Vertical sliding secondary glazing system that has tilting functionalityVertical sliding secondary glazingSecondary glazing unit in vertical sliding configuration
Maintain Tradition......Improve Performance

Discover a range of secondary glazing solutions that not only perform well but are each custom made in-house, tailored to your exact requirements and fit seamlessly onto existing frames.
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Subtle Style......Dramatic Difference

When fitted correctly secondary glazing is a near-invisible addition that still manages to bring performance benefits akin to double/triple glazing.
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Commercial Applications......Bespoke Solutions

While secondary glazing is traditional used in classic homes intent on retaining authenticity, our units are suitable can be tailored to suit both residential and commercial applications.
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High-Quality Secondary Glazing Tailored To Any Project

A safe method of preventing heat loss and sound pollution while comfortably retaining the original characteristics of a property, secondary glazing from Incarnation is an unobtrusive and easy installed aluminium design. They come engineered made-to-measure in a variety of configurations as an easy-to-fit slim window solution that’s perfect for listed buildings. Neatly tucking onto the inside of existing window frames, secondary glazing is hassle-free and easy to install. If fitted correctly, the goal is for secondary glazing’s impact to be felt and never seen. Its unobtrusive nature means being able to improve a listed property’s heat retention, security, and soundproofing without fear of classic aesthetic compromise. An achievement not guaranteed with alternative double/triple glazing practices. Secondary glazing configurations are designed to match the design of the primary window that they sit against so that both line up neatly.

Horizontal Sliding

Secondary Glazing

Secondary glazing that slides horizontally to open
Horizontal Sliding Icon

Perfect for casement window fitting, secondary glazed horizontal sliders can be supplied in up to 5 panel configurations.

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Vertical Sliding

Secondary Glazing

Vertical sliding secondary glazing
Vertical Sliding Icon

The go-to secondary glazing style for traditional sliding sashes, vertical sliders offer improved noise and heat retention while maintaining easy sliding operation.

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Deluxe Vertical Sliding

Secondary Glazing

Deluxe vertical sliding secondary glazing
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Featuring all the perks of standard vertical sliders, our deluxe variant can also be titled at a 45 degree angle for added operation flexibility.

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Lift Out

Secondary Glazing

Lift out secondary glazing
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These panels simply lift out of their outer frame, allowing full access to the primary window behind for whenever occasional opening is required.

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Hinged To Open In

Secondary Glazing

Hinged secondary glazing

Suitable to be hung from the side or top, hinged secondary glazing panels open inwards for window spots where space is limited.



Secondary Glazing

Fixed secondary glazing unit

Fixed units are a simple but effective method of fitting onto windows that aren’t typically used, offering excellent security levels.

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Exclusive Trade Customer Benefits

Becoming a member of Incarnation Windows’ trade installer network means being able to fit the best secondary glazing units around. To help you better achieve such heights, we also provide a suite of exclusive services to help give you an edge and offer complete customer peace of mind.

Online ordering

Simple Quotes & Orders

We understand that secondary glazing isn’t something you do every day, so the process can be unfamiliar. Our single quote and order form contains all the information you need to guide you through the process of choosing the right styles and options for your project. And if you need a little more assistance, we’re just a phone call away.

Approved installer

Approved Installer Status

We only work with the best of the best installers operating in the UK today, those we believe will represent Incarnation Windows’ brand and product well. In exchange we can offer partners a highly respected ‘Approved Installer’ status, giving your customers complete peace of mind when opting for your services.

Incarnation secondary glazing brochureMarketing & Technical Support

Trade customers also benefit from access to a host of marketing material to help them sell the benefits of secondary glazing to their customers. Incarnation Windows also offer advice and technical support to all customers to ensure that the right product is fitted correctly and efficiently.

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Choose Incarnation

For secondary glazing that maintains distinguished authenticity within listed buildings and a service that’s second to none, our aluminium units come supplied to be seamlessly fitted. Tailored to your exact specification, dimensions, and style, the necessary frame & fixing options are easily accommodated.

  • An initial consultation with an expert
  • An introduction to one of our approved installers
  • A full 10 year product guarantee for peace of mind
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For home

Thatched Cottage

Removing the need to rip out old windows and replace them, secondary glazing is a lightweight aluminium alternative for cottages and rural homes.

A traditional home with secondary glazing

For commercial

Traditional Apartments

Traditional apartments suffering from poor heat and noise insulation need to no longer with secondary glazing from Incarnation.

Commercial glazing project

For Heritage

Period property

Whether your property is listed or located in a conservation area, our secondary glazing solutions are regularly accepted.

Period property glazing project

Secondary Glazing Supplier In Buckinghamshire

From our dedicated factory in Olney, Buckinghamshire, Incarnation can quickly turnaround and supply our complete range of secondary glazing units nationwide to most major UK areas. This means no traditional or listed building need suffer from intrusive draughts, cold spots, and noise pollution, and that installers everywhere can comfortably cater to them.

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