Double and triple glazed units

An insulated glass unit is two or more panes held apart by a spacer filled with desiccant, sealed with butyl and an outer seal of polysulfide, polyurethane or silicone. It controls heat, light, sun and sound.

We make units to the schedule for your project, for facades, shopfronts and other outside walls, and can build them with Low-E, solar control, tinted or laminated panes.

For larger jobs, send the full glass schedule and any drawings.

Replacement units, supply only

If a window has misted between the panes, the seal has failed and the unit needs replacing. The frame can usually stay. We make the sealed unit to your size and thickness; fitting is done by your glazier. Our guide replacing misted double glazed units shows how to measure.

What you can choose

• Double or triple glazed
• Overall thickness to match your frame
• Toughened or laminated panes where safety glass is needed
• Low-E and solar control coatings and gas filling
• Obscure or patterned glass for bathrooms and front doors

Standards

Insulating glass units are made to BS EN 1279. Ask us for documents for your build-up when you order.

Questions we are asked

What thickness do I need?

Measure your existing unit from outer face to inner face. Common sizes are 24 mm and 28 mm, but older windows vary, so always measure.

Do you make units for new windows and facades?

Yes. For larger jobs, send the full glass schedule and drawings and we will price the whole list.