Our Services

Bespoke design, manufacture and installation

These are backed by the fact that we are an original designer of secondary glazing with a large product range to meet hugely varied performance and design preferences.

Free technical advisory service

The company has amassed a wealth of practical experience and the Technical Team provide advice on design options, performance specifications and the many practical issues that must be considered to ensure a successful installation.

Secondary glazing project estimates

These are prepared in different ways and the service is free.
This is a preferred approach for many projects, particularly those with complex windows or those involving other trades with interfaces to the windows.
Performance requirements are discussed, and full details taken of all specified windows. Design options, enabling works and access requirements are included in a detailed estimate.
The technical advisor is then available to discuss the proposals and deal with any queries.
Early-stage design can lead to better outcomes.
A technical advisor will review the documents and discuss the project with the client or technical team before preparing a detailed estimate.
A subsequent site visit is recommended to allow a more detailed view of enabling works, adjacent trades, and access arrangements. The technical advisor will manage this.
Available to those who prefer to arrange a cost estimate before a site visit. This can be prepared from photographs and window dimensions. For further guidance on what the technical advisor would require can be found here
Once all the information has been supplied, an indicative costing will be prepared and emailed to you.

Design and Specification Collaboration

Sometimes the application of secondary glazing falls well outside the ‘norm’ and may require Selectaglaze to design a bespoke or specialist fixing solution specific to the project. By collaborating at an early stage on specification and design, potential issues can be identified and addressed before reaching a point that could jeopardize the integrity of the treatment or programme of works.

Listed Building Consent for secondary glazing

Selectaglaze can carry out this work as a paid service. All windows are surveyed, and appropriate drawings prepared to allow submission. Details are available on our Heritage and Listed Buildings page.


Selectaglaze manufactures secondary glazing at its factory in St Albans
All windows are manufactured at our St Albans factory.
Any special sub frames are machined, and spray finished.
For projects including installation responsibility a detailed production survey, including all necessary timber sub framing, is completed for each window by the Company’s own Project Mangers.


Selectaglaze installer fitting secondary glazing at Plumstead Library
The Company employs experienced Installation teams to ensure that windows are carefully fitted and functioning correctly.

Aftercare and Guarantee

Installations are supported by a 10-year guarantee apart from spring balances which have 5 years. Maintenance detailed in the Operation and Maintenance manuals is generally straightforward but the Company can carry out inspection and service work upon request. 

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