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28mm Triple Glazing

28mm overall thicknessFrom 0.8 W/m²K

28mm triple glazed units pack three panes of glass into the same depth as most double glazed units — perfect for upgrading existing frames without modification. You get noticeably better thermal and acoustic performance without replacing your window frames.

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38 products

Triple glazed insulated glass unit showing three panes, spacer bars and sealed cavities
Commercial Triple Glazed Unit - High Traffic – 6mm Softcoat / Aluminium / Argon / 77% Thermal
£0.00
6wk
Triple glazed insulated glass unit showing three panes, spacer bars and sealed cavities
Acoustic Triple Glazed Unit - 44dB Noise Reduction – 6.4mm Softcoat Lam / Warm-Edge / Argon / 87% Thermal
£0.00
6wk
Triple glazed insulated glass unit showing three panes, spacer bars and sealed cavities
Acoustic Triple Glazed Unit - 44dB Noise Reduction – 6.4mm Softcoat Lam / Warm-Edge / Argon / 83% Thermal
£0.00
4wk
Triple glazed insulated glass unit showing three panes, spacer bars and sealed cavities
28mm Triple Glazed Unit - Energy A+ Rated – 6mm Planitherm 1.0 / Warm-Edge / Argon / 84% Thermal
£0.00
5wk 0
A+ rated triple glazing with low-E coating
Triple glazed insulated glass unit showing three panes, spacer bars and sealed cavities
28mm Triple Glazed Unit - Energy A+ Rated – 4mm Softcoat / Aluminium / Argon / 80% Thermal
£0.00
4wk 0
A+ rated triple glazing with low-E coating
Triple glazed insulated glass unit showing three panes, spacer bars and sealed cavities
28mm Triple Glazed Unit - Energy A+ Rated – 6mm Planitherm 1.0 / Warm-Edge / Argon / 79% Thermal
£0.00
4wk 0
A+ rated triple glazing with low-E coating
Triple glazed insulated glass unit showing three panes, spacer bars and sealed cavities
28mm Triple Glazed Unit - Energy A+ Rated – 4mm Softcoat / Aluminium / Argon / 90% Thermal
£0.00
3wk 0
A+ rated triple glazing with low-E coating
Triple glazed insulated glass unit showing three panes, spacer bars and sealed cavities
Triple Glazed Window Unit - Standard – 4mm Softcoat / Warm-Edge / Argon / 88% Thermal
£0.00
4wk
Triple Glazed Door Unit - Secure – 6mm Softcoat / Warm-Edge / Argon / 84% Thermal / Seamed
£0.00
3wk
Triple glazed insulated glass unit showing three panes, spacer bars and sealed cavities
Triple Glazed Door Unit - Secure – 10mm Softcoat / Warm-Edge / Argon / 83% Thermal
£0.00
6wk
Triple glazed insulated glass unit showing three panes, spacer bars and sealed cavities
Commercial Triple Glazed Unit - High Traffic (Commercial / Shopfront)
From £200.00
5wk
Triple glazed insulated glass unit showing three panes, spacer bars and sealed cavities
Acoustic Triple Glazed Unit - 44dB Noise Reduction (Roof / Overhead Glazing)
From £200.00
4wk
Triple glazed insulated glass unit showing three panes, spacer bars and sealed cavities
28mm Triple Glazed Unit - Energy A+ Rated (Conservation Area)
From £200.00
6wk 0
A+ rated triple glazing with low-E coating
Triple glazed insulated glass unit showing three panes, spacer bars and sealed cavities
28mm Triple Glazed Unit - Energy A+ Rated (Commercial / Shopfront)
From £200.00
6wk 0
A+ rated triple glazing with low-E coating
Triple glazed insulated glass unit showing three panes, spacer bars and sealed cavities
28mm Triple Glazed Unit - Energy A+ Rated (New Build / Extension)
From £200.00
5wk 0
A+ rated triple glazing with low-E coating
Triple glazed insulated glass unit showing three panes, spacer bars and sealed cavities
28mm Triple Glazed Unit - Energy A+ Rated (Residential Replacement)
From £200.00
6wk 0
A+ rated 28mm triple glazing with low-E coating

About 28mm Triple Glazing

28mm triple glazing represents the thinnest available triple glazed sealed unit configuration, typically featuring 4mm-6mm-4mm-6mm-4mm glass with 6mm spacer bars. This compact design allows retrofitting into existing double-glazing frames without structural modifications, making it ideal for upgrading thermal performance in heritage or standard window systems.

Each made to measure unit incorporates Low-E coating and argon gas fills to achieve U-values as low as 0.8 W/m²K, significantly improving energy efficiency over standard double glazing. All units comply with BS EN 1279 standards and feature warm edge spacers to minimise thermal bridging and condensation risks.

Pane Relief manufactures every 28mm triple glazed unit to your exact specifications, with comprehensive quality guarantees and nationwide UK delivery. Our expert glazing team ensures precise measurement guidance and professional technical support throughout your order.

Frequently Asked Questions

  • What glass configuration is used in 28mm triple glazing?
    Typically 4mm-6mm-4mm-6mm-4mm with two 6mm cavities, though variations like 4mm-5mm-4mm-5mm-4mm are available depending on specific thermal performance requirements and frame compatibility.
  • What U-value can I expect from 28mm triple glazing?
    Standard 28mm triple glazed units with Low-E coating and argon gas achieve U-values between 0.8-1.0 W/m²K, representing a significant improvement over typical double glazing at 2.8 W/m²K.
  • Will 28mm triple glazing fit my existing double-glazed frames?
    Yes, 28mm triple glazing is specifically designed to retrofit most standard double-glazing frames, though we recommend checking your glazing rebate depth and providing exact measurements for compatibility confirmation.
  • How do I order made to measure 28mm triple glazing?
    Measure your existing glass width and height to the nearest millimetre, then contact our team with dimensions and any specific requirements. We provide measurement guidance and technical support throughout the ordering process.

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