Skip to main content
Minimal Impact

Slimline Secondary Glazing

Ultra-thin profile secondary glazing with minimal visual impact. Perfect for period properties, conservation areas, and where aesthetics are paramount.

Only 20mm Frame Depth
Slimline secondary glazing installation

Slimline Advantages

Combining performance with aesthetics for the most discerning properties

Ultra-Thin Profile

Only 20mm frame depth - the slimmest profile available while maintaining structural integrity and performance.

Minimal Visual Impact

Virtually invisible when closed, preserving the original appearance of your windows and architectural features.

Conservation Approved

Ideal for listed buildings and conservation areas where planning restrictions limit visible alterations.

Period Property Specialist

Perfectly suited to Georgian, Victorian, and Edwardian properties where original character must be preserved.

Full Performance

Despite the slim profile, delivers excellent thermal and acoustic performance comparable to standard systems.

Premium Materials

High-grade aluminum frames with precision engineering for durability and long-term performance.

Profile Comparison

See the difference slimline makes

Standard Secondary Glazing
45mm Frame

More visible, impacts window aesthetics

Recommended
Slimline Secondary Glazing
20mm Frame

Virtually invisible, preserves original appearance

Perfect Applications

Where slimline secondary glazing excels

Heritage Properties
Listed buildings and conservation areas
  • Grade I & II listed buildings
  • Conservation area compliance
  • Historic window preservation
  • Planning permission friendly
Period Properties
Georgian, Victorian, and Edwardian homes
  • Sash window compatibility
  • Original feature preservation
  • Character property enhancement
  • Architectural integrity
Premium Locations
High-end residential areas
  • Mayfair and Belgravia
  • Kensington and Chelsea
  • Hampstead and Highgate
  • Richmond and Barnes
Aesthetic Priorities
Where appearance is paramount
  • Show homes and displays
  • Luxury developments
  • Boutique hotels
  • High-end offices

Performance Specifications

Slim profile, full performance

20mm
Frame Depth

Ultra-slim profile with minimal visual impact on window appearance.

35dB
Noise Reduction

Excellent acoustic performance despite the reduced frame thickness.

60%
Heat Loss Reduction

Significant thermal improvement while maintaining slim aesthetics.

Preserve Your Property's Character

Get slimline secondary glazing that enhances performance without compromising aesthetics.