VERTICAL SLIDING SECONDARY GLAZING

Perfect for traditional and heritage properties. Best for sash windows and traditional aesthetics.

Traditional
design

EFFECTIVE THERMAL
INSULATION

SMOOTH VERTICAL
SLIDING

EFFECTIVE ACOUSTIC
INSULATION

Vertical sliding secondary glazing overview

Incarnation secondary vertical sliders are designed from the ground up to fit over traditional sliding sash or modern ‘mock sash’ windows. As one of the most popular window styles found in listed buildings, they use tensioned balances to support the sashes, letting them slide up and down easily. This style is particularly suited for sash windows and properties where maintaining a traditional look is important.

There is also the option of upgrading to tilting vertical sliders, allowing for easy cleaning and maintenance of both the primary and secondary windows.

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
Vertical Slider H2300mm x W1500mm H1910mm x W1400mm H1805mm x W1400mm

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.

A COLOUR TO SUIT YOUR SCHEME

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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