Chapter House of St Paul’s Cathedral becomes more energy-efficient

Sat adjacent to the iconic St Paul’s Cathedral, south side of Paternoster Square, is the grade II* listed Chapter House designed by Christopher Wren and his son and built between 1712-1714.

The Chapter House has been used by the Cathedral over the years for many purposes; it began as accommodation for the Dean and other members of the Chapter. Interestingly, like St Paul’s Cathedral which has been rebuilt five times, the current Chapter House was not the first to stand on site; its predecessor was destroyed in 1666 by the Great Fire of London.


Seen as the administrative heart of the Cathedral, it was refurbished during the 1950’s into offices and recently has been undergoing a major revamp while still retaining key characteristics of the building, to bring it up to 21st century office standards. Another important requirement was to improve the thermal insulation throughout the building, thus retaining the building’s heat and reducing energy bills.


Selectaglaze Ltd, specialists in the design, manufacture and installation of secondary glazing, undertook this project as their tested products can reduce heat loss by up to 50%. This is achieved by the bespoke fitting of the secondary glazing alongside the use of high performance seals.

In the Chapter House, a number of Selectaglaze products were used to suit the various window styles and sizes. These were mostly chosen from the slim-line range that is particularly appropriate for heritage buildings, as they are unobtrusive and accepted as a reversible adaptation by heritage agencies across the UK.


Established in 1969 and Royal Warrant holders since 2004, Selectaglaze boast an extensive range of products to suit the needs of different buildings. Find out more about Selectaglaze in our Professional Trades Directory or email .

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