Heritage glazing

Ensure compliance for Grade listed buildings in the UK with our range of ‘heritage site’ double glazing units

Grade listed buildings and buildings with planning control orders are not permitted to fit standard double-glazed systems in either wood or plastic. Traditional style frames must be used for aesthetic purposes but these will not provide the thermal and acoustic benefits of modern glazing. In order to solve this problem our special slim and low sightline units have been developed.

A standard double-glazed unit would usually have a 10-12mm black border  where two pieces of glass are bonded together to be a minimum thickness of 14mm. This black edge would show when installed into the more delicate traditional style frames. Our low sightline units have a black border of 7mm (+/-1mm) and are available from 10mm thick making them the perfect solution to your heritage site needs.

Our units are of superior quality to many others on the market and very competitively priced. We don’t cut corners by stripping down warm edge spacer made for standard double glazing and using it on heritage units. All of the materials used in the manufacture of our units have been specifically designed and tested for optimum performance. Please ensure you speak with a member of our sales teams to ensure to get the correct specification.

We offer many options for your bespoke units:

  • Bespoke window leading service with the option of 4mm, 6mm, 9mm, 12mm lead as well as a range of colours
  • Bespoke sandblasting service
  • Choice of glass types (self-cleaning, acoustic and laminated glass)
  • Choice of obscure glass
  • Soldered leading joints
  • Authentic glass (Crown Glass etc.)

The double-glazed units will:

  • Maintain the character of your property
  • Keep your property cooler in the summer
  • Reduce noise pollution
  • Help fight against condensation
  • Comply with ‘Document L’ Building Regulations
  • Protect the environment by reducing carbon emissions

The units are made up as follows:

  • Slim profiles that start from a minimum of 10mm thick
  • A maximum 7mm seal depth (-1mm tolerance) to provide the low-sight line for traditional timber windows
  • ‘Edgetech Heritage Super Spacer’ the best warm edge on the market
  • U-Values as low as 1.2 with a 6mm cavity providing up to 77% less heat loss compared to traditional single glazing
  • Improved acoustic performance, assisted by the use of super spacer and heavy inert gases

Product Features

Warm-Edge Benefits

Superior silicone foam insulation; low thermal conductivity; substantially reduced perimeter condensation; typical improvement of 0.2W/m2K on overall window U-value.

Silicone Foam Features

Excellent UV resistance; extreme temperature performance; fast dew point drop; superior compression-set resistance; excellent colour stability; enhanced sound dampening.

Edge Seal Durability

Continuous vapour barrier at corners; no chemical fogging; high desiccant content.

Unique Dual-Seal Design

Outer hot-melt butyl sealant for enhanced gas retention; inner structural acrylic side adhesive; immediate unit handling; no cold flow or spacer/ seal migration.

Improved Productivity

Fast application; elimination of desiccant filling; no corner key assembly; simplified shaped unit production; limited equipment investment; small labour force required.

Pleasing Aesthetic Appearance

Smooth matte surface finish; pleasing neutral appearance; no surface blistering or bubbling; straight line application with 90° corners. Ultra slim sightline.

Contact a member of our sales team on 01609 779948 or complete our web enquiry form

Please note images are stock photography for illustrative purposes only.

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