Secondary Glazing

For the owners of many Grade 1,2 or 3 listed buildings or properties in conservation areas, Secondary Glazing is often the only available means of ensuring adequate insulation when double glazing or modern thermally broken window frames are not permitted.

Secondary glazing frames are designed to be as least intrusive as possible, which is why they are very difficult to photograph. They are usually installed within the internal window reveal but can also be fixed over stone mullions or sash windows. The main styles are:

  • Horizontal Sliding Frames - With 2, 3 or 4 sliding panels for windows with side hung casements.
  • Vertical Sliding Frames - for sash windows (the panels tilt back for easy cleaning).
  • Lift Out Frames - for porch windows or locations where access is rarely required.
  • Side Hung Frames - for locations where egress may be required to compy with fire regulations.

The air gap (with low-e 'K'glass if required) will provide both additional insulation and (with 'Stadip' or 'Optiphon' glass) a really effective reduction in unwanted noise from nearby roads.

In the past 8 years alone, we have carried out several hundred residential and commercial installations. In 2011 we installed over £35,000 worth of heavy duty twin sliding secondary glazing frames (each 5 ft wide x 10 feet high) in a major listed building in Coventry that was being converted into a hotel.

You can rely on our unrivalled expertise, free site visits and detailed quotations.