Business Details
Your Trusted UPVC Windows and Doors Specialists in Middlesbrough
At Sealtight Windows, we are a family-run business with over two decades of experience in manufacturing and installing Kommerling UPVC windows, doors, conservatories, and orangeries across Teesside and surrounding areas. Our process begins with understanding your specific requirements, ensuring a straightforward experience with transparent pricing and no high-pressure sales tactics. All work is completed by our own highly experienced tradesmen, guaranteeing quality craftsmanship and minimal disruption to your household. With over 40 years combined industry expertise, we prioritise customer satisfaction through tailored solutions and comprehensive aftercare.Our products feature advanced security systems, durable materials with fade-resistant guarantees, and energy-efficient designs to enhance home comfort. We maintain strong relationships with suppliers like Kommerling and Pilkington Glass to deliver premium materials, while our installation teams ensure meticulous attention to detail. From initial consultation to final installation, we provide a seamless service supported by insurance-backed guarantees, demonstrating our commitment to reliability and excellence in every project.
Services
UPVC Windows
Composite Doors
Conservatories
Orangeries
Porches
Highlights and features
- We use our own experienced tradesmen with no subcontractors
- Our products feature insurance-rated multi-point locking systems
- PVC-U materials guaranteed not to fade, warp or rot
- Over 40 years combined experience in the window and door trade
- No high-pressure selling with second-to-none aftercare service
What people say
Extremely impressed
Fantastic company
Stress free building work
Professional installation
Excellent work
Services
UPVC Windows
Our energy-rated UPVC windows feature 70mm profile depth with patented 5-chamber construction for superior thermal efficiency. Internally beaded frames enhance security while multi-point locking systems provide insurance-rated protection. Available in 44 colours including Anthracite Grey and traditional cream finishes, these windows combine modern insulation technology with classic aesthetics to reduce energy bills and improve home comfort.
Composite Doors
Reinforced composite doors incorporate multi-point hook locks and durable foam-core construction for optimal insulation. Solidor models feature hardwood timber cores with 10-year guarantees, available in 20 premium finishes. Our doors maintain structural integrity while offering custom glazing options, lead designs, and bevel patterns to create secure yet stylish entrance solutions that resist warping and fading.
Conservatories
We construct thermally efficient conservatories using Ultraframe LivinROOF systems with insulated composite panels and optional glazed sections. These structures maintain comfortable temperatures year-round while offering design flexibility with Eurocell polycarbonate or Activ Blue glass roof options. Our installations include vaulted ceilings, integrated lighting, and seamless guttering solutions to create functional living spaces that blend with existing architecture.
Orangeries
Custom orangeries feature full-height brickwork with premium window and door combinations, topped with insulated roof lanterns. Available with solar-control glazing and multiple colour finishes, these extensions create elegant living spaces that enhance property value. Our team ensures precise integration with existing structures while maintaining maximum natural light and thermal performance.
Porches
We design and install UPVC and composite porches that enhance home security while creating welcoming entrance areas. Available in various architectural styles with decorative glazing options, our porches incorporate weather-resistant materials and secure locking systems to provide durable, low-maintenance solutions that complement property exteriors.
People
Brian
Sales Manager
With extensive industry knowledge, Brian provides expert guidance through the design and planning process, ensuring customers receive tailored solutions that meet their specific requirements and budget.
Richard
Office Manager
Richard coordinates project logistics and customer communications, maintaining efficient operations while ensuring clear, professional support throughout the installation process.
Questions
What services does Sealtight Windows offer?
We specialise in UPVC windows, composite doors, conservatories, orangeries, and porches with full manufacturing and installation services.
Are your products secure?
All windows include multi-point locking systems, while doors feature insurance-rated hook locks and Solidor composite door technology.
Can I customise my windows and doors?
We offer extensive customisation including 44 colour options, various glazing designs, and multiple door styles to suit individual preferences.
How long does installation take?
Most installations complete within 1-3 days depending on project complexity, with conservatory installations typically taking 3-4 days.
Do you operate outside Teesside?
While based in Teesside, we serve surrounding areas - please contact us to confirm coverage for your specific location.
Reviews (2)
David Hart
Oct 28, 2021
Report
Highly recommend a visit if looking to replace windows and doors just to see the quality of the product available. We have now had the whole house doors and windows replaced and the fitters Ian and Graham could not have been more helpful and pleasant it was a real pleasure meeting them. The quality of work was excellent the service and product we highly recommend. Thank You Sealtight NE.
Andrew Harding
Oct 23, 2020
Report
Ordered my new front door days before
Lockdown, fitted this morning, worth the wait, beautiful finish,top quality,
Very happy.
Lockdown, fitted this morning, worth the wait, beautiful finish,top quality,
Very happy.
