Secondary Glazing Case Studies

Property Type

Victorian 3-bed terrace

The Problem

Severe traffic noise from main road, high energy bills, and draughty original sash windows in conservation area.

The Solution

Installed acoustic secondary glazing on all street-facing windows (6 windows total). Used slim-profile aluminium frames to maintain period aesthetics.

Results

• Noise reduction of 38dB - transformed living conditions
• Energy bills reduced by £780/year (28% saving)
• No planning permission required
• Completed in 2 days with minimal disruption
• Original sash windows preserved

Property Type

Grade A listed Georgian townhouse

The Problem

Listed building restrictions prevented replacement windows. Poor thermal performance causing condensation and high heating costs.

The Solution

Heritage-approved secondary glazing using traditional timber frames matched to existing Georgian proportions. Low-E glass for thermal efficiency.

Results

• Listed building consent approved first time
• U-value improved from 5.8 to 1.8 W/m²K
• Eliminated condensation completely
• Heating costs reduced by 35% (£920/year)
• Period character fully maintained

Property Type

2-bed modern apartment

The Problem

Flight path noise making bedrooms unusable during day. Existing double glazing insufficient for aircraft noise.

The Solution

Specialist acoustic secondary glazing with laminated glass in bedrooms. Horizontal sliding system for easy operation.

Results

• Aircraft noise reduced by 42dB
• Bedrooms now usable 24/7
• Property value increased by £15,000
• Improved sleep quality for residents
• Sleek modern appearance maintained

Property Type

17th century stone cottage

The Problem

Extreme draughts through original leaded windows. Uncomfortable in winter despite high heating costs. Windows too valuable to replace.

The Solution

Bespoke magnetic secondary glazing to fit irregular window openings. Easy removal for summer months. Traditional appearance.

Results

• Draughts eliminated completely
• Room temperatures increased by 4°C average
• Heating oil consumption reduced 40%
• Annual saving of £1,100
• Original leaded windows protected

Property Type

Victorian 2-bed terrace

The Problem

Street noise, cold bedrooms, and single-glazed windows in poor condition. Limited budget for improvements.

The Solution

Budget-friendly acrylic secondary glazing on bedroom windows. Aluminium frames with simple fixed design to minimize costs.

Results

• Noise levels reduced by 25dB
• Bedroom comfort significantly improved
• £340/year energy savings
• DIY-friendly maintenance
• 2-year payback period

Property Type

Converted office to 4-bed house

The Problem

Large commercial-style windows causing excessive heat loss. Modern appearance required. Planning restrictions on external changes.

The Solution

Slim aluminium secondary glazing with argon-filled cavity. Contemporary styling to match modern interior design.

Results

• EPC rating improved from D to B
• Commercial heating bills reduced by 45%
• Modern aesthetic achieved
• Completed during occupation
• No external alterations required