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Blog25 Apr 2026  |  4 min read

Secondary Glazing for Flats and Apartments

Urban flats and apartments are particularly susceptible to noise and poor thermal performance. Secondary glazing provides a practical, affordable and lease-friendly solution for flat owners across the UK.

Secondary glazing suits flats particularly well: no external alterations (satisfies most leases and conservation requirements), no structural work, fully reversible, and highly effective at urban noise reduction.

Lease Considerations

Most leases permit internal alterations that do not affect the building structure or external appearance. Secondary glazing satisfies this. If unclear, obtain written consent from the freeholder before proceeding.

Urban Noise

Urban flats face road traffic, pedestrians, bars, restaurants, neighbours and public transport. Our acoustic specification (6.8mm acoustic laminate, 150–200mm cavity) is optimised for urban noise and consistently delivers 80% noise reduction.

Sash Windows in Mansion Blocks

Victorian and Edwardian mansion blocks with original timber sash windows benefit enormously from BVS/TBVS secondary glazing — designed for sash windows, invisible from outside, outstanding noise and thermal performance.

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Ready to find out how secondary glazing can benefit your property?

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