Slimlite Double Glazing for Period and Listed Properties
Discreet Slimlite double glazing designed for traditional sash windows
When it comes to upgrading sash windows in period or listed properties, finding a glazing solution that delivers energy efficiency without compromising aesthetics can be a challenge. At Cavendish & Cole, we specialise in Slimlite double glazing—an ultra-slim, heritage-approved glazing system ideal for Victorian and Georgian sash windows.
Slimlite is the go-to choice for homeowners, conservation officers, and architects alike. It preserves the appearance of traditional single glazing while offering the comfort, insulation, and efficiency of modern glass technology.
What is Slimlite Double Glazing?
Slimlite is a specially engineered double glazed unit—typically between 10mm and 14mm in total thickness—designed for traditional timber windows where standard double glazing would be too bulky. Each unit contains a narrow cavity filled with insulating gas, allowing it to perform like a modern unit while maintaining the fine sightlines of original sash windows.
Perfect for:
- Listed buildings and homes in conservation areas
- Properties with narrow glazing bars and delicate sash profiles
- Homeowners seeking single to double glazed upgrades
- Those wanting to retain historic joinery while improving efficiency
- Why Choose Slimlite?
- Ultra-slim profile fits into traditional sash frames
- Low-E glass and inert gas fill for thermal performance
- Visually similar to single glazing
- Accepted by many conservation officers and local authorities
- Compatible with timber types like Accoya, hardwood, and softwood
- Reduced heat loss, draughts, and noise
- Helps prevent condensation and improves comfort year-round
Ideal for Upgrades and New Joinery
Whether you’re installing bespoke sash windows from our joinery workshop or looking to upgrade your existing windows with Slimlite double glazing, we tailor each solution to your property and its requirements.We offer:
- Complete new sash windows with Slimlite glazing
- Single to double glazed upgrades using Slimlite in original sashes
- Full repair and restoration of sash boxes, cords, and hardware
- Custom glazing options including obscure, acoustic, and toughened Slimlite glass
Trusted by Heritage Property Owners Across Sussex, Kent & Surrey
Cavendish & Cole is a trusted name in traditional window joinery, known for our sensitivity to heritage and our commitment to lasting quality. From small sash upgrades to full-house installations, we bring a rare combination of period knowledge and technical skill.With every Slimlite project, we ensure:
- Seamless finish with traditional putty glazing
- Careful alignment with English Heritage and planning guidelines
- Full support throughout the process, including planning advice if needed
- Premium materials like Accoya timber and high-grade hardware
- A final result that is warm, quiet, discreet—and made to last
- Bring modern performance to your heritage home.
Ready to transform your home? Call us on 01273 282176 or email us here
Get in touch today for a free consultation. Let’s bring your vision to life—beautifully, traditionally, and made to last.Get In Touch
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Contact Us
- Brighton, East Sussex
- info@cavendishcole.co.uk
- 01273 282176
Cavendish & Cole
Additional Services
At Cavendish & Cole Timber Sash Windows & Doors, we specialise in the design, manufacture, and installation of beautiful bespoke sash windows,
Using ultra-thin Slimlite units, our double glazed sash windows maintain the narrow sightlines and slender glazing bars characteristic of Georgian and Victorian sash windows
Whether you live in a listed building, conservation area, or a cherished Victorian or Georgian home, our discreet upgrade solutions deliver the warmth and comfort of modern double glazing, without altering the heritage aesthetics that make your home unique.
Discreet double glazing designed for traditional sash windows When it comes to upgrading sash windows in period or listed properties, finding a glazing solution that delivers energy efficiency without compromising aesthetics can be a challenge.
All our glazing is selected for quality, energy efficiency, and visual compatibility with period-style joinery. We work closely with homeowners, architects, and conservation officers
Living in a bustling town, near a main road, or under a flight path doesn’t mean you have to sacrifice peace and quiet—nor the classic style of your sash windows.
Privacy glazing is a common requirement in bathrooms, cloakrooms, and entryways—but standard modern options often look out of place in traditional homes. That’s why we source a range of authentic obscured and patterned glass styles that work in harmony with Georgian, Victorian, and Edwardian architecture.
If you're renovating a period home or looking into sash window repairs or replacements, you’ll quickly come across a number of technical terms — some of which can sound confusing at first.