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Trusted Double Glazing Solutions in London
Sian Windows is a family-run company rooted in traditional values, dedicated to delivering high-quality double glazing solutions across London and surrounding areas. With decades of combined experience in the industry, we specialise in the supply and installation of domestic windows, doors, conservatories, and roofline products, ensuring every project meets rigorous standards of craftsmanship and durability. Our team of trained operatives utilises advanced materials such as Pilkington glass and Eurocell profiles to provide energy-efficient, secure, and low-maintenance solutions tailored to individual customer needs. Backed by a 10-year insurance-backed guarantee, we prioritise impartial advice, transparent pricing, and exceptional after-sales service.As FENSA-registered installers, we uphold the highest industry standards, ensuring every installation is completed to exacting specifications. Our commitment to customer satisfaction is reflected in our documented after-sales service, employed teams for consistent quality, and a focus on listening to client requirements. We pride ourselves on offering straightforward, obligation-free quotes and delivering value for money, ensuring every customer receives a product that enhances both the aesthetics and functionality of their property.
Services
Double Glazing
UPVC Windows
Sash Windows
Georgian Windows
UPVC Doors
Patio Doors
French Doors
Bi-Folding Doors
Composite Doors
Conservatories
Highlights and features
- Family-run company with traditional values and local expertise.
- Honest advice with no sales gimmicks or pressure tactics.
- Detailed, colour-matched quotations for transparency.
- Documented after-sales service and 10-year insurance-backed guarantee.
- Employed teams ensure consistent quality and first-class finishes.
Associations and certifications
- FENSA
Services
Double Glazing
Our double glazing solutions combine Pilkington glass with advanced sealing technology to enhance thermal efficiency and noise reduction. Each installation is tailored to meet individual property requirements, ensuring long-term durability and security. Backed by a 10-year guarantee, our systems reduce energy bills while maintaining aesthetic appeal for residential properties.
Sash Windows
Modern UPVC sash windows replicate traditional British designs while offering improved functionality. Features include tilt-inwards for easy cleaning, Georgian bars for authenticity, and reinforced frames for security. These low-maintenance windows enhance property value and energy efficiency, ideal for both period and contemporary homes.
Bi-Folding Doors
Our bi-folding doors create seamless transitions between indoor and outdoor spaces with maximum glass panes and minimal frames. Designed for durability and security, they feature multi-point locking systems and thermal insulation. Available in custom configurations to suit modern living spaces and conservatories.
Composite Doors
Composite doors combine high security with aesthetic flexibility, offering resistance to warping, denting, and discolouration. Available in multiple colours and finishes, they feature reinforced cores and advanced locking mechanisms. These doors provide long-term performance with minimal maintenance requirements for residential properties.
Conservatories
Bespoke conservatories are designed to complement existing architecture while maximising natural light. Constructed with thermally efficient materials, they include options like Victorian, Edwardian, and lean-to styles. All installations meet building regulations and come with a 10-year guarantee for structural integrity.
Questions
What types of windows do you supply and install?
We offer UPVC, sash, casement, Georgian, and bi-folding windows with options for double glazing and decorative glass.
Do your services include conservatories?
Yes, we design and install bespoke conservatories in styles like Victorian, Edwardian, and lean-to with thermally efficient materials.
Are your installations FENSA-certified?
All our window and door installations comply with FENSA standards for quality and building regulations.
What guarantees do you offer?
We provide a 10-year insurance-backed guarantee on all installations and product warranties against discolouration or damage.
Do you serve areas outside London?
Yes, we cover surrounding areas beyond London for all window, door, and conservatory installations.
Can you replace existing windows with energy-efficient options?
We specialise in replacing outdated windows with energy-efficient UPVC or aluminium systems to reduce heat loss and noise.
