Business Details
14 Years
experience
Highseal Manufacturing | Trusted Window & Door Manufacturer in Scunthorpe
Established in 2012, Highseal Manufacturing is a family-run business based in Scunthorpe, North Lincolnshire. We specialise in manufacturing high-quality PVC-u and aluminium windows, doors, conservatories, and roofing structures for trade, domestic, and commercial markets. With over 30 years of industry experience, we operate under CE Marking and BSI Kitemark (BS 7412) accreditations, ensuring compliance with Approved Document Q requirements.Our commitment to excellence is reflected in our 10-year product guarantee, focus on sustainability, and dedication to delivering tailored solutions. We serve clients nationwide, including remote areas of Scotland, and maintain strong relationships with leading building merchants. Our team combines technical expertise with a personable approach to provide guidance, quality products, and after-sales support.
Services
UPVC Windows
Aluminium Doors
Conservatories
Solid Roof Conversions
Composite Doors
Double Glazing
Lantern Roofs
Bifold Doors
Window Replacements
Trade Supply Services
Details
- Year established: 2012
Highlights and features
- We offer a 10-year product guarantee on all aluminium products.
- Our team has over 30 years of combined experience in fenestration.
- We are CE Marking and BSI Kitemark accredited for quality assurance.
- We provide nationwide coverage, including remote areas of Scotland.
- Our family-run business prioritises personalised service and transparency.
Associations and certifications
- CE Marking
- BSI Kitemark (BS 7412)
What people say
Quality products
Friendly service
Efficient installations
Excellent after-sales
Durable windows
Services
UPVC Windows
Our UPVC windows combine modern design with energy efficiency, available in vertical sliding sash, tilt-and-turn, and casement styles. They enhance property aesthetics while reducing heat loss. Ideal for residential and commercial properties seeking cost-effective, low-maintenance solutions.
Aluminium Doors
Durable aluminium doors feature multi-point locking systems and internal beading for enhanced security. They offer sleek, contemporary designs with a 10-year product guarantee. Suitable for both modern and traditional properties requiring robust entrance solutions.
Solid Roof Conversions
Solid Roof Conversions transform conservatories into year-round living spaces with excellent thermal performance. The system reduces noise from rain and maintains comfortable temperatures, ideal for extending usable home areas without compromising on style.
Composite Doors
Composite doors provide superior security and weather resistance with customizable designs, including contrasting frames and decorative glass. Available in traditional or contemporary styles, they enhance kerb appeal while offering long-lasting durability and minimal maintenance requirements.
Lantern Roofs
Lantern Roofs introduce natural light into homes with thermally broken systems that improve energy efficiency. The design creates a seamless connection between indoor and outdoor spaces, perfect for modern extensions and conservatory upgrades.
People
Sue Donaldson
Managing Director
With decades of fenestration industry experience, Sue oversees financial processes and customer service at Highseal Manufacturing. She transitioned to Managing Director after her husband Neil's passing in 2019, continuing his legacy of quality and fairness.
Holly Donaldson
Office Manager
Holly joined Highseal Manufacturing in 2016 after graduating with a Business Management degree. She supports operations with a focus on client interaction and business development, bringing enthusiasm and continuity to the family-run company.
Brian Robinson
Operations Manager
Brian leads installations with 30 years' experience in joinery and double glazing. He joined Highseal Manufacturing in 2021, progressing from Installation Manager to Operations Manager, combining technical expertise with management skills.
Christine Willerton
Processing Manager
Christine manages quotes, orders, and supplier relations with 20 years of fenestration industry expertise. Her approachable nature and technical knowledge make her a valued point of contact for trade and domestic clients.
Questions
What products does Highseal Manufacturing supply?
We supply PVC-u and aluminium windows, doors, conservatories, composite doors, lantern roofs, and solid roof systems for residential, commercial, and trade clients.
Are Highseal's products guaranteed?
Yes, all aluminium products come with a 10-year product guarantee, ensuring long-term performance and customer confidence.
Do you serve customers outside North Lincolnshire?
We operate nationwide across the UK, including remote areas of Scotland, supporting both local and national clients.
Can I customise my windows and doors?
Yes, we offer bespoke colour options, glass types, and design configurations for windows, doors, and conservatories to match individual preferences.
Is Highseal a family-run business?
Yes, we are a family-run manufacturer established in 2012, combining personal service with industry expertise.
What accreditations does Highseal hold?
We operate under CE Marking and BSI Kitemark (BS 7412) accreditations, meeting Approved Document Q requirements for quality and safety.
