| http://www.w3.org/ns/prov#value | - The report noted that the problems are historical, dating back to insulation schemes of the 1980s and 1990s, and can be attributed to factors such as inadequate insulation being pumped into the cavity; insulation being pumped at an inadequate pressure; poor workmanship and supervision; and inspection methods in the 1980s and 1990s not being as advanced as today.
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