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Case study

Loft Mould Treatment in Southampton

Mould treatment and ventilation checks in a low-pitched bungalow loft

Mould & condensation treatment 1960s detached bungalow Southampton
Professional mould treatment being applied to loft roof timbers in Southampton

What we found

  • Extensive black mould growth across the underside of the roof lining
  • Condensation staining and damp spots throughout
  • Inadequate ventilation for the loft volume
  • Insulation in good condition but moisture affected in places

The problem

The loft had a musty smell and black spotting across the roof lining, with condensation staining and damp spots through the low-pitched roof space.

Our assessment

The loft had poor airflow due to limited eaves ventilation and a tightly sealed roof construction. Warm, moist air from the home was condensing on the cold roof lining, creating the ideal conditions for mould growth.

The treatment

A professional biocide treatment was applied to all affected areas of the roof lining using low-pressure application equipment, with the timber rafters treated where growth had spread onto them. The low pitch meant much of the work was carried out from temporary boards laid across the joists.

The result

The treated lining and rafters were left clean and free of visible growth. The insulation was in good condition and was repositioned where it had been moisture affected. The limited eaves ventilation behind the condensation was recorded, with the improvements needed set out in writing.

The treatment helped to

  • Treat the affected areas of the roof lining
  • Treat the timber rafters where growth had spread
  • Clear visible growth from the low-pitched roof space
  • Reposition insulation that had been moisture affected
  • Record the limited eaves ventilation behind the condensation

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