Business Details
39 Years
experience
Expert Windows, Doors & Conservatories in Wiltshire
Established in 1987, Thermaglaze Windows & Conservatories has grown into Wiltshire, Dorset, and Somerset's largest independent home enhancement company. With over 37 years of experience, we specialise in high-security, energy-efficient double glazing products, including uPVC and aluminium windows, composite doors, conservatories, and roof replacements. Our commitment to quality is evidenced by our CERTASS accreditation, 10-year product guarantee, and a reputation built on 30,000+ satisfied customers.We pride ourselves on offering no-pressure consultations, free quotations, and a village showroom experience where customers can explore our full product range. Our team of expert installers adheres to strict workmanship codes, ensuring every project meets our exacting standards while maintaining the original character of heritage properties through secondary glazing solutions.
Services
uPVC windows
Aluminium windows
Composite doors
Conservatory installations
Roof replacements
Garage doors
Secondary glazing
Heritage windows
Bi-folding doors
Patio doors
Details
- Year established: 1987
Highlights and features
- 37 years of specialist double glazing expertise since 1987
- CERTASS-approved installations with strict quality control
- 10-year product guarantee on all installations
- Free, no-obligation quotations with expert advice
- Showroom with full product range for informed decisions
Associations and certifications
- CERTASS
What people say
Professional installers
No pressure sales
Excellent craftsmanship
10-year guarantee
Energy-efficient products
Services
uPVC windows
Our uPVC windows combine energy efficiency with low maintenance. Available in casement, sash, and flush designs, they feature slim sightlines and multiple colour options. The thermally efficient profiles reduce heat loss while enhancing property security through multi-point locking systems. Suitable for both modern and traditional homes.
Composite doors
Solidor composite doors offer superior strength with a timber core and weather-resistant outer layers. Customisable with various finishes, glass options, and security features. These doors provide excellent insulation while maintaining aesthetic appeal for period and contemporary properties alike.
Conservatory installations
We create bespoke conservatories using uPVC or aluminium frameworks with energy-efficient glazing. Options include Victorian, Edwardian, and lean-to designs. Our installations feature thermally efficient roofs and bi-folding doors to maximise natural light while maintaining comfortable internal temperatures year-round.
Roof replacements
Upgrade existing conservatories with our insulated solid roof systems. These lightweight composite roofs improve thermal performance while reducing noise from rain and wind. Available in various internal ceiling finishes and external colours to match property aesthetics.
Heritage windows
Aluminium heritage windows replicate traditional timber designs for listed buildings and conservation areas. Slimline profiles with authentic detailing maintain historical accuracy while providing modern benefits like draught-proofing and enhanced security features.
People
David
Founder
Founded Thermaglaze Windows & Conservatories in 1987 with a commitment to quality and customer service. Built the company into a regional leader through strategic acquisitions while maintaining original values of integrity and craftsmanship.
Questions
What window styles do you offer?
We provide uPVC and aluminium windows in casement, sash, flush, and heritage designs with custom colour options.
Do you provide guarantees?
All installations come with a 10-year product guarantee and CERTASS-approved workmanship assurance.
Which areas do you cover?
We serve Wiltshire, Dorset, Somerset, and Bath from our Warminster showroom.
Are your installers certified?
All our installers are CERTASS-approved and follow strict workmanship codes of practice.
Can you replace conservatory roofs?
Yes, we upgrade existing conservatories with thermally efficient solid roof systems.
Do you offer free quotations?
We provide free, no-obligation quotations with no deposit required.
Reviews (2)
Stuart Kellow
Apr 26, 2018
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The staff are excellent, the fitters just got on with the work in a clean tidy and very professional manner throughout the day. I would definitely.
Sam Greenwood
Feb 27, 2018
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Windows installed recently. Excellent customer experience from start to finish. Initial consultation followed up quickly and efficiently, surveyor.
