Restauro® Window Glass

Mouthblown Cylinderglass

Mouthblown Cylinderglass

Perfect monument preservation
Glass variety

Genuine Lamberts Restoration Glass (cylinder glass) is specially crafted traditional window glass to meet the requirements for renovation of old buildings, the preservation of historical monuments and restoration of antique furniture.

Until the early 20th century, all window-glass used to be manufactured by gaffers with blowpipes. Glashütte Lamberts has preserved these production techniques and provides the authentic charakter of historic window-glasses until today.

Mouthblown original Lamberts Restoration Glass is an indispensable part of every glazing restoration, that requires the original air of historic windows.


Mouth-blown flat glass is real craftsmanship. In the Lamberts glassworks, as one of the last production facilities in the world, this glass is still produced using the centuries-old craftsmanship that has hardly changed to this day.

Glassmakers form the viscous glass mass into an elongated glass balloon by turning and blowing on the glassmaker's pipe.

Cut open on both sides, the result is a glass cylinder which, when cooled, is cut open lengthwise and, after being reheated, is opened and stretched into a flat sheet of glass.

"quality check restauro(R) ".
Here you can see the texture of genuine mouthblown and handcrafted window glass

Here the Science Channel (How it's made) reports on our hand-blown window glass.

The special features of our restauro®-window glass:

  • The mouth-blown Lamberts Original Restoration Glass (so-called cylindrical glass / cylinder stretch glass) is an indispensable component of any restoration project which needs to satisfy the requirements for this classic type of glazing.
  • There are a multitude of further processing options for our mouth-blown window glass. Is can be used as a hardened (pre-stressed) single pane, as an outer pane in insulating glass or as laminated glass.
  • The result is a perfect symbiosis between contemporary thermal insulation and historically correct appearance.
  • Handcrafted window glass is used whenever the sharp and hard reflections of machine-made glass are to be avoided in order to preserve or regain the original appearance of historical buildings.
  • Depending on the period and architectural style (Romanesque / Baroque / Rococo / Classicism / Historicism / Art Nouveau / Bauhaus Style / New Building and Modernism), we offer you the appropriate glass.
  • Mouth-blown restoration glass is the first choice for authentic monument preservation.

Please contact us, we will be happy to assist you with your selection!

Varieties of LambertsGlas restauro®

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Fields of application

The preservation of historically valuable buildings is of great importance today. The window and its effect have a considerable bearing on the appearance of a building facade.

In terms of monument preservation, restoration with preservation glass manufactured according to original procedures is the only safe and correct way!

Alternative, machine-made, historicizing products on the other hand, often clearly disfigure an old building facade!

Glass produced according to the original mouth-blowing procedure fits into the facade easily and unobtrusively. Replacement products from industrial production, on the other hand, are immediately obvious and irritating to the eye, due to the regularity of their appearance and reflection!

The repair and maintenance of historic window constructions requires a high level of craftsmanship and knowledge.

Simply contact us, we will be happy to assist you with your selection!

Sample projects

Frauenkirche | Dresden, Germany

    Restaurant "Glanzers Michl" | Schesslitz, Germany

      Ludwigsburg Castle

        Monument Preservation

        Our restoration glass (“cylinder glass”) is flat glass specially tailored to the requirements of high-quality renovation of older homes, buildings, monument preservation and furniture restoration.

        Our mouth-blown window panes are offered in a wide variety of finish options. It can be supplied as a hardened individual pane, or as an external pane for insulating glass or laminated glass.

        Our restauro® glass is available in many variants. We would be happy to advise and supply the right solutions if you require authentic UV, infrared or other protective glazing.

        Mouth-blown window glass – only the original is authentic!

        Gold medal for highest quality

        Here you can see a short video, which should give you a better idea of the character of these glasses:

        • restauro® Light 2 mm
        • restauro® Classic 3 mm
        • Restauro® Waldglas greenish