Historic England 2020 Stained Glass Windows: Managing Environmental Deterioration, Swindon, published by Historic England in 2020 defines crown glass, or spun glass as a: “Method of producing sheet glass by hand. A bubble of molten glass is transferred onto a solid metal ‘punty rod’, or ‘pontil rod’, which can be spun between the hands of the glass blower. The blowing pipe is then cut away, and the molten glass spun using the punty rod until it suddenly opens out into a disc, or ‘table’. The earliest known crown glass in England dates from the 1440s; it was widely used for windows until the mid-19th century, when taxation by weight ceased and cylinder glass became cheaper.”
Maintaining traditional plain glass and glazing, published on 1 November 2007 by Historic Scotland, states: ‘Crown glass was made by blowing and then spinning molten glass into a large thin disc known as a ‘table’ which was then cut into smaller panes. The glass is slightly curved and distinctive semi-circular lines called the ‘ream’ can often be seen in the glass. Crown glass is thinner than cylinder glass, but is also brighter and shinier as it never came in contact with a hard surface while molten. The seed lies in concentric circles, and panes often have a ‘bellied’ appearance when used in windows. Crown glass became increasingly popular from the middle of the 18th Century.’
NB Archaeological Evidence for Glassworking, Guidelines for Recovering, Analysing and Interpreting Evidence, published by Historic England in 2018, defines a pontil scar as: 'The circular protrusion of glass left on a glass object after removal of the pontil iron, although it was ground away on finer vessels.'
The Heritage Sector Resilience Plan, developed by the Historic Environment Forum (HEF) with the support of Historic England, has been launched.
An ‘All-Island’ commitment to Ireland’s vernacular heritage has been established with the signing of the North South Agreement on Vernacular Heritage, supporting traditional buildings etc.
Canons House, a landmark building on Bristol Harbourside, has been awarded Grade II (GII) listed status having been built as a regional headquarters for Lloyds Bank between 1988 and 1991 (Arup)
The Building Research Establishment (BRE) has announced a new project with the Department for Business, Energy and Industrial Strategy (BEIS) to improve and modernise the home energy rating scheme used to measure the energy and environmental performance of UK homes.
Sector lead the Construction Skills Certification Scheme (CSCS) has recognised the IHBC’s professional accreditation and support (CPD etc.) in awarding its PQP (Professionally Qualified Person) cards.
The IHBC’s 2022 Aberdeen School Heritage MarketPlace (4.30-7.30PM, 15 June) is designed to extend the scope of a traditional IHBC School exhibition floor.
Work to repair a fire-hit medieval hotel in Gloucester is underway as crews have started work to strip back some of the modern trappings and reveal the historic framework.
Options for in-person and virtual delegates to explore ‘heritage on the edge’ across up to 4 days of IHBC engagement & learning.
The Secretariat to the European Heritage Heads Forum has has coordinated its declaration of solidarity and support for Ukraine’s cultural heritage institutions.
2022 will see the IHBC mark a quarter of a century since our incorporation as a professional body supporting and accrediting built and historic environment conservation specialists. We’re kick-starting it by inviting your ideas on how to mark this special year!