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Energy Efficiency and Historic Buildings - Insulating Solid Ground Floors (Paperback)
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Energy Efficiency and Historic Buildings - Insulating Solid Ground Floors (Paperback)
Series: Historic England Guidance
Expected to ship within 12 - 17 working days
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This guidance note provides advice on the methods, materials and
risks involved with insulating solid ground floors. The energy
savings resulting from insulating solid ground floors can in many
cases be of marginal benefit when the cost and disruption to the
building fabric are considered. Insulating other building elements
is likely to produce greater benefits in energy efficiency for
significantly less cost. This is partly because a typical solid
floor already provides a degree of insulation, but mainly because
the ground beneath maintains a stable temperature of around 10
degrees C. However, where an existing floor is being taken up,
replaced or repaired, then it can be worth making use of the
opportunity to improve its thermal performance. Solid ground floors
can be a significant part of the history and character of an older
building, so taking up floors and excavating below to install
insulation can be potentially damaging to valuable historic fabric.
Even where the floor finish is of no particular historic
significance, any alterations to the floor structure beneath need
to take account of potential buried historic features and
archaeology, which can be of particular significance in churches.
If the property is listed all such work will most likely require
listed building consent. Insulating solid ground floors will alter
the performance characteristics of the floor structure. There can
be a risk of exacerbating any existing moisture-related problems
and causing problems in adjacent construction, such as diverting
moisture up into the outside walls. Introducing impermeable damp
proof membranes and materials into the floor structure which are
highly resistant to the passage of moisture, are often not
compatible with the traditional construction techniques used in
older buildings. This guidance forms one of a series of thirteen
guidance notes covering the thermal upgrading of building elements
such as roofs, walls and floors.
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