Energy saving secondary glazing, draught proofing and insulation for properties from the South West to London

Our unique energy saving systems are quick to install with little disruption to your property. We estimate that the energy used for the installation is saved in around three months and with a phenomenally high return on investment – it’s a system that works equally for your pocket, your property and the planet.

CosyGlazing is a unique secondary glazing system that is elegant, effective and unobtrusive. Made of plexiglass – a modern, lightweight equivalent to glass – and fixed using magnetic strips, it is easy to remove for cleaning. It can be supplied in white or with a wooden frame to complement your property.


  1. Reduces heat loss from single glazed windows by seventy per cent
  2. Fits to every type of window and you can open your windows as usual
  3. Is approved for Grade 1 and Grade 2 Listed Buildings
  4. Is made from plexiglass, which is used for aeroplane windows

Unlike conventional secondary glazing, which has a large aluminium frame, CosyGlazing mounts directly on to the opening window sashes, making it virtually invisible from the inside or outside, and allowing you to open your sash or casement windows as usual.

Lifetime Service

How we can help you keep your Cosyglazed and draught proofed windows, doors and loft or floor insulation in first-class condition.

Vacuum glazing

How our vacuum glazing can improve thermal efficiency

Window and door restoration

How we can restore your windows and doors to their former glory

Full insulation

The easiest way to combat heat loss, particularly in a period property, is to insulate it

Advice and consultancy

We can help you get listed building consent for insulation works or advise you on the best measures to improve energy ratings in your period property