Business Details
Expert UPVC Windows & Doors 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 a single transparent quotation valid for 30 days. We pride ourselves on using our own highly experienced tradesmen for every project, guaranteeing high standards with minimal disruption to your household. With over 40 years of combined industry expertise, we prioritise customer satisfaction through tailored solutions and a no-pressure approach. Our commitment to quality is reflected in our use of durable, eco-friendly materials and comprehensive guarantees, including a 25-year colourfast warranty on white UPVC.We offer a wide range of customisation options, from colour finishes to glazing designs, ensuring every product meets your unique preferences. Our showroom in Middlesbrough showcases full-size displays of our products, allowing you to visualise potential installations. We maintain a strong reputation through recommendations, underpinned by our focus on security features like insurance-rated multi-point locking systems. Our team remains available daily in the factory and showroom to address any queries, ensuring a seamless customer journey from initial consultation to project completion.
Services
UPVC Windows
Composite Doors
Conservatories
Orangeries
Solidor Doors
Highlights and features
- We use our own experienced tradesmen with over 40 years combined industry expertise
- Our products feature insurance-rated multi-point locking systems for enhanced security
- We guarantee durable PVC-U materials that won't fade, warp or rot
- We offer a second-to-none aftercare service with no high-pressure selling
- We provide comprehensive 25-year colourfast guarantees on white UPVC products
What people say
Extremely impressed
Fantastic company
Most stress free building work
Highly experienced tradesmen
No mess at all
Services
UPVC Windows
Our energy-rated UPVC windows feature multi-point locking systems for enhanced security. Manufactured using Kommerling profiles with 5-chamber thermal insulation technology, they offer superior energy efficiency while maintaining aesthetic appeal. Available in 44 colour options including traditional cream and modern anthracite grey, these windows incorporate Pilkington glass for optimal performance. The patented 70mm profile depth ensures structural integrity while internal beading enhances security. Every installation comes with a comprehensive 25-year colourfast guarantee on white UPVC finishes.
Composite Doors
Our composite doors combine durability with advanced security features. Featuring reinforced door panels and insurance-rated hook locking systems, they provide exceptional thermal insulation while maintaining aesthetic appeal. The Solidor range incorporates hardwood timber cores for maximum security, available in over 20 colour options. Each installation includes a ten-year comprehensive guarantee, with customisation options including glazing designs and decorative leadwork. Our doors are designed to withstand extreme weather conditions while maintaining their appearance.
Conservatories
We create year-round usable conservatories using advanced roofing systems. The Ultraframe LivinROOF combines insulated composite panels with glazed sections for optimal thermal performance. Available with optional spotlights and pelmet systems, these structures maintain comfortable temperatures throughout the year. Our installations include 32mm Heatguard polycarbonate and 28mm Activ Blue glass roof options, with traditional cornice solutions for guttering concealment. Every project is completed by our in-house team within 3-4 days.
Orangeries
Our bespoke orangeries transform living spaces with elegant architectural features. Featuring customisable rooflight lanterns in multiple colour options, these extensions incorporate Activ Blue glazing for solar control. Constructed using client-selected materials including stone, each project includes matching windows and doors manufactured to exact specifications. The designs maximise natural light while maintaining thermal efficiency, creating versatile living spaces that seamlessly integrate with existing properties.
Solidor Doors
The premium Solidor composite door range offers unparalleled security and durability. Featuring hardwood timber cores for enhanced strength, these doors incorporate advanced insulation technology to improve energy efficiency. Available in a wide range of finishes including Chartwell Green and Anthracite Grey, they come with multi-point locking systems tested to insurance standards. Each installation includes a ten-year comprehensive guarantee, with customisation options for glazing and decorative elements.
People
Brian
Sales Manager
With extensive experience in the home improvement sector, Brian leads our sales team. He specialises in guiding customers through the selection process, offering expert advice on product specifications and design options. His approach focuses on understanding client needs while ensuring transparent communication throughout the project lifecycle.
Richard
Office Manager
Richard oversees our administrative operations with over 20 years' experience in the industry. He ensures smooth coordination between customers and installation teams, maintaining our high service standards. His role includes managing project timelines and addressing client inquiries with professional efficiency and personal attention to detail.
Questions
What types of windows do you offer?
We offer Kommerling UPVC windows in 44 colour options with multi-point locking systems. Available in various shapes and glazing designs, they feature 5-chamber profiles for improved thermal performance and come with a 25-year colourfast guarantee on white finishes.
Are your doors secure?
All our doors include insurance-rated security features. UPVC doors have hook locks while Solidor composite doors feature hardwood cores. Every installation incorporates multi-point locking systems tested to industry standards for maximum home security.
Do you accept credit card payments?
We no longer accept credit card payments. Our current payment options include cash or bank transfer for your convenience and to maintain competitive pricing.
What areas do you cover?
We primarily serve TS postcodes and surrounding areas across Teesside. For specific locations beyond our standard service area, please contact us to discuss availability and potential additional charges.
What guarantees do you offer?
We provide comprehensive guarantees including a 25-year colourfast warranty on white UPVC products and a ten-year coverage for composite doors. All installations come with an Insurance Backed Guarantee for added peace of mind.
How long does installation take?
Window installations typically complete in one to two days. Conservatories with LivinROOF systems take 3-4 days including plastering. Our team works efficiently while maintaining high standards, with exact timelines confirmed during the quotation process.
