep your windows and doors working like new. Our repair service covers double and triple glazed sealed units, hinges, panels, locks, latches and cat flap installations.


We install windows and doors across Sussex, including Crowborough, Rotherfield, Mayfield, Tunbridge Wells, Pembury, Tonbridge, Crawley, East Grinstead, Forest Row, Uckfield, Lewes, Hailsham, Eastbourne, Horam, Wadhurst, Etchingham and everywhere in between. We have been serving clients across Sussex for over 48 years.


For advice, support, or to see our full range in person, simply give us a call or pop into our showroom—we’d love to help.

Learn More about Windows Learn More about Doors

Bespoke Conservatory Installations in Sussex

Bring your dream conservatory to life.  From the foundations and brickwork to the roof and electrics, we’ll take care of every detail - delivering a complete space that’s ready for you to enjoy.


Whether you’d love a classic timber conservatory, a bespoke PVC-u summerhouse, or a versatile all-season room, we’ll design and build it around your lifestyle.


We also offer a wide range of rooflight options, including Velux windows, roof lanterns, and glass fibre roofs. For the roof itself, choose between the elegance of glass or the year-round comfort of a warm roof with lightweight Tapco tiles.


Together, we’ll create a bright, relaxing space that you and your family can enjoy for years to come.

Learn More about Conservatories

Roofline Services

Protect and refresh your home's roofline. We supply and install soffits, fascia, guttering and cladding in a range of durable PVC and fibre cement options - designed to suit any style of property.


Choose from high-capacity gutters, vented soffits, and weather-resistant cladding to enhance both the look and protection of your home. By replacing damaged roofline elements, you are protecting your home from damp, mould and structural issues - ensuring proper ventilation and water drainage.


We also offer roofline replacements for conservatories, garages, carports, and more, giving you full control of upgrading your property.


Learn More about Fascia, Soffits, Guttering..

What our Customer's Say...

"Excellent and reliable prompt service from beginning to end. Professional, polite and friendly. Would use again without hesitation."

As expected, superb workmanship to replace fascia, soffit and guttering. We have used Insulation Services on a number of occasions and found them to be faultless. This piece of work simply added to that list of work carried out in a friendly, professional manner at a very reasonable cost. You've tried the rest - now try the best.

28 January 2026
Common Mistakes Homeowners Make and How to Avoid Them 1. Choosing Price Over Longevity When investing in home improvements such as new windows, doors or a conservatory, it’s sensible to obtain quotations from a few local businesses. However, it’s just as important to understand why those quotes may differ in price. A common mistake homeowners make is choosing the cheapest option - often to save money in the short term or because comparing quotations can feel complicated. While a lower price may seem appealing initially, there is usually a reason it’s cheaper. This might mean lower-quality products, rushed or substandard installation, limited or unclear guarantees, or a lack of care once the work is complete. These issues may not be obvious at first, but they can lead to inconvenience, repairs, or additional costs further down the line. To avoid this, ask each company to clearly explain what is included in their quotation - and what isn’t. Take time to read reviews, look at how long the business has been established, understand the expected lifespan of the products being offered, and what ongoing maintenance may be required. 2. Not Planning for the Future If you’re considering investing in your home, it’s worth asking yourself whether you’re planning for the future or focusing only on what works right now. While it’s natural to look for solutions that meet your immediate needs, it’s just as important to consider how you will find them in the future. What happens when the children move out, or if working from home becomes permanent? A solution that feels convenient today could become limiting or impractical in years to come. Before making any significant changes, take a moment to think five or even ten years ahead. Is the decision going to continue to serve you well, or will it be less suited to you in the future. 3. Choosing a Company Who Communicate Poorly Choosing value over price also means choosing a business that communicates clearly with you. Good communication is essential when someone is working on your home. There’s nothing worse than small misunderstandings becoming big problems when you believe something is included, only to find it isn’t, or has been done differently to what you expected. Be wary of businesses giving vague answers, rushing decisions and not wanting to explain things. Any business that avoids detail or pressures you to move forward before you fully understand what’s involved is not a good choice. A reputable company will take the time to explain your options and make sure everything is clear from the outset. To avoid issues later on, ask plenty of questions and ensure you’re comfortable with the answers before proceeding. Most importantly, make sure all agreed details are clearly set out in writing on your quotation or order form before you commit. Mistakes are easily made but they are avoidable if you know what to look for. Base your decisions on good, clear information that comes from trusted businesses and you should be in safe hands. If you’re thinking of investing in new windows , doors , a conservatory or roofline repairs and want honest advice, we are here to help. 
15 January 2026
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grey composite front door installed in sussex
17 December 2025
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white PVCu window in sussex
10 December 2025
Ventilation plays a huge role in keeping a home healthy and comfortable, but it’s something many people only think about when problems like condensation or stuffy rooms appear. One small, often overlooked feature that can make a big difference is the trickle vent. So, what exactly are trickle vents? Trickle vents are small openings built into the frames of windows that allow a controlled amount of fresh air to circulate indoors, even when the window is closed. They’re usually found at the top of modern windows and can be opened or closed manually with a simple slider. Why do homes need trickle vents? Moisture, indoor pollutants, and stale air build up in every home through everyday activities such as cooking, showering, drying clothes, or simply breathing. If this moisture has nowhere to escape, it can lead to condensation, damp patches and peeling paint, black mould, poor air quality and musty smells. Trickle vents provide continuous background ventilation, helping prevent these issues by allowing moisture-laden air to escape and fresh air to enter. Are trickle vents a requirement? In the UK, building regulations now (since 2022) require the use of trickle vents in most replacement and new-build windows to maintain healthy airflow. They help ensure a minimum level of ventilation without relying on windows being open all day long. Do trickle vents make your home colder? This is a common concern, but they don’t have a significant impact on the temperature of your home. Trickle vents allow only a small, controlled flow of air. They don’t create large drafts, and they shouldn’t noticeably reduce the warmth of your home. In fact, by reducing dampness and improving air quality, they often make a home feel more comfortable. Should you keep trickle vents open? For the best results, yes, especially in winter when condensation is most likely. You can close them if needed (for example, during high winds), but keeping them open ensures a steady flow of fresh air and keeps humidity under control. Trickle vents may be small, but they play a big role in maintaining a healthy indoor environment. They’re a simple, cost-effective way to reduce condensation, prevent mould, and improve overall air quality — all without opening your windows or compromising security.
glass conservatory interior view - installed in Sussex
10 December 2025
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PVCu vertical sliding windows
5 December 2025
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10 September 2025
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31 July 2025
5 Reasons you should invest in a conservatory for your home More Space and Comfort Create an extra living space in your home to enjoy. A conservatory can work for many purposes whether it becomes an entertainment space, relaxation pod, home office or something else, you can enjoy the comfort of a larger home. 2. More Natural Light With large windows and glass roofs, conservatories provide beautiful views of your garden and bring the outdoors in. They offer a tranquil space filled with natural light, perfect for relaxation year-round. 3. Increase Kerb Appeal A well constructed and aesthetically appealing conservatory can add value to your home when it comes to selling. It is an enticing space that can encourage buyers to consider purchasing a property. 4. Fully customisable and cost effective extension Conservatories are often more affordable and faster to build than major structural extensions, and often don’t require planning permission. Plus, you can fully customise the style and design of your conservatory to suit your needs and the aesthetics of your home. 5. Thermal efficiency Constructed with double or triple glazed and thermally efficient windows and doors, conservatories provide an energy saving space to enjoy all year round.
22 July 2025
Improvements in the manufacturing and materials of modern windows and doors can significantly improve thermal efficiency, saving you money and contributing more to protecting the environment. Modern options include wood, PVCu, aluminium and composite GRP, each offering unique benefits. Whilst many homes were originally built with wooden windows and doors, the features and manufacturing of modern materials have improved vastly to offer better insulation and durability. Wood is a natural insulator and retains heat very efficiently, but older windows/doors often suffer from moisture and insect damage, reducing efficiency. At Insulation Services, we offer windows and doors crafted from Accoya wood . Accoya is sustainably sourced from responsibly managed forests and has a low carbon footprint. Due to the unique properties of Accoya, it is indigestible to a wide range of pests, providing a highly effective barrier to insect infestations. Further checks have been undertaken to ensure accoya wood is trusted not to swell, shrink or distort, remaining highly durable for 70 years plus. Since 2002, new regulations require new windows and doors to be double glazed, replacing the single pane glass commonly used in older homes. Double and triple glazing combined with thicker frames, significantly improves the heat retention and thermal efficiency of modern windows. A more cost-effective choice that still offers excellent energy efficiency is PVCu. Thanks to its multi-chambered frame, air is trapped inside to reduce heat transfer. The material itself is a low thermal conductor, helping your home stay warm by limiting heat loss. PVCu is also highly durable and weather resistant. It doesn’t absorb water, so it’s less likely to warp or lose shape over time. Its lightweight design puts less strain on hinges, helping your windows and doors function smoothly for years to come. For those wanting slim sightlines and maximal glass space whilst ensuring thermal efficiency, aluminium is a great choice. Similarly to PVCu, aluminium windows feature chambered profiles that trap air to reduce heat transfer. Because aluminium is naturally a good heat conductor, a thermal break is incorporated to further minimize heat loss, ensuring aluminium windows meet modern energy efficiency standards. Composite GRP is currently the top choice for thermally efficient doors on the market. These doors are made by compressing multiple materials under high pressure. They typically feature a solid timber inner frame (though not all models include timber) and a high-insulation foam core, all encased by a thick glass-reinforced plastic (GRP) skin on both sides—usually thicker than a standard PVCu door skin. Some of our doors also offer an optional steel mesh embedded within the foam core for added strength and security. While thermal efficiency is important for saving money and protecting the environment, proper ventilation also plays a key role. Adding trickle vents to window frames ensures a steady flow of fresh air between indoors and outdoors. This continuous ventilation helps prevent moisture and condensation build up, reducing the risk of mould and damage inside your home. Another effective way to reduce energy consumption in your home is by adding more windows. Roof windows offer a variety of styles to brighten your space with natural light, helping to lower your electricity usage. In summary, upgrading to modern windows and doors offers significant potential to reduce energy costs and support environmental sustainability. Advances in manufacturing mean that all new windows and doors now meet high standards of thermal efficiency. While some materials offer superior performance, there are affordable options and styles available to suit both your budget and the character of your home. Additional features like trickle vents can also help protect your property by preventing moisture build-up, while roof windows are a great way to increase natural light and reduce reliance on artificial lighting.
timber pvc door
22 July 2025
Windows and doors are a major aspect of your home. Not only do they keep you safe from the elements all year round, but they also provide security and comfort for your family. Modern windows and doors are not all about functionality, they also bring a stylish and aesthetic appeal to your home! Create your very own grand entrance with a new front door, available in PVCu, Composite GRP, Aluminium and Hardwood with double or triple glazing, choose a colour to suit you and any furniture to make everything bespoke to your requirements. Why stop at a front door when you can have a bespoke porch or door pillar surrounds installed to complete the look? New replacement windows will not only improve your home visually, they will also improve energy efficiency in your home, in turn, reducing your heating bills. Replacement windows come with enhanced security and can reduce outside noise. Windows are available in PVCu, Aluminium and Hardwood and are available in a range of colours and styles to suit you. They use the latest ultra efficient double or triple glazing. If you require extra space or to turn your existing conservatory into an all year round room, consider a warm roof. In many cases, the original windows and doors can be kept by reinforcing them with extra posts and the roof can be removed and replaced with either an insulated flat roof or warm tiled roof. The flat roof option uses either a fibreglass GRP finish or a liquid rubber finish. The tiled roof option uses light weight composite composite tiles, which come in a variety of colours and look like authentic slate tiles. Glass roof lights can be added to give the room extra light. Your roof can be finished internally with plaster to look like other rooms in your home.

Visit Us

Insulation Services, Vision House, Crowborough Hill, TN6 2EG


Monday to Friday 9am to 5pm


01892 661858

info@insulation-services.co.uk