Business Details
38 Years
experience
Premium Windows, Doors & Conservatories in Tewkesbury
Established in 1988, Firmfix Doors & Windows is a family-run business specialising in the manufacture and installation of premium uPVC and aluminium windows, doors, conservatories, and orangeries across the Three Counties. Our commitment to quality is evidenced by our ISO 9001 accreditation and BSI Kitemark certification, ensuring all products meet rigorous standards of thermal efficiency, security, and durability. We employ full-time, salary-paid fitters and an in-house building team to maintain exacting standards throughout every project, from initial design to final installation.Our 10-year guarantee, backed by QANW insurance, provides long-term peace of mind, while our no-pressure sales approach prioritises customer needs over commission-driven targets. With decades of combined experience, we blend traditional craftsmanship with modern technology to deliver tailored solutions that enhance both the functionality and aesthetic appeal of residential properties.
Services
Windows
Doors
Conservatories
Roof Upgrades
Orangeries
Garage Doors
Porches
Carports
Details
- Year established: 1988
Highlights and features
- We have over 35 years of experience in double glazing and conservatory installations.
- Our ISO 9001 accreditation ensures consistent quality across all products and services.
- We employ full-time, salary-paid fitters to maintain installation excellence.
- Our 10-year guarantee is backed by QANW insurance for long-term protection.
- We offer a no-pressure, customer-centric sales approach with expert guidance.
Associations and certifications
- ISO 9001
- BSI Kitemark
- QANW
What people say
Fantastic job
Amazing service
Professional and responsive
Happy experience
Highly recommend
Services
Windows
Our uPVC and aluminium windows combine thermal efficiency with security features like A-rated energy performance and PAS24 compliance. Available in casement, tilt-and-turn, and sash designs, they suit modern and period properties. Customisable colours and finishes ensure seamless integration with any home aesthetic while reducing energy costs.
Doors
We supply and install composite, uPVC, and aluminium doors with enhanced security features including Secure by Design certification. Options include front entrance doors, bi-fold, and patio doors that maximise natural light. Durable, low-maintenance designs improve kerb appeal while providing long-term value through energy efficiency and robust construction.
Conservatories
From lean-to to Edwardian styles, our conservatories create additional living space with year-round usability. Constructed using thermally efficient frames and optional warm roofs, they feature integrated heating, electrical systems, and flooring solutions. Full project management covers planning, building work, and finishing touches like blinds and skirting boards.
Roof Upgrades
Upgrade existing conservatories with insulated warm roofs that reduce noise and improve thermal performance. Our Rehau and Ultraframe systems offer exact colour matching and ventilation options. The process includes replacing glazing with self-cleaning glass or polycarbonate panels, ensuring compliance with modern building regulations while extending the lifespan of your structure.
Orangeries
Combining traditional architectural elements with modern materials, our orangeries provide spacious, light-filled rooms with brickwork bases and glazed roofs. Designed for year-round use, they feature integrated heating, electrical systems, and premium finishes. Full project management ensures seamless construction from initial design to final installation by our in-house team.
Questions
What types of windows do you offer?
We provide uPVC and aluminium windows in casement, tilt-and-turn, bay, bow, and sash styles with A-rated energy efficiency and security features.
Are your installations covered by guarantees?
All installations include a 10-year insurance-backed guarantee through QANW, covering both materials and workmanship.
Do you offer financing options?
Yes, we provide 0% interest finance over 2 years and other credit options subject to status through Novuna Personal Finance.
Can you help with planning permissions?
Yes, we handle all necessary planning permissions and building regulation applications as part of our full-service package.
What areas do you cover?
We serve Cheltenham, Gloucester, Worcester, Tewkesbury, and surrounding areas in the Three Counties region.
How long does a conservatory installation take?
Typical installations take 4-6 weeks from design approval to completion, depending on project complexity and size.
Videos
