Designed for Retrofit, Conservation, and High-Performance Environments
The Challenge
- Poor thermal performance in existing glazing
- Noise pollution in urban environments
- Restrictions in listed / heritage buildings
- Cost and disruption of full window replacements
- Traditional upgrades are often invasive, expensive, or restricted
The Solution: Secondary Glazing System
- Installed internally, independent of primary window
- Creates insulating air cavity
- Fully reversible and non-invasive
Perfect for:
- Conservation areas
- Listed buildings
- Retrofit projects
- Urban developments
System Types
We offer Vertical and Horizontal sliders, Lift-out, Fixed, Arched, Tilt & Turn (T&T), and Hinged frame options.
Vertical Sliding System
- Ideal for sash windows
- Maintains traditional aesthetics
- Smooth, balanced operation
Horizontal Sliding System
- Best for wide apertures
- Flexible panel configuration
- Easy access and ventilation
Performance: Thermal Efficiency
Lower U-value = better insulation. Secondary glazing improves EPC ratings and reduces heat loss without façade alteration.
- From 4.7 W/m²K → as low as 1.1 W/m²K
- Meets and exceeds typical retrofit targets (~1.6 W/m²K)
Performance: Acoustic Control
Up to 52 dB noise reduction for quieter interiors, improving comfort levels.
Ideal for schools, offices, and residential homes.
- 6.4mm laminate → residential use
- 8.8mm laminate → urban environments
- 10.8mm laminate → high-noise zones (roads, rail, commercial)
Why Specify Secondary Glazing NI?
- Non-invasive installation: No changes to external façade or primary windows
- Planning-friendly: Ideal for heritage & listed buildings (works with HED)
- Cost-efficient alternative to full window replacement
- Flexible specification: Various glass, frame, fitting, and system options available
Technical Integration
- Typically fitted 50 to 250mm into the reveal depending on noise/heat requirements and building layout
- Independent framing system that does not affect the primary frame
- Compatible with timber, steel, and aluminium primary windows
Considerations
- Air gap optimisation
- Glass specification based on performance targets
- Ventilation strategy
Application Examples
- Heritage buildings
- Residential retrofits
- Offices & commercial spaces
- Education facilities
Why Consider Secondary Glazing NI?
Secondary Glazing NI are specialists across Northern and Southern Ireland, offering:
- Up to 52 dB noise reduction
- Significant thermal improvement
- Heritage compliance
- Cost-effective retrofit solutions
Contact
For more information, request:
- Project-specific specifications
- Detail drawings & samples
- CPD presentation
Website: www.secondaryglazingni.com
Phone: 07720 691214
Email: sales@secondaryglazingni.com
