Insulated Glass Units

Insulated glass units for use in domestic and commercial construction

Double glazed units help to keep heat in and noise out. Firman Glass in Romford can supply bespoke sealed units in large sizes to meet the needs of your project.

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Sealed double glazed units

Firman Glass is one of the UK’s leading independent processors of specialist sealed double glazed units for commercial and domestic construction markets.


We can manufacture some of the largest and heaviest specifications available and can include structural layers for walk-on roof lights and floors with anti-slip options. This can include the new Saflex DG41 structural PVB interlayer to reduce overall glass thicknesses.


All sealed units are silicone sealed using SIKA HM25 PLUS.


Toughened glass can be produced to measurements up to 2850mm wide x 4950mm high and laminated glass to 2800mm wide x 6000mm high.


Firman Glass has sophisticated software packages to assist with U value and G value calculations, wind, barrier and snow loadings and bolted glass applications.


For more detailed information on these specialist products please contact our sales team in Romford.

Glass bends

We'll build insulated glass units to your bespoke specifications

Get the care you need, from professionals who are leaders in their fields.  

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