Business Details
38 Years
experience
Your Trusted Local Supplier of Windows, Doors & Conservatories in Tewkesbury
Established in 1988, Firmfix Doors & Windows has built a reputation as a trusted family-run business specialising in the manufacture and installation of high-quality windows, doors, conservatories, and related products across the Three Counties. Our commitment to excellence is reflected in our ISO 9001 accreditation, BSI Kitemark compliance, and a 10-year insurance-backed guarantee supported by QANW. We employ full-time, salary-paid fitters and an in-house building team to ensure every project meets exacting standards, from initial design to final installation.Customer satisfaction remains our priority, with a no-pressure sales approach and a focus on delivering durable, energy-efficient solutions tailored to individual needs. Our product range includes uPVC, aluminium, and composite options, all manufactured in the UK using premium components. With decades of experience and a dedication to innovation, we combine traditional craftsmanship with modern technology to provide spaces that enhance homes and lifestyles.
Services
uPVC Windows
Composite Doors
Conservatories
Roof Upgrades
Aluminium Windows
Bi-Fold Doors
Garage Doors
Porches
Orangeries
Condensation Reduction
Details
- Year established: 1988
Highlights and features
- We are a family-run business with over 35 years of local expertise.
- Our full-time, salary-paid fitters ensure consistent quality and reliability.
- All installations come with a 10-year insurance-backed guarantee.
- We offer a no-pressure, customer-focused sales approach.
- Our products meet ISO 9001 and BSI Kitemark quality standards.
Associations and certifications
- ISO 9001
- QANW
What people say
Fantastic job
Amazing service
Friendly and responsive
No pressure approach
Highly recommend
Services
uPVC Windows
Our uPVC windows combine energy efficiency with robust security, available in casement, flush, tilt-and-turn, and sash designs. A-rated as standard, they reduce energy bills while maintaining aesthetic appeal. Customisable in multiple colours and finishes, they suit both modern and traditional properties.
Composite Doors
High-security composite doors offer superior insulation and durability, available in various styles and colours. Reinforced with PAS24 and Secure by Design certifications, they enhance home security while adding curb appeal. Customisable with hardware and glazing options for a tailored finish.
Conservatories
From lean-to to Edwardian styles, our conservatories create versatile living spaces. Built with thermally efficient materials and optional upgrades like warm roofs, they provide year-round comfort. Full-service installation includes foundations, electrics, and flooring.
Roof Upgrades
Upgrade existing conservatory roofs with our insulated warm roof system, reducing noise and improving thermal efficiency. Available in Rehau or Ultraframe systems, they transform outdated spaces into comfortable, energy-efficient rooms with up to 20% off during seasonal promotions.
Aluminium Windows
Origin Global aluminium windows offer slim frames and modern aesthetics, available in OW-70 or OW-80 profiles. Thermally efficient and low-maintenance, they suit contemporary homes. Secure by Design certified for enhanced safety without compromising style.
Questions
What areas do Firmfix serve?
We cover Cheltenham, Gloucester, Worcester, Tewkesbury, and surrounding areas in the Three Counties.
Do your installations come with a guarantee?
Yes, all work includes a 10-year insurance-backed guarantee through QANW.
Can I finance my home improvement project?
Yes, subject to status, we offer 0% interest over 2 years via Novuna Personal Finance.
Are your products energy efficient?
All windows and doors are A-rated as standard, meeting strict thermal efficiency standards.
Do you handle planning permissions?
Yes, we manage planning applications and building regulations for conservatory installations.
What materials do you use?
We use uPVC, composite, and aluminium materials from trusted UK manufacturers like Origin Global.
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