NO.77 BS 5250:2021 states that relative humidity should ideally be maintained below:

NO.78 When environmental factors (external temperature, solar gain, rainfall timing) affect damp diagnosis, the surveyor should:

NO.79 When diagnosing penetrating damp, the surveyor should assess:

NO.80 When condensation appears on windows, it typically indicates:

NO.81 Physical damp proof courses (such as slate or engineering bricks) are typically installed:

NO.82 Black mould (typically Aspergillus or Penicillium species) associated with condensation:

NO.83 Replastering after DPC installation should use:

NO.84 Internal treatments for penetrating damp (when external repairs are not possible) should:

NO.85 The height to which rising damp typically rises in a solid masonry wall without a DPC is:

NO.86 Building Regulations Approved Document C requires protection against moisture from:

NO.87 When conducting a dampness diagnosis, a surveyor’s primary legal duty under Common Law is:

NO.88 Mechanical ventilation systems (such as heat recovery ventilation) help control condensation by:

NO.89 BS 5250:2021 recommends that penetrating damp control should prioritize:

NO.90 Rising damp moisture typically originates from:

NO.91 A property has been treated with chemical DPC 6 months ago. The owner reports internal walls are still damp with visible mould. The surveyor investigates and finds: high salt content still present in plaster, inadequate heating in the property, and poor ventilation. The most appropriate recommendation is:

NO.92 The Health and Safety at Work etc. Act 1974 places responsibility for workplace safety primarily on:

NO.93 The most effective approach to treat penetrating damp is to: