Conservation and restoration of stained glass since 1923
Stained glass conservation and restoration is a separate field from stained glass construction. The J.M.Bonet workshop has conservators and restorers specialized in this field and specialists in each field of stained glass capable of responding to any situation. The workshop has extensive facilities, microscope, light tables and collaborates with the best historians, physicists and chemists in the study of stained glass. J.M.Bonet attends the international congresses on conservation and restoration.
In this field, we provide the client with the ability to correct possible deterioration by working directly on the deteriorated windows as well as with advisory/consulting services to heritage managers, architects, restorers in the drafting of conservation-restoration projects to know the state of conservation of their stained glass windows and the stages and future costs of their restoration.
J.M. Bonet’s curators visit the building. They have equipment for photography and data collection of the main parameters for glass conservation. J.M. Bonet collaborates with specialists from other specialties, historians, physicists, architects, conservator-restorers, which allow us to obtain a multifaceted vision of the stained glass windows. This allows the generation of complete reports documenting the deterioration, past interventions, history and origin of the stained glass windows. These documents are essential to know the state of conservation of the object and to propose the necessary conservation measures.
Often interventions require urgent decisions to be made in others to establish long-term conservation strategies and simple conservation measures allow stained glass windows to be conserved for many years without high estimated costs for the various proposals. J.M. Bonet’s technicians are in charge of the conservation strategies for the stained glass windows of several heritage buildings.
We meet the demands of large cathedrals or public buildings that want to know firsthand the state of conservation of their stained glass windows but we attend with equal care to the small owner who has a domestic geometric stained glass window that has suffered deterioration.
Part of the stained glass conservation work is done in private homes. The workshop offers the service of conservation and restoration of stained glass windows. In most cases they are geometric stained glass windows made in the 60s and 70s, floral stained glass windows in interior doors. In all cases the restorers of the workshop can visit the home and make estimates to solve the conservation problems of the stained glass windows. If there are broken pieces in the stained-glass windows, lacunae, lead in bad condition or poor preservation of paints, grisaille and enamels, we will offer you different options to stabilize, correct or reintegrate these problems.
Heritage architects, conservators – restorers and heritage managers of cathedrals, private and public palaces are unaware of the state of conservation of their leaded glass windows. They are usually located in high places that are difficult to access and to make a good diagnosis it is necessary to have previous experience. J.M. Bonet’s specialists visit the building and write detailed reports and budgets detailing the restoration interventions and proposing preventive conservation measures. These documents are often useful in the drafting of public tenders or as a chapter to be added to the conservation master plans for the whole building.