Secondary Glazing for Listed Buildings — The Complete Guide

Secondary glazing satisfies conservation requirements because it is: installed entirely internally; does not touch the original window; can be removed without trace; leaves the external appearance unchanged.

Planning Requirements

In most cases, no consent is required. Secondary glazing is a reversible, non-intrusive internal alteration. Check with your local conservation officer. Requirements vary. We can assist with documentation for any consent applications.

Best Systems for Listed Buildings

Sash windows: BVS/TBVS balanced vertical sliding. Casement windows: hinged units. Fixed lights: lift-out or fixed panels. Arched and shaped windows: bespoke made-to-measure units. Leaded lights and stained glass: fixed secondary glazing panels.

Performance

Up to 80% noise reduction with acoustic specification. Up to 65% heat loss reduction with Low-E glass. Eliminates draughts and condensation. Protects original glass from temperature deterioration.