Horizontal Sliding Secondary Glazing

Ideal for large windows and spaces with limited access. Best for large or wide windows and areas with limited vertical space.

SPACE
EFFICIENT

EFFECTIVE THERMAL
INSULATION

SMOOTH VERTICAL
SLIDING

EFFECTIVE ACOUSTIC
INSULATION

Horizontal Sliding Secondary Glazing Overview

The most common secondary glazing style, horizontal sliders feature panels that slide from side to side. This type is perfect for wide windows or areas where vertical space is constrained. The sliding mechanism is smooth and efficient, providing easy access to the existing window and excellent insulation without the need for additional space for opening.

Maximum Sizes
Extras
Glazing
Finishes

Maximum Sizes

Note: all sizes are for guidance only, and depend on several factors (including glass and subframe). Units and styles outside of those listed are sometimes possible – please contact us for advice.

Panel (4mm glass) Panel (6mm glass) Panel (6.4mm lam)
STYLES MAX W & H MAX W & H MAX W & H
Two Panel Slider H1678mm x W2700mm H1878mm x W2700mm H2378mm x W2700mm
Three Panel Slider H1678mm x W2700mm H1878mm x W2700mm H2378mm x W2700mm
Four Panel Slider H1678mm x W2700mm H1878mm x W2700mm H2378mm x W2700mm
Five Panel Slider H1678mm x W2700mm H1878mm x W2700mm H2378mm x W2700mm

Extra Options

While the idea behind secondary glazing is for it to go unnoticed, there are several extras we can incorporate into our units while still maintaining this sentiment. Fly screens, for example, are a completely clear addition that allows properties to be easily ventilated, simultaneously preventing flies and bugs from getting in. Equally, units can be supplied in any desired shape with arches, helping you to accommodate even the most awkward of aperture sizes.

Glazing Options

There are multiple glazing options, styles, and thicknesses possible with our range of horizontal secondary glazed units, each designed to enhance either safety & security, thermal efficiency, or noise reduction. All secondary glazing comes pre-glazed with 4mm clear glass as standard, with available options including laminated, toughened, and K glass.

Finishes

Our secondary glazing comes in three classic finishes: White, Black, or Brown. For a more personalised touch, frames can be sprayed in any RAL colour or supplied unfinished to suit your specific requirements—all available at an additional cost. Timber subframes are prefinished in white as standard, with optional colour-matching available to ensure a flawless finish for any interior.

Custom Colours, Seamless Style

Blend your secondary glazing effortlessly to match your existing interior and exterior design. With thousands of RAL colour options available, we’ll help you create a finish that fits seamlessly with your space.

From heritage properties to modern residences and commercial spaces, our colour-matched frames are designed to complement any setting beautifully.

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© 2025 Incarnation Window Systems Ltd

© 2025 Incarnation Window Systems Ltd

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