Secondary Glazing in London
Add an internal glazed layer behind an existing window to improve comfort while retaining the original external window — especially useful where replacement is not the preferred approach.
Keep the original window. Improve the room behind it.
Oakview’s secondary-glazing information focuses on reducing draughts, heat loss and outside noise while keeping the existing window in place. The exact result depends on glass, air gap and the existing opening.
Options to shape around your property
Final availability and specification depend on the selected system, opening and survey.
Thermal Comfort
An additional glazed layer and better air sealing can reduce draughts and heat transfer.
Explore →Noise Reduction
Different glass types and air gaps can materially change acoustic performance.
Explore →Heritage-Friendly Approach
Secondary glazing can be considered where retaining original windows is important.
Explore →Opening Styles
Fixed, hinged, lift-out, horizontal and vertical sliding options are referenced.
Explore →
Specify the product around the building — not the other way around.
Material, opening style, glazing, colour and hardware all affect how the finished installation looks and performs. Oakview’s team can help you compare the available options before the quotation is finalised.
For independent background on compliant replacement installations, see FENSA.
Explore the Oakview gallery →Secondary Glazing — key specification
These points summarise Oakview’s currently published service information. Your quotation should confirm the exact system and performance values supplied.
- System concept
- Additional internal glazed layer behind an existing window
- Glass choices
- Standard, laminated and acoustic glass options are referenced
- Sound performance
- Oakview references test results up to 45 dB reduction depending on glass choice and configuration
- Vent / opening styles
- Fixed, hinged, lift-out, horizontal slider and vertical slider options
- Low-E glass
- Available to help reduce heat loss
- Fly screens
- Optional on selected configurations
Product choice is only part of a good installation.
Survey, specification, detailing and fitting all influence the final result.
A family-run London window and door company with long-standing installation experience.
Oakview is FENSA registered for relevant replacement window and door work.
Oakview states a 10-year guarantee across windows, doors and conservatories.
Discuss materials, colours, glazing and project requirements with the team in person.
Explore the services that sit closest to this project.
Internal links below take you to the most relevant Oakview product pages for comparison.
Secondary Glazing questions
Useful starting points before your survey and quotation.
What is secondary glazing?
Secondary glazing adds another glazed layer inside the existing window rather than replacing the original external window.
Can secondary glazing reduce noise?
Yes. Oakview’s existing information includes acoustic test results, but the actual reduction depends on the existing window, glass choice, seals and air gap.
Is secondary glazing useful for period properties?
It can be useful where retaining the original windows is important, subject to the property, planning context and installation details.
What opening styles are available?
Oakview lists fixed, hinged, lift-out, horizontal sliding and several vertical sliding configurations.
Start with a survey and a clear specification.
Tell us about your property, opening sizes and the result you want to achieve. We’ll help you compare the appropriate options and prepare a tailored quotation.