There is no single insulation type that suits every property. The correct solution depends on loft layout, access, existing insulation, ventilation, and how the roof space is used. A professional assessment ensures insulation improves efficiency without increasing condensation or moisture risk.

• Mineral Wool (Roll or Blanket Insulation)

Mineral wool is one of the most commonly used loft insulation materials. It is typically laid between and over ceiling joists to reduce heat loss. When installed to the correct depth and with ventilation maintained at the eaves, it provides effective thermal performance and good sound insulation. Issues can arise if it is compressed, unevenly installed, or blocks airflow.

• Loose-Fill Insulation

Loose-fill materials, such as blown mineral fibre, are used to top up existing insulation or reach irregular spaces. They can help reduce gaps but require careful installation to avoid uneven coverage or obstruction of ventilation routes.

• Rigid Board Insulation

Rigid insulation boards are often used where lofts are boarded for storage or converted into usable spaces. Boards provide high thermal performance in thinner profiles but must be installed correctly to avoid cold bridging and condensation risks.

• Insulation for Loft Conversions

Where lofts are used as living spaces, insulation is typically installed within roof slopes and walls rather than at floor level. This requires careful detailing to manage vapour movement, airflow, and thermal continuity.

Proofterior assesses the loft structure, ventilation, and moisture behaviour before recommending the most suitable insulation type and installation method for the property.