Rising Damp
| - Dampness or staining of internal and external walls, usually at ground level and up to approximately 1 metre
- Skirting board decay
- Rusty nails in the skirting board
- Wet rot to sub-floor timbers including joists and wall plates
- Damage such as flaking and blistering to plasterwork
- Salt deposits usually at ground level and up to approximately 1 metre
| - Missing physical damp proof course (DPC)
- Decayed physical damp proof course (DPC)
- The physical damp proof course (DPC) is lower than the surrounding groundwork
- The physical DPC may also be bridged by extensions or other forms of abutted wall or fence pillars
| may require: - Missing physical damp proof course (DPC)
- Decayed physical damp proof course (DPC)
- The physical damp proof course (DPC) is lower than the surrounding groundwork
- The physical DPC may also be bridged by extensions or other forms of abutted wall or fence pillars
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Penetrating Damp
| - Dampness or staining of internal and external walls. This can be present at any height and can propagate to ceilings
- Damage such as flaking and blistering to plasterwork
- Salt deposits on walls
- Timber decay
| - The most common cause is a loss of integrity to external building construction, including:
- Defective roofing
- Cracked render or brickwork
- Decayed windows and doors
- Defective guttering
| - General external building maintenance is always required
- Removal of plaster, sealing brickwork and subsequent replacement of render and finished plaster (frequent)
- Removal and replacement of affected skirting boards (occasional)
- Replacement of rotting subfloor timbers (occasional)
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Lateral Penetrating Damp
| - Dampness or staining of internal and external walls. This can be present at any height and can also propagate to ceilings
- Damage to plasterwork like flaking and blistering
- Salt deposits on walls
- Timber decay
| - A missing physical damp proof course (DPC)
- A decayed physical damp proof course (DPC)
- Raised soil levels or other building works adjacent to external walls
| - Removal of plaster and the installation of a tanking system (frequent)
- Removal and replacement of affected skirting boards (frequent)
- Where practical, removal of high external soil levels (occasional)
- Replacement of rotting timbers (occasional)
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Condensation
| - Staining to interior décor
- Black mould
- Musty odour
- Wetness on interior décor and windows
| - Inadequate ventilation and air circulation
- High moisture content in air within the home
- High-temperature fluctuations
| - Installation of additional subfloor boiler room air bricks (fairly frequent)
- Installation of ventilation system like humidity controlled electric air vents (fairly frequent)
- Installation of high-level air vents
- Installation of a positive pressure system
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