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 Whether you’re looking to replace outdated windows, upgrade your front door, or add extra space with a beautifully designed conservatory, we deliver long-lasting, professional craftsmanship backed by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

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.

10 December 2025
What are Trickle Vents?
10 December 2025
What are U Values and Why are They Important to Consider?
5 December 2025
How to Find a Good Window Installer in Sussex
10 September 2025
How can I improve the insulation of single glazed windows?
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.
by S COTTINGHAM 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.
composite door installations sussex
22 July 2025
Create an attractive, aesthetically pleasing home whilst enhancing comfort and thermal efficiency. Explore how new windows, doors, conservatories, cladding, fascia and soffit can transform your home. A simple way to improve comfort through enhanced heat retention, sufficient air circulation, additional space and enhanced security. Gain protection from water damage and dampness. At the same time you’ll be increasing the kerb appeal of your home, enticing visitors and catching the attention of potential buyers. With ever increasing technology available, manufacturing of windows and doors has improved significantly. Homes are able to be much more energy efficient, retaining as much warmth as possible and helping to reduce your heating bills! Through the use of double and triple glazed sealed units, heat transfer from both inside and outside of your home is slowed down, helping to keep heat inside your home. Double and triple glazing is also useful to reduce condensation on your windows. Although it may not seem a huge issue, condensation can lead to mould, damage to walls, curtains and other parts of your home. Another feature of windows and doors that has been introduced is the use of trickle vents, now compulsory on new builds. Trickle vents sit in the frame of the door/window and allow constant ventilation into and out of the room, reducing the build up of moisture and removing ‘stale air’ from inside. Further to this, security features of both windows and doors have been improved, through enhanced locking systems and the use of stronger materials, to provide maximum protection for your family and belongings. Windows and doors are available in a wider range of materials, including pvc-u, aluminium, composite and hardwood, creating a more robust frame whilst giving you a huge choice of styles and colours to suit you. Create further kerb appeal and extra convenience on rainy days with a custom built porch entrance, a porch or pillar entrance gives your home a bespoke style and may help catch the interest of potential buyers. Add comfort to your home and create a new space to enjoy with a conservatory, orangery or all weather room! Enjoy better views of your garden from the comfort and warmth of being inside especially in winter, and bring more light into your home with larger window spaces. Worried about losing warmth during winter? As with windows and doors, conservatory buildings are also advancing, with many people now choosing to have a warm roof with skylights or lantern roof windows. This still allows light to flood the room, giving you an open, airy feel whilst also retaining more heat than a glass roof conservatory. With the wide range of materials available, you can create your very own, bespoke room in a style that suits you and your home, maintaining maximum comfort and creating aesthetic appeal. Add cladding and replace old fascia and soffits to further improve appearance, insulation and weather resistance. Protect the longevity of the foundations of your home by preventing water damage and protecting from wear and tear. You may choose to add cladding to bring a modernised appearance and increasing kerb appeal. Fascia and soffit boards should be replaced when old and worn to ensure protection to the walls and roof whilst providing support for guttering. Functioning guttering is vital to protect your home from water damage, damp and mould which could have a detrimental effect to fascia, soffits, walls, ceilings, window frames and paint. Give your home a new life, add protection and increase energy efficiency with these home improvements. Enjoy exploring the range of styles, materials and colours now available to create bespoke improvements to your home. It’s important to use a company you can trust to take care of you and your home, Insulation Services is a family run business, serving customers across Sussex since 1977, visit our showroom to see what there is to offer or give us a call today.
by S COTTINGHAM 22 July 2025
Project Summary: Replacement of all old windows and doors for whole residential property. Key features of this project were: - New replacement 9 x PVCu windows to whole property - New replacement Front Door with single glazed panel - New replacement Back Door with double glazed panels Project Details: Insulation Services were appointed by clients after checking our reviews on Checkatrade and visiting our showrooms. Insulation Services visited the home to discuss options and designs for all windows and doors; timescales and budgets were also discussed. The bespoke quotation was prepared which included full details of the proposed products, the price, together with terms and conditions – all set out to fully inform the customer of everything involved. A set of pictures accompanied the quotation to illustrate each design style, layout and relative sizes. The work involved a series of 4 key stages: 1. Measuring and Pricing 2. Procurement and Planning 3. Risk Assessment and Method Statement 4. Installation The windows and doors products are all PVCu – selected for their style, performance and value for money. The front door is an ‘Assington’ style door featuring a high security locking system and an Irish Oak exterior and white interior, an obscure toughened glass sealed unit (to allow light into the hallway) and antique black door furniture. The windows are ‘A’ rated with 6 chambers for improved energy efficiency; they are internally glazed with argon filled 28 mm double glazed sealed units. We deployed a 2-man team to carry out the removal and installation work, liaising closely with the customer for the sequence of working (to cause least disruption and disturbance). All windows and doors were carefully and safely installed within one week on site. All waste materials were removed from site daily and the outside of the house was tidied up on completion. A follow up visit was arranged to address the last minor adjustments and to demonstrate how the windows opened for cleaning. Testimonial: “I am very happy with the new windows and doors; they make such a difference. The old windows had leaks and gaps and were very draughty! Now the newly installed windows are warmer and quieter – as well as looking good. I am happy to recommend Insulation Services.”
22 July 2025
The trend for building traditional conservatories is fading; instead, new exciting and innovative ideas are being developed and realised as more people want a better year-round useable extension to their homes (rather than a glass box that can often only be used for a few months of the year when it’s not too hot and not too cold!). Insulation Services has recognised and met this trend by supplying and installing new ‘Warm Roof’ products and ‘Orangeries’ in modern styles that offer year-round comfort and useability – a real purposeful solution to what is sometimes no more than a greenhouse! So, what is a Warm Roof? It is a solid roof system designed for all year-round comfort. Insulation Services uses an award-winning solid roof system which is the most configurable and structurally robust, insulated and tiled roof in the UK. Thanks to the advanced technology, the building control approved roof provides the highest levels of thermal efficiency. The warm roof system is incredibly versatile to perfectly fit any home. No matter what shape or size, the design can be configured to suit layout and space requirements. - Award-winning solid roof - First class thermal efficiency - Hybrid glass panel upgrades - Customisable design The roof covering uses ’Tapcoslate’ tiles – these are a mixture of limestone and PVC and provide a lightweight alternative to traditional slate tiles; Tapcoslate tiles are easy to cut and work with on site without compromising performance. They are identical to natural slate in their appearance so are the perfect choice for an authentic, detailed roof design. Tapcoslate tiles are moulded from real slate tiles but unlike natural slate, they will not break or delaminate and are available in a range of authentic colours.

Visit Us

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


Monday to Friday 9am to 5pm


01892 661858

info@insulation-services.co.uk