As shown on the preceding page, continuity of insulated
construction in the external envelope is necessary to prevent
thermal bridging. Nevertheless, some discontinuity is unavoidable
where the pattern of construction has to change. For example,
windows and doors have significantly higher U-values than
elsewhere. Heat loss and condensation risk in these situations is
regulated by limiting areas, effectively providing a trade off
against very low U-values elsewhere.
The following details should be observed around openings and at
ground floor ~
dpcinsulation batts
installed at least
150mm below top
of floor
insulation
Thermal Bridging