Business Details
36 Years
experience
Trusted Window Contractors in London | SashCo
Established in 1990, SashCo is a family-run window specialist serving London and the South East. We pride ourselves on combining traditional craftsmanship with modern solutions, offering a comprehensive range of services from sash window repairs to bespoke installations in wood, UPVC, aluminium, and Crittall. Our team conducts thorough surveys before providing transparent quotes, ensuring clients make informed decisions tailored to their property's style and needs. With over three decades of experience, we maintain close partnerships with manufacturers to deliver high-quality products that meet current building regulations. We prioritise customer education, helping clients distinguish between necessary replacements and viable repairs.Our commitment to excellence extends to energy-efficient solutions, including double and triple-glazed windows that balance thermal performance with cost-effectiveness. We offer free consultations within a 5-mile radius, reflecting our dedication to accessible, client-focused service. Our joinery expertise ensures all installations harmonise with architectural styles, particularly in conservation areas. We also cater to trade clients with direct manufacturer pricing and large-order discounts. Every project, whether self-installed or professionally fitted, receives the same rigorous attention to detail and compliance standards.
Services
UPVC Sash Windows
Double Glazed Windows
Triple Glazed Windows
Bespoke Sash Windows
Window Repairs
Details
- Year established: 1990
Highlights and features
- Family-run business with 34 years of specialist window experience
- Comprehensive surveys and transparent, obligation-free quotes
- Free local consultations within a 5-mile radius
- Bespoke solutions matching period architectural styles
- Energy-efficient double and triple-glazed options available
Associations and certifications
- FENSA
What people say
Extremely professional
Very happy with new windows
Good experience
No hidden fees
Expert advice
Services
UPVC SashCo Windows
Our UPVC sash windows combine traditional aesthetics with modern durability. Featuring low-maintenance profiles, tilt-open functionality for easy cleaning, and optional decorative horns, these windows replicate classic sash designs while offering enhanced thermal efficiency. Bespoke balance mechanisms ensure smooth operation, with choices of astrical or Georgian bars for authentic period detailing.
Double Glazed Windows
Double glazed windows reduce heat loss by up to 94% compared to single glazing, improving energy efficiency while maintaining lighter weight. These units meet current Building Regulations with U-values no worse than 1.6, harnessing solar energy effectively. They provide excellent thermal performance at a cost-effective price point for most residential properties.
Triple Glazed Windows
Triple glazed windows offer superior energy efficiency with the lowest U-values available, reducing heat loss further than double glazing. They provide enhanced acoustic insulation, improved security due to increased strength, and long-term durability. While heavier and more expensive initially, their thermal savings over twenty years make them a cost-effective choice for energy-conscious clients.
Bespoke SashCo Windows
Crafted to exact specifications, our bespoke sash windows match unique architectural styles, particularly in conservation areas. Available in hardwood or softwood, these made-to-measure units adhere to building regulations while preserving historical accuracy. We create custom mouldings to replicate existing window designs with precision.
Window Repairs
We specialise in repairing and refurbishing existing windows, extending their lifespan by decades. Our services include sash window restoration, draught-proofing, and hardware replacement. This cost-effective alternative to full replacement maintains property character while improving functionality and energy efficiency through targeted upgrades.
Questions
Do you offer window repairs as well as replacements?
Yes, we specialise in both window repairs and full replacements, often extending the life of existing sash windows through professional refurbishment.
What areas do you cover?
We serve London, Surrey, and Kent, providing both supply and installation services across residential and commercial properties in these regions.
Can I get a free consultation?
We offer free window consultations within a 5-mile radius of our Keston base, including on-site measurements and tailored recommendations.
Are your windows energy efficient?
All our windows meet current energy efficiency standards, with double and triple-glazed options available to improve thermal performance and reduce energy costs.
Do you work with trade customers?
Yes, we supply trade clients directly from manufacturers with competitive pricing, large-order discounts, and nationwide delivery options.
Are your installers accredited?
Our installations comply with building regulations, and we can arrange certification through FENSA registered fitters or building control inspections as required.
