Secondary Glazing - Combination Units

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Low Lying Flat Roof

High Security Locking • Slim Sightlines • Enhanced Thermal Performance

SYSTEM OPTIONS

Combination Secondary Glazing Systems

Combination secondary glazing units allow lift out and hinged sections to be combined within a single outerframe, making it easier to match existing window layouts while keeping installation neat, efficient and visually well aligned.

Economy Odd Leg Combination Secondary Glazing

Face Fix Only

Economy Odd Leg System

A practical and cost-effective combination unit system designed for quick installation where a simple face fixed solution is required.

Operation: Combination Unit Fixing: Face Fix Frame: Economy Odd Leg

Combines lift out and hinged units within one outerframe.
Designed to help copy existing window layouts more closely.
Quick and easy to install.
Our most affordable combination unit system.

Luxury Subframe Combination Secondary Glazing

Face Fix / Reveal Fix

Luxury Subframe System

A cleaner, more finished combination unit system with trims and subframe detailing, ideal where appearance is just as important as function.

Operation: Combination Unit Fixing: Face Fix / Reveal Fix Frame: Luxury Subframe

Combines lift out and hinged units in one coordinated frame.
Helps create slimmer sightlines and easier alignment to the prime window.
Suitable where a more refined, traditional finish is preferred.
Well suited to more detailed domestic and heritage-style installations.

GLASS OPTIONS

Secondary Glazing Glass Specification

A range of glass options designed to improve thermal performance, sound insulation, safety and privacy depending on your project requirements.

Glass Type	Thickness	Best For	Key Benefits
Float Glass (Annealed)	4mm	Standard use	Good improvement in sound and thermal insulation
Obscure / Patterned Glass	4mm	Privacy areas	Maintains light while increasing privacy (bathrooms, bedrooms)
Toughened Glass	4mm	Safety glazing	Increased strength and security over standard float glass
Float Glass (Annealed)	6mm	Larger panels	Improved sound & thermal performance with greater strength
Toughened Glass	6mm	Safety + larger sizes	Stronger glass with added safety and security
Laminated Safety Glass	6.4mm	Security & insulation	High safety performance with improved sound and thermal insulation
Acoustic Glass	6.8mm	Noise reduction	Significant improvement in sound insulation
Double Glazed Unit	20mm	Maximum performance	Extreme thermal and acoustic performance (Heavy Duty system only)

COLOUR OPTIONS

Frame Finishes

Available in a selection of standard finishes, or any RAL colour to suit your project.

HIPCA White KL9910 Semi-Gloss

Van Dyke Brown BS08B29 Gloss

Silver Anodised Finish

Any RAL Colour

Choose from over 200 RAL colours for a fully bespoke finish. RAL finishes are special order and may extend lead times.

View RAL Chart

TECHNICAL DETAILS

Combination Secondary Glazing Technical

Technical guidance for our combination secondary glazing units, designed to combine hinged and lift out sections within one outerframe while maintaining clean sightlines and a practical, made-to-measure layout.

Specification Summary

Overview

Operation: Combination Unit
Formats: Hinged + Lift Out
Frame Options: Economy / Luxury
Applications: Domestic / Commercial

Best Suited To

Applications

Prime Use: Existing Combination Windows
Noise Reduction: Yes
Draught Reduction: Yes
Thermal Insulation: Yes

Frame System Options

Available

Economy Odd Leg: Available
Luxury Subframe: Available
Technical Drawings: Downloadable
Glass Safety: BS 6262 Part 4

Suitable Applications

Combination units are ideal where the new secondary glazing needs to follow the layout of the existing primary window while combining practical access with fixed or lift out sections.

Most suited for copying an existing combination window, for example a bay window with top hung units over fixed lites.

Suitable for both commercial and domestic applications, with Luxury Subframe particularly suited to residential settings due to its more refined appearance.

Well suited to busy areas affected by traffic noise, even where double glazing is already fitted.

Ideal for listed buildings, heritage / conservation areas, period properties, leasehold homes, and any property where the existing external windows cannot be altered.

Also suitable where improved insulation, noise reduction and draught reduction are required without replacing the existing windows.

BROCHURES