Georgian Windows Secondary Glazing
Expert secondary glazing for Georgian windows and period properties. Preserve authentic character while achieving modern thermal efficiency and noise reduction standards.
Understanding Georgian Window Design
The distinctive features that define Georgian architecture
Distinctive 6-over-6, 8-over-8, or 12-over-12 pane configurations with thick glazing bars creating geometric patterns.
Traditional counterweight systems with sash cords and pulleys allowing smooth vertical sliding operation.
Original crown glass with characteristic imperfections and optical qualities that add to the authentic Georgian appearance.
Classical proportions with tall, narrow windows that create the distinctive Georgian facade symmetry.
Georgian Window Performance Challenges
Common issues with 18th and early 19th century windows
Thermal Performance Issues
Single Glazing Heat Loss
Original crown glass provides minimal thermal insulation, leading to significant heat loss
Multiple Glazing Bar Gaps
Numerous glazing bars create multiple potential air leakage points around each pane
Aged Putty and Seals
Historic putty and sealing compounds deteriorate over time, creating drafts and air infiltration
Sash Movement Issues
Worn sash cords and aged timber frames allow movement and rattling in windy conditions
Secondary Glazing Benefits
Preserves Glazing Bar Character
Maintains the distinctive Georgian glazing bar patterns and proportions completely intact
65% Heat Loss Reduction
Creates effective thermal barrier while preserving original crown glass and window operation
Eliminates Drafts
Seals all air leakage points while maintaining the ability to operate original sash windows
No Planning Permission
Internal installation means no alterations to the Georgian facade or planning applications
Georgian Window Configurations
Secondary glazing solutions for different Georgian styles
Characteristics:
- • 12-over-12 or 9-over-9 pane configurations
- • Thick glazing bars (20-25mm)
- • Small crown glass panes
- • Deep window reveals
Secondary Glazing Solution:
Hinged or vertical sliding systems that accommodate the complex glazing bar patterns while providing excellent thermal performance.
Characteristics:
- • 8-over-8 or 6-over-6 pane layouts
- • Refined glazing bar proportions
- • Larger glass panes
- • Classical proportions
Secondary Glazing Solution:
Vertical sliding secondary glazing that mirrors the original sash operation while maintaining the elegant Georgian proportions.
Characteristics:
- • 6-over-6 or 4-over-4 configurations
- • Slimmer glazing bars
- • Improved glass quality
- • Transitioning to Victorian style
Secondary Glazing Solution:
Flexible systems including hinged, sliding, or combination approaches depending on window size and usage requirements.
Characteristics:
- • Curved or angled bay configurations
- • Multiple sash windows
- • Complex glazing bar arrangements
- • Architectural focal points
Secondary Glazing Solution:
Custom angled frames with combination opening systems that follow the bay window geometry while preserving the Georgian character.
Georgian Townhouse Case Study
Transforming a Grade II listed Georgian property
Property Details
- Property: 1760s Georgian townhouse, Bloomsbury
- Listing: Grade II listed building
- Windows: 16 original 8-over-8 sash windows
- Challenge: High energy bills, street noise
- Constraints: Must preserve glazing bars
Solution Implemented
- • Vertical sliding secondary glazing
- • 6.4mm laminated acoustic glass
- • Slim 18mm aluminum frames
- • Balanced weight operation
- • Installation completed in 3 days
Outstanding Results
Energy Performance
Annual heating costs reduced from £2,400 to £1,400 - saving £1,000 per year
Acoustic Improvement
Street noise reduced from 68dB to 38dB - creating peaceful Georgian elegance
Heritage Preservation
All original glazing bars and crown glass preserved - conservation officer approved
Property Value
Improved EPC rating and enhanced desirability - estimated 3% value increase
Enhance Your Georgian Windows
Get expert advice on secondary glazing solutions that preserve the authentic character of your Georgian windows while dramatically improving performance.