Upgrade Your Home with Quality Windows, Doors & Conservatories
© Barriertherm
Barriertherm, experts in double glazing windows, doors and conservatories. Fully Assured Certified, insurance-backed and trusted by homeowners across the region. Quality that lasts. Service that cares.
Barriertherm provides stylish, secure, and energy-efficient windows, doors, and conservatories. Trusted by homeowners across the UK, every product is expertly fitted by our local in-house team and designed to improve your home’s comfort, appearance, and value.
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Barriertherm is a trusted, family-run business with decades of experience in windows, doors, and conservatories. We offer made-to-measure products, expertly fitted by our in-house team and backed by manufacturer warranties and insurance guarantees.
We’re Assure Certified, so you can count on fully compliant installations. With a price match guarantee and a commitment to quality, we’re proud to deliver honest, reliable service from start to finish.
Why Choose Us
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Built to Last
From premium materials to precise installation, our products are designed to perform for years to come.
Certified & Guaranteed
We’re Assure Certified and offer insurance-backed guarantees for complete confidence in our work.
Tailored to You
Every window, door or conservatory is made to measure for your home with no shortcuts or one-size-fits-all solutions.
Family-Run & Local
10-Year Manufacturer Warranties
In-House Fitting Team
Price Match Guarantee
Get a Tailored Quote
We’ll design the perfect solution and give you a fair, transparent quote.
We Supply & Install
Our in-house team takes care of everything quickly, cleanly and professionally.
Request a Free Survey
Fill out our contact form, and we’ll book a convenient time to visit your property.
Assure Accredited
Choosing an Assure certified installer means your windows and doors are legally compliant and meet building regulations. You’ll receive a certificate within 28 days, proving the work is registered with your local authority.
All Assure installers carry branded ID cards and have the required technical qualifications. Plus, you're protected financially if the installer stops trading, giving you complete peace of mind.
Our Services
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uPVC & Composite Door Replacements
Upgrade your home’s security and style with premium uPVC or composite doors. Available in a wide range of colours and finishes, our doors are energy efficient, low maintenance and built to last, perfect for any property type.
Sash & Casement uPVC Windows (Anthracite & White)
Our sash and casement windows combine classic style with modern performance. Choose from sleek anthracite or clean white finishes. These windows are A-rated for energy efficiency, reduce noise, and add real kerb appeal to your home.
uPVC Sliding Patio & French Doors
Open up your living space with smooth-operating sliding patio or elegant French doors. Designed to let in more natural light while improving insulation and security, our doors create a seamless connection between your home and garden.
Internal Conservatory Insulated Warm Roofs
Turn your conservatory into a cosy, year-round room with our insulated warm roof systems. They reduce heat loss in winter, keep things cool in summer, and help lower your energy bills, all while giving your space a fresh, modern feel.
Our Gallery
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I just had my conservatory warm roof installed by Barriertherm. Couldn't be happier. Excellent company, great price.
Lee Kidd
Had my windows replaced recently; all I can say is excellent job and excellent price. Well done, guys.
Connor Mullan
Had a price from them and decided to go ahead. The fitting team was a credit to you, and the work was impressive and without hassle or concerns. I would be happy to recommend it.
Anthony Finnegan
Absolutely over the moon with the work that was carried out on our home. Attention to detail second to none. Will definitely recommend this company.
Carol Rattray
My parents had their windows done off Barriertherm, and they were on point from start to finish. Always on time, kept us in the loop for the entire process, and the job was finished to a very high standard. Any jobs getting done on their house in the future, we will definitely be using this company again.
Michael Mason
We had our conservatory fitted with an insulated ceiling as suggested by Shaun. Michael the fitter did an excellent job, arrived on time, fitted a new light, cleaned up and had the ceiling completed within one and a half days. We have noticed a big difference in the temperature of our conservatory and have been able to sit without any heating on so far. Excellent job; would definitely recommend.
Julie Lawton
Testimonials
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About Us
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How It Works
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Family-Run & Local
10-Year Manufacturer Warranties
In-House Fitting Team
Price Match Guarantee
Supalite Conservatory Roofs
Upgrade your conservatory with a Supalite tiled roof. These lightweight, insulated systems reduce heat loss in winter and glare in summer, making your space comfortable year-round. Available in a variety of styles to suit your home and fully compliant with building regulations.
