Business Details
19 Years
experience
Premium Slimlite Double Glazing Solutions
Established in 2007, Sash Glass specialises in supplying Slimlite double glazed units for sash windows, addressing the challenge of complying with thermal insulation regulations while preserving the aesthetic integrity of period properties. Our expertise stems from decades of hands-on experience in sash window renovation, including restoring 13 sash windows in a 1990 London property and adapting to coastal corrosion challenges in Deal. We acted as early adopters of Slimlite technology, becoming its largest customer after demonstrating its effectiveness in meeting Document L regulations. Our commitment to quality is evidenced by BS EN 1279 compliance, a 10-year manufacturer's guarantee, and a patented production process.With nationwide delivery and direct support for trade professionals, we offer technical guidance, competitive pricing, and conservation-compliant solutions. Our Ultra Clear self-cleaning glass variant balances energy efficiency with visual clarity, achieving 85% visible light transmission. Through partnerships with architects and builders, we've supplied over 12,000 units annually while maintaining industry leadership in discreet double glazing innovation. Our team combines practical experience with regulatory expertise to help clients achieve thermal compliance without compromising architectural heritage.
Services
Slimlite Double Glazing
Reproduction Crown Glass
Toughened Glass Units
Self-Cleaning Glass
Ultra Clear Glass
Glazing Bar Fitting
Conservation Compliance
Thermal Insulation
Window Restoration
Trade Supply
Details
- Year established: 2007
Highlights and features
- We pioneered Slimlite adoption in 2007 after 20 years' experience restoring sash windows
- Units carry a 10-year manufacturer's guarantee and BS EN 1279 compliance certification
- Patented technology enables fitting within 7mm glazing rebates without frame modification
- Ultra Clear glass maintains 85% light transmission while meeting Document L regulations
- Specialist conservation solutions approved for listed buildings and conservation areas
Associations and certifications
- BS EN 1279
- UK Patent
What people say
Quiet and cosiness
Look just like ordinary glass
Builder very impressed
Immediate temperature difference
Seamless conservation compliance
Services
Slimlite Double Glazing
Slimlite units provide energy-efficient double glazing specifically designed for sash windows. The ultra-thin profile maintains traditional aesthetics while improving thermal performance. With 5mm perimeter seals, these units fit existing 7mm glazing rebates without requiring frame modifications, making them suitable for both new and renovation projects. Their warm edge technology and argon gas fill enhance insulation values to meet current building regulations.
Conservation Compliance
Specialist glazing solutions for listed buildings and conservation areas. Our units maintain historical accuracy while improving energy efficiency. Slimlite's discreet profile (5mm sightline) matches original glazing bars exactly. The self-cleaning coating and Ultra Clear option preserve visual clarity without the tinted effect of standard low-E glass, ensuring compliance with heritage regulations while reducing maintenance needs.
Ultra Clear Glass
Ultra Clear self-cleaning glass eliminates the greenish tint found in standard low-E glass while maintaining thermal performance. With 85% visible light transmission compared to 75% in standard units, it preserves natural daylight quality. The hydrophilic coating breaks down organic dirt when exposed to UV light, reducing manual cleaning requirements while maintaining optical clarity.
Reproduction Crown Glass
Authentic replication of traditional crown glass for heritage projects. This handcrafted glass recreates the subtle ripples and imperfections of 17th-19th century glass while maintaining modern safety standards. Available in various thicknesses and finishes, including satin and patterned options, it allows precise matching of original window characteristics in period properties.
Trade Support Service
Comprehensive service for joiners, builders, and conservation specialists. Includes technical guidance on installation, compliance certification, and fast order processing. Our team provides detailed specifications, glazing instructions, and on-site advice to ensure correct fitting. We maintain stock of standard sizes while offering custom manufacturing to meet specific project requirements.
Questions
What are Slimlite double glazed units?
Slimlite units are ultra-thin double glazing solutions designed specifically for sash windows, allowing thermal improvement without modifying original frames. They meet current building regulations while maintaining traditional aesthetics.
How do Slimlite units comply with building regulations?
Slimlite meets Document L England requirements with U-values below 1.6 for refurbished windows. Their warm edge technology, low-E coating, and argon gas fill provide thermal performance equivalent to standard double glazing in a much slimmer profile.
Can Slimlite be used in listed buildings?
Yes - Slimlite's discreet 5mm sightline and authentic appearance allow installation in listed properties without altering window character. The units have been featured in multiple conservation projects and received approval from heritage bodies.
How are Slimlite units installed?
They fit existing single-glazed rebates without frame modifications. Standard installation requires 7mm minimum rebate depth. Detailed glazing instructions are available for trade professionals, with support available via phone or email for any technical queries.
What guarantee applies to Slimlite units?
Double glazed units carry a 10-year manufacturer's guarantee against failure. All units are BS EN 1279 compliant and produced under strict quality controls to ensure long-term performance in various environmental conditions.
What special glass options are available?
Options include Ultra Clear low-iron glass with 85% light transmission, self-cleaning coating, satin finish, and patterned glass. Reproduction crown glass is available for heritage projects, with toughened options for safety glazing requirements.
