What we do


We add secondary glazing to most window types. Our speciality and expertise lies uniquely in the insulation of sash windows, whatever their age and condition. Even if they are out of square!

The addition of the extra panel against the window frame creates a much wider gap than conventional double-glazing (typically only 20mm max). The fat parcel of air trapped between the two panes acts as the insulant and the inner pane warms up. Cold air no longer drops down the window. Draughts are eliminated; the wide gap is good for noise reduction. Click for scientific data on both these aspects: reduces heat loss and noise intrusion.

A case study acoustic report is available on request.

A picture paints a thousand words! Click to view some of examples our work.