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Technical Guide

Secondary Glazing Types & Specifications

Complete guide to different secondary glazing systems, their performance characteristics, and ideal applications to help you choose the perfect solution.

Most Popular

Sliding Sash Secondary Glazing

Horizontal sliding panels that match traditional sash windows perfectly. Ideal for period properties requiring ventilation control.

NOISE REDUCTION

70-80%

COST RANGE

£200-£300/m²
Maintains original window character
Good ventilation control
Slightly visible frame

Best for: Period properties, rooms needing ventilation, heritage buildings

Sliding sash secondary glazing installation
Hinged casement secondary glazing
Best Performance

Hinged (Casement) Secondary Glazing

Opens outward or inward like a door, providing excellent access for cleaning and emergency escape routes.

NOISE REDUCTION

75-85%

COST RANGE

£250-£400/m²
Better seal than sliding systems
Can fully open for access
Needs clearance space to swing open

Best for: Easy access requirements, modern homes, maximum noise reduction

Maximum Performance

Fixed (Permanent) Secondary Glazing

Sealed, non-opening panels providing maximum thermal and acoustic performance for extreme conditions.

NOISE REDUCTION

Up to 90%

COST RANGE

£300-£500/m²
Maximum noise and thermal insulation
Slimmest frames (nearly invisible)
No ventilation capability

Best for: Extreme noise areas, basements, rooms not requiring ventilation

Fixed secondary glazing in office corridor
Lift-out secondary glazing system
Seasonal Use

Lift-Out Secondary Glazing

Removable panels perfect for seasonal use and listed buildings requiring temporary solutions.

NOISE REDUCTION

60-70%

COST RANGE

£150-£250/m²
Easy to remove and store
Perfect for seasonal use
Less effective seal (reduced performance)

Best for: Summer/winter flexibility, listed buildings, temporary solutions

DIY Friendly

Magnetic Secondary Glazing

Thin acrylic sheets with magnetic frames - perfect for renters and temporary installations.

NOISE REDUCTION

40-50%

COST RANGE

£50-£100/m²
Cheap and easy to install
Perfect for rental properties
Poor durability and visible seams

Best for: Renters, temporary fixes, DIY projects, budget solutions

Magnetic secondary glazing in bathroom
Vertical sliding secondary glazing
Space Saving

Vertical Sliding Secondary Glazing

Slides vertically like a guillotine window - ideal for narrow spaces and areas beside furniture.

NOISE REDUCTION

65-75%

COST RANGE

£220-£350/m²
Space-saving design
Good for narrow spaces
Less common (harder to source)

Best for: Narrow spaces, areas beside furniture, space-constrained installations

Performance Comparison

Compare all secondary glazing types to find the perfect solution for your needs.

TypeNoise ReductionVentilationAestheticsCost (£/m²)
Sliding Sash70-80%✅ YesGood£200-£300
Hinged Casement75-85%✅ YesModerate£250-£400
Fixed85-90%❌ NoBest£300-£500
Lift-Out60-70%PartialFair£150-£250
Magnetic40-50%❌ NoPoor£50-£100
Vertical Sliding65-75%✅ YesGood£220-£350

Which Type Should You Choose?

Maximum Noise Reduction
Fixed or Hinged systems with acoustic glass for up to 90% noise reduction.
Period Properties
Sliding Sash or Flush-Fit systems to maintain historic character.
Temporary Use
Magnetic or Lift-Out systems for seasonal use and rental properties.
Modern Homes
Hinged or Sliding systems for contemporary properties and easy access.

Need Help Choosing?

Our experts can recommend the perfect secondary glazing type for your specific requirements and budget.