Historic Scotland Technical Paper 9: Slim-profile Double Glazing; Thermal Performance and Embodied Energy

Gillian Frances Menzies

Research output: Book/ReportCommissioned report

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Abstract

Historic Scotland Technical Paper 9 consists of three research reports presenting the results
and analysis of studies on the thermal performance and embodied energy of slim-profile
double glazing. Other factors, such as appearance, cost or practicalities of slim-profile
double glazing or secondary glazing are not considered in this Technical Paper. Two of the
research reports were part of a wider project, developed and led by Changeworks for the
City of Edinburgh Council from March 2009 to March 2010.
Slim-profile double glazing is of smaller thickness than conventional double glazing. Due to
this slimness, it is, in many cases, possible to fit it into windows designed for single glazing.
For the research, the thermal performance of ten slim-profile double-glazing systems was
measured, and the performance of the whole windows calculated from the measurements.
For comparison, a single-glazed window was calculated with and without secondary glazing.
The best thermal performance was calculated for the window fitted with vacuum double
glazing. The thermal performance of the single-glazed window fitted with secondary glazing
was not as good as that with vacuum glazing, but better than the other slim-profile doubleglazing
systems (with one minor exception). Better thermal performance was calculated for
slim-profile double glazing when fitted into Victorian style ‘1 over 1’ windows compared to
Georgian style ‘6 over 6’ windows.
Inert gases account for a significant proportion of the embodied energy in most doubleglazing
systems with xenon carrying a particular high embodied energy.
Original languageEnglish
PublisherHistoric Scotland
Number of pages60
Publication statusPublished - 2010

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