Heritage Units
Supply and Installation of Westcountry Heritage Units. These super slim, sealed glass units, offer a modern solution to an old problem when it comes to glazing heritage, period and listed buildings. Providing excellent performance without compromising a buildings appearance.
These super slim units provide excellent performance without
compromising on appearance and are the ideal solution for Heritage, Period and Listed properties.
Heritage units are measured from inside edge to inside edge and are available in 4mm, 6mm and 8mm depths. For comparison standard IGU’s usually measure 16mm or 20mm depth.
Produced to order with an authentic appearance, slim sightlines
and narrow unit cavities, Westcountry Heritage Insulated Glass Units will
compliment listed properties and historic buildings with restoration
and replication requirements.
Sympathetically providing the benefits of double glazing to older
properties without compromising a buildings aesthetics these units
are produced at our Plymouth location and to each clients
exact requirements for supply only or supply and installation.
The diagram above shows how much heat is lost through windows and doors in a modern day property. The red areas show prior to standard double glazing being installed. The right hand image shows the drastically lower levels of heat loss. Heritage and Period building will experience similar heat loss and installation of our Heritage Units expertly fitted in traditional, crafted wooden frames can have similar impact on heat loss.
Heat loss from any building is measured in by a U value and is expressed in W/m”k. The lower the U value the better the insulation provided by the relevant material. As a comparison, the U value for a typical pane of single glazing is 5.8W/(m2k)
The table below shows the some of the variations available within our Heritage units.
Heat loss from buildings is measured by U value and is expressed in W/mk2k.
The lower the U value the better the insulation provided by the relevant material.
For comparison, the U value for a typical pane of single glazing is 5.8W(m2k)

Spacer bars are an integral part of our Heritage units. They separate the two panes of glass and because we use Warm Edge spacer bars, condensation is virtually eliminated. All our Heritage units are available with Black or White Spacer bars.
Location, location, location –
The location of your property will determine which combination of glass types will provide the best benefits to your property. Our expert team are on hand to advise on the best Heritage Units for your property’s location.
Combinations include:
- Laminated 4.4mm – Interlayer between two sheets of glass. Benefits; Reduce UV rays, noise reduction, burglar deterrent
- Restoration Glass – Sympathetically reproduced glass period glass that compliments the ascetics of older buildings Benefits; Increased insulation in older properties.
- Solar Control Glass – Helps to keep the building cool in warmer weather, whist still maintaining a very low U value. Benefits; Helps prevent the greenhouse effect while maintaining good insulation properties.
- Low E Glass – This is a heat retention glass which helps reduce heat loss through the double glazing. Up to 73% of the suns heat will pass through the glass -Planitherm Total Plus. Benefits; Good light transmission and heat gain while maintaining a reduced level of heat loss.
PLEASE NOTE ALL OUR HERITAGE UNITS ARE GUARANTEED FOR 2 YEARS SUBJECT TO CORRECT GLAZING INSTALLATION AS PER OUR GUIDELINES. EXCLUDES BREAKAGES
Gallery to Show Production of Westcountry Heritage Units
- Westcountry Heritage Unit
FAQ’s
Important Notice:
The information provided in our FAQ section is intended as a general guide only. For detailed and specific enquiries, we strongly recommend contacting your local Cornwall Glass branch. Our team will be happy to assist you with accurate and personalised information.
Yes, We can apply a film to the glass to make it scratch resistant
Yes, heritage units provide excellent thermal insulation, reducing heat loss and improving energy efficiency.
Yes, heritage units offer good acoustic insulation, helping to reduce noise from outside.
Yes, heritage units can be customised with various decorative glass options.
Yes, our heritage units comply with relevant building regulations and standards.
Yes, we provide heritage units with laminated glass for added safety and security.
Yes, we provide heritage units with solar control glass to reduce heat gain.
Yes, we can apply an easy-clean coating to the glass
Yes, we provide heritage units with tinted glass for added privacy and solar control.
Yes, we provide heritage units with frosted glass for added privacy.
Yes, we provide heritage units with patterned glass for decorative purposes.
Yes, we provide heritage units with fire-resistant glass for added safety.
No, Unfortunately not.
Yes, we provide heritage units with UV protection to reduce fading of interiors.
Yes, we provide heritage units with anti-reflective glass for improved visibility.
Yes, we provide heritage units with privacy glass for added discretion.
Yes, we provide both supply-only and supply-and-installation services.
Yes, heritage units can be used in both modern and traditional buildings to achieve a specific aesthetic.
It depends on the cavity you have
4mm Cavity, we can produce a maximum size of 600mm x 600mm.
6mm Cavity, we can produce a maximum size of 800mm x 800mm.
8mm Cavity, we can produce a maximum size of 1000mm x 1000mm.
Yes, our heritage units comply with relevant building regulations and standards.
Yes, heritage units are suitable for both windows and doors.
Yes, we provide heritage units with laminated glass for added safety and security.
Yes, heritage units are designed to meet the requirements of conservation areas.
Yes, we provide heritage units with solar control glass to reduce heat gain.
Yes, heritage units are suitable for both residential and commercial buildings.
We can apply an easy clean coating to the glass.
Yes, heritage units are specifically designed for use in heritage-listed buildings.
Yes, we provide heritage units with tinted glass for added privacy and solar control.
Yes, heritage units are ideal for use in historic buildings to maintain their original appearance.
Yes, we provide heritage units with frosted glass for added privacy.
Yes, heritage units are suitable for use in museums and other cultural institutions.
Yes, we provide heritage units with patterned glass for decorative purposes.
Yes, heritage units are ideal for use in churches and other places of worship.
Yes, we provide heritage units with fire-resistant glass for added safety.
Yes, heritage units are suitable for use in schools and educational institutions.
No , Unfortunately not.
Yes, heritage units are ideal for use in libraries and other public buildings.
Yes, we provide heritage units with UV protection to reduce fading of interiors.
Yes, heritage units are suitable for use in government buildings and offices.
Yes, we provide heritage units with anti-reflective glass for improved visibility.
Yes, heritage units are suitable for use in hospitals and healthcare facilities.
Yes, we provide heritage units with privacy glass for added discretion.
Yes, heritage units are ideal for use in hotels and hospitality venues.
Yes, we provide heritage units with switchable glass for dynamic privacy control.
Yes, heritage units are suitable for use in restaurants and cafes.
Yes, we provide heritage units with low iron glass for high clarity and transparency.
Yes, heritage units are ideal for use in retail stores and shopfronts.
Yes, we provide heritage units with anti-bacterial glass for hygiene-sensitive environments.
Yes, heritage units are suitable for use in office buildings and commercial spaces.
Yes, we provide heritage units with heat-strengthened glass for added strength.
Yes, heritage units are ideal for use in sports and recreational facilities.
Yes, we provide heritage units with anti-glare glass for improved visibility.
Yes, heritage units are suitable for use in airports, train stations, and bus stations.
Yes, we provide heritage units with anti-fog glass for clear visibility.
-
- Yes, heritage units are ideal for use in cultural heritage sites to preserve their appearance.
Yes, we provide heritage units with anti-scratch glass for added durability.
Heritage units are super slim, sealed glass units designed for heritage, period, and listed buildings.
Heritage units have slim sightlines and narrow unit cavities, making them ideal for maintaining the aesthetic of older buildings.
Heritage units are available in 4mm, 6mm, 8mm, 10mm, 11mm, and 12mm depths.
The U-value varies depending on the glass type and cavity size, but heritage units offer improved insulation compared to single glazing.
Yes, heritage units are designed to meet the requirements of listed buildings and conservation areas.
Options include clear glass, Pilkington K, Planitherm Total, and more.
Yes, heritage units provide excellent thermal insulation, reducing heat loss and improving energy efficiency.
Yes, heritage units offer good acoustic insulation, helping to reduce noise from outside.
Yes, heritage units can be customised with various decorative glass options.
Lead times vary depending on the project; please contact us for specific details.
01872 276697
Truro@cornwallglass.co.uk
Chyvelah Road, Threemilestone, Truro, TR3 6AZ
01326 375124
Penryn@cornwallglass.co.uk
Commercial Road, Penryn, TR10 8AQ
01736 360174
Penzance@cornwallglass.co.uk
Poniou Way, Longrock Industrial Estate, Penzance, TR20 8HX
01726 874564
StAustellGlazing@cornwallglass.co.uk Stennack Road, St Austell, PL25 3JQ
01752 605500
PlymouthTC@cornwallglass.co.uk
3 Beechwood Way, Langage, Plymouth, PL7 5HH
01392 364364
Exeter@cornwallglass.co.uk
7-10 Bittern Units, Bittern Road, Sowton Industrial Estate, Exeter, EX2 7LW
01935 412300
Yeovil@cornwallglass.co.uk
22 Garrett Road, Lynx Trading Estate, Yeovil, BA20 2TJ
0117 9710101
Bristol@cornwallglass.co.uk
Units 1-3, 306 Broomhill Road, Brislington, Bristol, BS4 5RG