TECHNICAL BULLETIN
ISSUE 41
SEPTEMBER 2022
UNDERFLOOR SPRAY FOAM INSULATION NIGHTMARE SCENARIO OR DREAM SOLUTION? HILARY GRAYSON BSC EST MAN (HONS), DIRECTOR OF SURVEYING SERVICES, SAVA
Waltham Forest Borough Council has recently undertaken a comprehensive retrofit of energy efficiency measures on a property at 47 Greenleaf Road, a typical Victorian end terrace property in Walthamstow, east London. Built in 1902, the property was typical of its age with poor energy performance, an EPC energy rating of E, and an annual heat demand of 17,219kWh. This article looks briefly at the measures installed, and in particular, at the underfloor insulation solution employed at the property.
Background
Waltham Forest also wanted to address the issue of fuel poverty. At the time of the report, 14.6% of households in the borough were in fuel poverty (in 2019, across England as a whole it was 13.4% or 3.18 million households in total).
In 2019, the London Borough of Waltham Forest published a report indicating that 51% of its carbon emissions came from the residential homes within the borough. The borough is representative of many urban areas with 70% of the housing dating from before the second world war. In Waltham Forest’s case, this amounts to 107,216 homes.
Fuel poverty in England is measured using the Low-
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