Loft Insulation Case Study — Wide Low-Pitched Loft Insulated in Stages, Swansea

The problem

Mark contacted us because the bungalow was expensive to heat and several rooms felt cold around the ceiling line. The wide loft had never received a complete insulation upgrade, mainly because the low roof pitch made access difficult.

The exposed floor and large perimeter meant heat was escaping across almost the entire footprint of the property.

Our assessment

The loft floor measured approximately 48m². We recommended a staged installation of 300mm Knauf glass mineral wool. Temporary boards were used to create safe working areas while the team installed 100mm between the joists and 200mm across the top.

The installation

The team began at the furthest edge and worked back towards the access point. The 100mm layer was fitted between the joists and cut around the vertical supports. Smaller sections were used in the low perimeter bays.

The 200mm layer was then cross-laid across each completed section. Temporary boards were moved as the work progressed and removed at the end. The eaves ventilation route remained open throughout.

The result

The completed loft had full-depth insulation across the wide floor area, including the previously difficult edge sections. Mark reported that the bungalow warmed more quickly and the rooms felt less affected by cold ceilings.