Welcome to Astraseal

Welcome to the Astraseal website; home to one of the most prominent uPVC and aluminium window, door and conservatory manufacturers, suppliers and installers in the UK.

Extensive product range

Partnering with leading systems suppliers REHAU, Smarts, Eurocell and Kawneer, Astraseal offer one of the most comprehensive and technically advanced product ranges on the market.

Fully certified

We are a trusted fabricator and all of our products are fully certified with British standards bodies. Our industry-recognised certifications demonstrate a commitment to excellence at every phase.

State-of-the-art fabrication

We are constantly investing in our manufacturing facilities and machinery allowing us to not only meet increased demand but to ensure we are providing our customers with precision, quality enhanced products.

Introduction

Whatever your project

Astraseal Group is made up of 5 specialist areas. Explore the site relevant to your needs and learn more about our company, our products and the services we offer.

Trade

Looking for a reliable trade windows and doors supplier, then look no further. Whatever your project, we have it covered.

Commercial

Astraseal is a reliable commercial supplier specialising in social housing and new build development projects.

Win-dor

A home improvement company providing high-quality windows, doors and conservatories to Milton Keynes and surrounding areas.

Fire Doors

Safe. Reliable. Quality assured. We lead the way for higher Fire Door safety standards. Explore our certified range of fire products here.

Special Projects

SPD is a specialist multi-room division of Astraseal. A department dedicated to delivering large scale fenestration solutions.

Who we are

About Astraseal

Established in 1979, Astraseal is one of the largest uPVC and aluminium window, door and conservatory manufacturers and suppliers in the UK.

Operating from three manufacturing sites, totalling 110,000 square feet, our comprehensive and premium quality selection of products allows us to meet the fenestration needs of any project.

Trade

Astraseal Trade is a supply only service working with installers and builders across the UK. As an Astraseal trade customer not only will you have access to a wide choice of premium uPVC and aluminium glazing systems, you will also benefit from 24 hour quote return times, a dedicated trade account manager, fast lead times, competitive prices and nationwide delivery service in our own fleet of vehicles.

Commercial

Astraseal is a reliable commercial contractor specialising in providing full-service replacement window and doors programmes for social housing and local authorities and large-scale supply and installs for new build development projects. From survey, manufacture, through to install our expert commercial department has an outstanding track record which sees us successfully install over 80,000 products a year.

Domestic

Established in 1978, Win-Dor has grown to become a reputable and reliable home improvement and double glazing specialist serving Milton Keynes and the surrounding areas. We offer an extensive range of windows, doors and other glazing solutions all of which are available in a rich choice of colours, and are backed by our 10 year guarantee. Over 45 years on, we continue to provide an excellent service.

Special Projects

Astraseal have recently launched a Specialist Projects division. A dedicated department providing revolutionary new glazing fenestration solutions for large scale multi-room, high rise building projects. The SPD team are experts in their field and form a knowledgeable group of CAD Technicians, Architects, technical fenestration experts, Structural Engineers, facade specialists and fully qualified site managers.

What we do

Services we offer

Expert manufacturers

All of our products are fabricated in-house at our 110,000 sq ft factory in Wellingborough. We’ve made significant machinery investments which most recently include a new Glaston IGU line, a state-of-the-art cutting table for laminated glass and a brand new eight head automated frame welding and cleaning line. Manufacturing more than 4,000 frames per week our continued investment allows us to ensure we provide precision, quality enhanced products with proven reliability every time.

Supply and Install

Not only do we operate on a supply only basis for our trade customers, Astraseal also offer a comprehensive and bespoke supply and fit service whereby our expert team can provide full survey on site and fitted by our experienced installation team who have installed products in numerous high-profile projects across the UK. We install over 80,000 products each year and can work on both small and large scale contracts to complete your project ideals.

Our products

Partnering with leading systems suppliers REHAU, Smarts, Eurocell and Kawneer we offer one of the most comprehensive and technically advanced product ranges on the market. If you’re looking for a reliable fabricator to cover all your uPVC and aluminium glazing needs, then look no further. Our product range includes:

• Windows and Doors
• Sliding, Patio and Bi-fold Doors
• Composite Doors
• Skylights and Roof Lanterns
• Conservatory Roofing solutions
• Commercial entrance systems
• Fire Doors and windows

Fire related products

As market leaders in fire related products we have worked in partnership with architects, developers, housing associations and local authorities providing a complete solution from enquiry through survey, design, manufacture and installation and go on to include an opportunity for a maintenance contract. All stages of the process are subject to testing, training programmes and certification to give clients the assurance that every door was backed up with unequivocal evidence proving its performance.

More info

In-house spray facility

At Astraseal, our in-house spraying facility means we can offer our full range of glazing products in any colour, allowing customers to meet the demands of any residential or commercial project. Whether its windows, doors, conservatories or even composite doors, we can offer over 150 RAL colours, an extensive range of woodgrain and metallic foils and dual colour options. No peeling, cracking or fading and with all our coloured frames they are backed by a 10 year quality guarantee, giving customers extra peace of mind.

Certifications

As a fully certified and reliable fabricator, Astraseal upholds the highest standards in quality, compliance, and customer service. Our industry-recognised certifications demonstrate a commitment to excellence at every phase— from materials procurement and precision fabrication to expert installation. With a solid reputation and extensive experience, we are a trusted partner for delivering consistent results, technical expertise, and dependable project execution.