Business Details
31 Years
experience
Trusted Double Glazing Experts in Romford
Established in 1995, Crystal Windows has built a reputation as a trusted leader in home improvement solutions across the South East of England. With over 90,000 installations completed and a team of 100+ experienced professionals, we specialise in high-quality windows, doors, and energy-efficient systems designed to enhance security, aesthetics, and thermal performance. Our commitment to innovation is reflected in our ISO 9001-certified manufacturing processes and Secured by Design accreditation, ensuring products meet rigorous industry standards. Customer satisfaction remains central to our operations, evidenced by our 98% customer rating and decades of positive testimonials.As a family-owned business with hands-on management, we combine technical expertise with personalised service, offering tailored solutions from initial consultation to after-sales support. Our investment in advanced technologies, such as energy-saving solar PV systems and low-maintenance PVC-U materials, positions us at the forefront of sustainable home improvements. With showrooms in Romford and serving Essex, Kent, Hertfordshire, London, and Surrey, we continue to set benchmarks for quality and reliability in the double glazing industry.
Services
Casement Windows
Sliding Sash Windows
Bay Windows
uPVC Doors
Composite Doors
French Doors
Patio Doors
Bi-Fold Doors
Porches
Insulation
Details
- Year established: 1995
Highlights and features
- 30 years of experience in double glazing with ISO 9001-certified manufacturing
- Secured by Design accredited products for enhanced home security
- Over 90,000 installations completed across the South East of England
- 98% customer satisfaction rating from verified client testimonials
- Comprehensive after-sales support and 10-year product guarantees
Associations and certifications
- ISO 9001
- Secured by Design
- Fensa
What people say
Professional installation teams
Excellent customer communication
Energy bills reduced significantly
High security standards
Minimal disruption during fitting
Services
Casement Windows
Our UPVC casement windows combine modern security features with energy-efficient design. Featuring A+10 rated glass and multi-point locking systems, they reduce heat loss by up to 30% while meeting Secured by Design standards. Customizable in 12+ colours with optional decorative glazing, these windows suit both traditional and contemporary properties. Professional installation ensures minimal disruption and a 10-year guarantee.
Composite Doors
ThermaSecure composite doors feature reinforced GRP skins and 16-layer Kerto cores for superior insulation. Our anti-snap locking systems exceed PAS 24 requirements, providing 5-star security ratings. Available in 8 woodgrain finishes with optional LED letterplates and smart locks, these doors achieve U-values as low as 0.8 W/mK. Installation includes threshold weatherproofing.
Insulation
We offer cavity wall, loft, and external wall insulation solutions meeting Building Regulations Part L. Our Kingspan-certified installers use breathable materials to prevent condensation. Typical installations reduce energy bills by 20% and qualify for ECO4 scheme discounts. All work includes thermal imaging verification and 10-year performance warranties.
Bi-Fold Doors
PVC-U bi-fold systems create seamless indoor-outdoor transitions with 27mm sightlines. Our thermally broken profiles achieve 1.2 W/mK U-values, while compression seals prevent draughts. Available in dual-tone finishes with integrated blinds, these doors feature low-threshold options for accessibility. Installation includes structural calculations and building control notifications.
Porches
Custom-designed UPVC porches enhance property aesthetics while providing weather protection. Our designs incorporate 28mm sealed units with argon gas fillings and reinforced steel frames. Optional features include under-eaves lighting and anti-slip flooring. All installations comply with Document N (safety glazing) and include drainage solutions.
Questions
Do you offer guarantees on your products?
All installations include a 10-year manufacturer's guarantee covering materials and workmanship, with extended warranties available on premium products.
Can I finance my home improvements?
We provide interest-free credit options through FCA-regulated partners, with flexible repayment terms from 12-60 months subject to status.
How do your windows improve energy efficiency?
Our A+10 rated windows use low-emissivity glass and argon-filled chambers to reduce heat loss by up to 35%, lowering annual heating costs.
Are your installers certified professionals?
All engineers hold CSCS accreditation and undergo annual training updates to maintain industry-standard installation practices.
What security features do your doors include?
Composite doors feature anti-drill cylinders, 6-point locking systems, and reinforced frames meeting Secured by Design requirements.
How long does installation take?
Typical window replacements complete within 1-3 days, with full door installations taking 1 day per unit including preparation work.
