Sleek, long-lasting and efficient

Heritage Units

21st century glass technology into aesthetically appropriate double glazed units

5 year guarantee on all heritage sealed units

Aesthetically appropriate Heritage

Incorporate 21st Century glass technology into aesthetically appropriate double glazed units for traditional and historic or listed properties. It’s an issue our industry has grappled with for decades and something highlighted by the GGF who draw attention to the lack of specific test evidence available to date for IGUs constructed with narrow cavities and reduced sightlines.

With an 8.5mm sightline, it is the perfect option for those seeking a low sightline, alongside units that are made to the highest quality. Available in spacer sizes of 4mm, 6mm and 8mm in either dark brown or silver with white also available in 6mm and 8mm versions.

Heritage glazing systems

Our product comes with a five-year guarantee, which is valid when glazed in accordance with strict glazing and maintenance guidelines.

H1 Glazing System

The H1 Glazing System is recommended for use where a sole glazing material is required to provide a back bedding material, perimeter fill and putty
front without the need for multiple products.

H5 Glazing System

The H5 Glazing System is recommended for glazing where a paintable and elastic bedding compound is required and a traditional putty type will be used to provide a putty front fillet..

H7 Glazing System

The H7 Glazing System is recommended for use where a sole paintable material is required to provide a glazing compound for bead glazing single glass or Insulating Glass Units (IGU).

Maximum Manufacturing Parameters

4mm Cavity = 600mm x 600mm

6mm Cavity = 750mm x 1000mm

8mm Cavity = 750mm x 1200mm

Minimum Sized Toughened = 150mm x 250mm

EN 1279 PARTS AND 3 ACCREDITATION

CS Heritage units are available incorporating a range of period glasses to closely replicate the aesthetics of the original glass. Manufactured with the highest performing soft coat glasses on the market with either Argos or Krypton Gas, CS units can achieve U-values as low as 1.8 W/m2k with a 4mm Cavity and 1.1 W/m2k with an 8mm Cavity.

Name	Cavity	Argos Gas Fill. U Value W/m2k	Krypton Gas Fill. U Value W/m2k	Light Transmission %	g Value	Rw (db)
CS Heritage 4mm Soft Coat inner/3 or 4mm outter	4mm	2.6	1.9	80	0.71	31
	6mm	2.1	1.5	80	0.72	31
	8mm	1.7	1.3	80	0.72	31
CS Heritage Plus 4mm Soft Coat inner/3 or 4mm outer	4mm	2.5	1.8	72	0.53	31
	6mm	2	1.4	72	0.53	31
	8mm	1.6	1.1	72	0.53	31

Heritage sealed unit inspiration

View some of the installations consisting of our heritage sealed units

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Heritage units FAQ

General

What are heritage sealed units?

Heritage sealed units are specially designed double glazed units that replicate the appearance of traditional single glazing, often used in period properties and conservation areas.

Are heritage sealed units energy efficient?

Yes, despite their traditional look, heritage sealed units provide modern energy efficiency comparable to standard double glazed units.

Can heritage sealed units be used in listed buildings?

Often, heritage sealed units are suitable for listed buildings and conservation areas, but it’s essential to check with local planning authorities before installation.

What glass options are available for heritage sealed units?

Heritage sealed units can be made with various types of glass, including clear, patterned, or antique glass, to match the aesthetic of the building.

Do heritage sealed units come in standard sizes?

Heritage sealed units can be custom-made to fit non-standard window sizes typically found in older properties.