Build Your Own Door
CGW Installations

CGW Installations

Coventry & Warwickshire’s Rockdoor Trusted Installer, Glazing, Bifold & Sealant application specialists

Rockdoor, composite door, bifold, glazing and professional silicone sealant services across Coventry, Warwickshire and surrounding areas. All installations are completed by an NVQ-qualified carpenter with more than 25 years’ experience, with Certass certification and insurance-backed guarantees available where applicable.

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5.0/5Average Review Score (120 reviews)

120 Five-Star Reviews

Trustpilot
“Great service from the beginning to the end. Highly recommend”— Trustpilot
Experienced, accredited glazing and door specialists

ABOUT US

Experienced, accredited glazing and door specialists

With over 25 years’ experience in the building industry, CGW Installations provides specialist Rockdoor fitting, window replacement and silicone sealant services, with reliable, owner-led workmanship from start to finish.

  • Over 25 years' hands-on building experience
  • Rockdoor-accredited installer with applicable 10-year Rockdoor warranty
  • NVQ-qualified carpenter
  • Public liability cover up to £5 million
  • Insurance backed guarantee and building compliance certification provided post installation
Learn More About Us

Services

Our Services

Specialist door, glazing and sealant services

01

Rockdoor Installation

Supply and professional installation of Rockdoor composite doors across Warwickshire. Accurate on site survey, comprehensive discussion on all options available, order processing, certified installation, insurance backed guarantee and 10 year manufacturer warranty. 
02

Rockdoor Repairs and Maintenance

Professional Rockdoor repairs and maintenance across Warwickshire, Coventry and Leamington Spa. Reliable adjustments, lock repairs, seal replacements and servicing.
03

Composite Door Installation

Professional composite door installation across Warwickshire, Coventry and Leamington Spa. Secure, energy efficient doors supplied and expertly fitted.
04

Silicone Sealant Application

Trade-grade silicone sealing for new builds, extensions and bathrooms — internal or external. Precision joint preparation and finishing to deliver durable, watertight seals that stand up to movement and moisture.
05

Bifold Door Installation

Supply and install high-performance bifold doors across Warwickshire. On-site surveys, manufacturer liaison and precision installation by an NVQ-qualified carpenter with 25 years' experience.
06

Glass Replacement

Replacement of broken or failed glazing units across Warwickshire — single panes, sealed double-glazed units and safety glass fitted with trade‑grade seals and a neat finish.
07

Individual Window Installation

One-off window replacement or single-unit installation across Warwickshire. Precision measuring, supply and fit — finished, sealed and signed off by a qualified carpenter.

Build Your Own Rockdoor

Choosing a new Rockdoor is a big decision — so we've made it easy. Use our interactive 3D door designer to explore styles, colours, glazing options and hardware until you find the combination that's right for your home. It only takes a few minutes, and once you're happy with your design, get in touch and we'll take it from there.

Design Your Door
Our team at work

WHY CHOOSE US

Why Choose Us

Manufacturer-accredited Rockdoor installs

Rockdoor Trusted Installer: trained, assessed and accredited as a trusted installer with the UK’s top composite door manufacturer, ensuring a 5 star installation preserving the 10 year Rockdoor warranty.

Carpentry-led craftsmanship

Owner is an NVQ-qualified carpenter who fits doors and windows with joinery accuracy — square, sealed and draught-free. No bodges, just a trade-standard finish. The same level of workmanship is applied across all installations including bifolds, windows and composite doors.

Clear communication throughout

We keep you updated every step of the way with clear communication, confirmed dates, and ongoing support to ensure a smooth and stress free experience.

Robust insurance & practical guarantees

All door and window installations are fully insured and backed by insurance backed guarantees, with certified building compliance and complete public liability cover for added peace of mind.

Local to Warwickshire — reliable site service

Rapid survey scheduling from first point of contact. Practical scheduling of work to suit you and your home.

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REVIEWS

What Our Customers Say

“Great service from the beginning to the end. Highly recommend”

— Maiko Saito

TrustpilotTrustpilot2026-07-13
“Excellent service as usual. Quick response to query. Timely installation date.”

— Karen Harper

TrustpilotTrustpilot2026-07-13
“Wes is very reliable, works hard and does an excellent job. He is proud of his work and takes the time to make sure everything is done correctly. He is a pleasure to work with.”

— Gallimore

TrustpilotTrustpilot2026-07-13
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OUR ACCREDITATIONS

Rockdoor Trusted Installer
NVQs
QANW
Certass Certified Installer
Certass Competent

Arrange a no‑obligation site survey

Get a straightforward survey and written recommendation from an experienced installer. Technical advice, clear timescales and a documented scope of works — organised around your schedule.
Arrange a Site Survey
CGW Installations | Doors, Windows & Glazing