Issue 33 web - Flipbook - Page 16
Secondary glazing for listed properties
Windows, particularly in listed properties, is a major
source of heat loss. One means through which this can
be addressed in listed properties is by using secondary
glazing. Unlike double glazing, this is permitted in listed
buildings and doesn’t change the overall aesthetic of the
Secondary glazing can be fitted as openable, removable,
or fixed units. Openable panels can be sliding sashes or
side hung casements. These still allow access to the
external window for cleaning and opening the secondary
glazing and also the exterior windows for ventilation.
Fixed types of secondary glazing can be removed during
the summer if the heat retention aspects are not required.
Above, Storm work in progress
Research has shown that heat loss through conduction
and radiation through a window can be reduced by over
60% if you use secondary glazing with a low emissivity
hard coating facing the outside. As well as increasing the
thermal performance of windows, secondary glazing can
have several other benefits, such as reducing noise.
The UK’s most famous pensioners enjoy the benefits
of secondary glazing
With their distinctive redcoats and fascinating personal
histories, the Chelsea Pensioners are arguably the UK’s
most famous retirees. The Royal Chelsea Hospital
residents are deserved beneficiaries of a purpose-built safe
haven for elderly veterans, which King Charles II initiated
in the 17th century. The 300 veterans who live there have
all served at least 12 years in the British Armed Forces.
Above, Storm work in progress
Over recent years, the building has been undergoing
extensive renovation and modernisation while being
sensitive to its historic fabric and aesthetic legacy. This
£13 million restoration brings the West Wing up to 21st
century standards allowing residents to have their own
bedroom with en-suite shower room facilities and study.
As part of this process, the overall energy efficiency of
the building needed to be improved. Storm Windows,
specialists in providing bespoke secondary glazing for historic buildings, were commissioned to fit secondary glazing
at the hospital. The aim was to make each room warmer
and more comfortable for the residents while driving
down energy costs. This had to be done in keeping with
the overall aesthetic of the building.
Above, The Royal Chelsea Hospital
installing a secondary double-glazing system over 12
Storm Windows was commissioned to take on this
important task thanks to their experience working with
historic buildings and their commitment to innovation.
Their new, improved unit allows for windows to be fully
opened, has better ventilation and is spring adapted.
To find out more about how secondary double glazing
systems can radically improve the energy efficiency of your
listed property, call 01384 636365
or email email@example.com.
As well as large scale renovations on famous listed
buildings, Storm Windows also provide a secondary
double-glazing for more modest properties. They also
have an interest free payment plan to spread the cost of
Conservation & Heritage Journal