Resources for Landlords & Estate Agents

Approved Document F (ventilation)

The part of the Building Regulations for England that sets ventilation standards for dwellings. Since 15 June 2022 it requires that replacement windows do not reduce a home's existing ventilation.

Awaab's Law

UK legislation requiring landlords to investigate and repair damp and mould hazards within fixed timeframes — 24 hours to investigate and make safe emergencies, 10 working days to investigate significant hazards, and 5 working days to complete safety works once a hazard is confirmed.

Biocidal Treatment

Chemical treatment applied to surfaces to kill mould and fungal growth. Used as part of a mould remediation process alongside physical removal. Must be combined with structural or ventilation remediation to prevent recurrence.

Black Mould

Common name for dark-coloured mould growth in properties, most often Cladosporium or Aspergillus species. Can cause respiratory irritation and allergic reactions. Requires professional treatment when covering more than one square metre.

CSRT

Certificated Surveyor in Remedial Treatments — the primary professional qualification for damp diagnosis issued by the PCA. A CSRT-qualified surveyor has demonstrated competence in identifying and specifying treatment for rising damp, penetrating damp, and timber decay.

Cavity Drainage System

A below-ground waterproofing method that accepts water ingress through a studded membrane, directs it to a sump and pump, and discharges it away from the building. Classified as Type C waterproofing under BS 8102.