Mission church - Improved insulation

As the building was considered a non-designated heritage asset for planning purposes the change of use benefited from some exemptions from the building regulations to ensure that the upgrade work was sensitive to the character of the non-designated heritage asset.

Whilst exemptions were available Geoff and Julie were keen that the building was as environmentally sustainable as possible.

High levels of insulation were achieved through the following:

Existing modern concrete flags and slab was removed and a new breathable limecrete floor and insulation installed.
Whilst the original aim was to retain the lath and plaster, it was discovered during investigations that the lime plaster was applied directly to the underside of the battens and had to be removed. This provided the opportunity for achieving high levels of insulation at roof level by full filling the rafters with insulation, plastering and providing false battens on the underside of the ceiling to replicate the rafters.
An innovative lime, clay and cork based insulating plaster was employed on the walls. The product has a thermal conductivity of 0.045 W/mK the equivalent of a thermal fleece or rockwool and dramatically improved the thermal efficiency of the walls.
The existing single glazed windows were upgraded by applying a slimline glazed panel to the rear of the existing windows shaped to match the existing windows.

First Floor, 21 The High Street,

Chipping Norton, Oxfordshire
OX7 5AD

01608 692 310 / 07880 727 150