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This colourless glass, with the irregular surface, characteristic of window glass is common to the 18th and 19th centuries, is made by the traditional Fourcault method which gives it the authentic wavy surface, Heritage Drawn 4.5 comes offers the largest restoration sheet sizes of all our Heritage ranges.

Our Heritage Drawn 4.5 can be toughened to meet safety standards, and we supply for all sizes of project, from a single pane to complete stately homes.

For the best thermal efficiency, we also pair our Heritage  glass with a modern glass sheet, to create Heritage ECO Laminated sheets or slimline Heritage Double Glazed units. Please see below for more details on this. 

The authenticity of Heritage Drawn 4.5 glass, with its mild wavy surface distortions is only found in original window glass using this traditional Drawn Glassmaking process.

Our glazing is suitable for installing in stone mullion, steel, leaded windows and wooden window frames (as seen in the main picture above, in a building in Kew Gardens, London). We will advise you of the correct glazing choices for your project.

We’re here to help you to get the correct glazing solution for your project, so please contact our expert team.

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TATRAGLASS HERITAGE Drawn SINGLE SHEET – authentic heritage glass

In the 20th century, the industrial revolution allowed the mechanisation of glass production. Two processes emerged: the drawn glass and “float” glass processes.

Glass drawing produced a larger and more regular surface and was very popular between 1920 and 1960.

Since 1960 the “float” process has consisted of floating a strip of molten glass on top of a bath of molten tin. This produces glass of a very large format with a perfectly flat surface and uniform appearance, unlike the wavy form of this drawn glass.

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Applications

Ideal for the restoration of construction work dating from 1920 to 1960.

As the name suggests, this glass has an average thickness of 4.5mm, and can be toughened to adhere to safety standards.

We can cut the glass to any shape to fit into fanned windows, or other bespoke window frame shapes.

  • Machine Drawn

  • Victorian to 1960

  • 4.5mm thick

  • Ug = 5.6W/(m2.K) thermal rating

Victorian to 1960 Restoration Glass

Our Heritage ECO Laminate range has the benefit of being classified as single glazing and is environmental benefits of lowering heat loss because we pair the Heritage glass of your choice with a hi-tech, high-thermal rated safety glass with UV filtering to protect furniture from fading, and provides the benefits of adhering to safety standards.

Applications

Adding extra thermal values while still achieving a single pane (see the technical table below), helpful in conservation areas and where a building is Listed. Please speak with your local Conservation Officer to gain the relevant advice and permissions when choosing your glass. Our expert team will be able to give you initial advice to help when speaking with your Conservation Officer.

Our Heritage Drawn 4.5 ECO Laminated range has the benefit of being classified as single glazing and is environmental benefits of lowering heat loss because we pair the heritage glass of your choice with a hi-tech, high-thermal, with UV filtering to protect fabrics from damaging UV rays.

Technical detail (click here)

Authentic heritage glass with added thermal and acoustic qualities.

The modern glass that we laminate the historic glass to has a special coating on it called Low E, which reflects heat back into the room and keeps harmful UV rays out while allowing heat from the sun into the room.

This unique system for replacing single glazing on Victorian to 1960 properties is recommended by planning authorities in even the most sensitive conservation areas.

The laminated glass is made up of 2 sheets of glass laminated together to create a single, technically advanced sheet. The outer side is an authentic glass with the gentle waviness and imperfections expected, and the inside surface is the modern glass with it’s thermal benefits and the lamination process itself gives acoustic benefits.

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  • Machine Drawn

  • Victorian to 1960

  • 8.8mm thick

  • Ug = 3.6W/(m2.K) thermal rating

  • Hand Drawn glass laminated to Low E glass

Our Heritage Double Glazed range has the same benefits and characteristics of our ECO Laminate range, with the added benefit of even better protection against heat loss, which is achieved using gas fill to the unit. As a slimline conservation grade Double Glazed unit, units start from 10mm overall thickness and are suitable for narrow rebate windows while retaining the external appearance of period glass.

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SLIMLINE HERITAGE DOUBLE GLAZING, offering the maximum eco thermal and noise reduction benefits.

Our Heritage Double Glazed range has the same benefits and characteristics of our ECO Laminate range, with the added benefit of even better protection against heat loss as it is a slimline conservation grade Double Glazed unit, starting at only 10mm thick, so its suitable for so many more historic windows.

The glass that we pair with our Heritage glass in slim double-glazed units has a special coating called Low E which bounces heat back into the room and keeps harmful rays (which are responsible for fading furniture) out, while allowing heat from the sun into the room.

Applications

Heritage Drawn Double Glazed units are only 10mm width and is suitable for installing in steel and wooden window frames. We will advise you of the correct glazing choices for your project. We’re here to help you to get the correct glazing solution for your project, so please contact our expert team.

When using Double-Glazed glass units, in sash window units, it is important to increase the weights within the window frame to allow the window to work correctly.

We will advise you of the correct putty to use and method of installation.

Please speak to our team for advice on fixing methods, and use of the correct putty, which we can also supply.

  • Machine Drawn

  • Double Glazed 12mm Units

  • Victorian to 1960

  • 10mm thick

  • Ug = 1.5W/(m2.K) thermal rating

  • Hand Drawn glass with Low E glass

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Technical specification

ProductDetailsSuitable for
Heritage Drawn 4.5 Sheet

Thickness: 4.5mm
Thermal Rating: Ug = 5.6 W/(m².K)

Victorian to 1960
Heritage Drawn 4.5 ECO LAMINATED

Thickness: 8.8mm
Thermal Rating: Ug = 3.6 W/(m².K)

Victorian to 1960
Heritage Drawn 4.5 DOUBLE GLAZED

Thickness: 10mm
Thermal Rating: 1.5

Victorian to 1960

Heritage Drawn 4.5 was previously known as Goethe.
Heritage ECO Laminated was previously known as Eco-Rest.

CASE STUDIES:

Tatraglass Heritage Mouth Blown Glass has been used in countless restoration projects throughout the UK. Here is a glimpse of just some of the buildings which have used Tatraglass for their authentic restoration glass. 

  • Tatraglass was asked to supply Heritage glass with a safety rating to The Orangery at Kew Gardens

  • 231 panes of toughened Heritage Drawn were supplied

  • Kew Orangery is the world’s largest Victorian glasshouse!

  • We cut all of the panes to fit all of the shapes required.

Please note. All of our restoration glass types are manufactured using the traditional methods. It is intended for these products to be used for restoration, where modern float glass would give an inappropriate appearance. We cannot guarantee against small marks, seeds (bubbles), small surface scratches and surface distortion in this glass, which are not faults but characteristics of the product, which is designed to blend in with old or original period glass.

This type of glass cannot be compared to float glass, which is mass produced using modern manufacturing processes, and is virtually perfect in its appearance.