What Causes Penetrating Dampness?
Penetrating damp usually occurs due to external building defects, such as defective guttering, blocked roof valleys, defective lead work, faulty seals around doors and windows, cracked and/or missing roof tiles, deteriorated pointing and damaged rendering. In many cases, the source of the penetrating dampness is clearly visible and can be repaired quickly and easily, which is why is it a good idea to regular check the external condition of your home. Other sources of penetrating dampness are less obvious and can take many years to manifest.
Penetrating damp can be identified by the presence of:
- Noticeable damp patches following heavy rain
- Damaged plaster and spoilt decoration
- Black mould
- Dampness around windows and door openings
Sources of damp ingress
This commonly occurs to walls which are exposed to the prevailing winds. Such as dampness is generally most visible during or after periods of heavy rain.
Faulty rainwater goods, such as gutters or down pipes, as well as defects to roof coverings, masonry work, pointing and external renders are also common source of moisture ingress. Hence an external inspection should be included during any investigation of dampness affecting external walls.
This is where the internal floor level is below the external ground level, i.e. the wall is wholly or partially earth retaining. Consequently, moisture from the ground will penetrate laterally into the walls unless isolated by vertical damp proofing membrane.
Usually, penetrating damp can be easily overcome by simply identifying the source of water ingress and tracing it back to its origin; once located the appropriate methods of repair can be carried out to prevent further deterioration.
Biocraft carries out a comprehensive range of damp proofing and damp control services throughout Berkshire, Hampshire, Surry and Oxfordshire.
Call 0118 945 1144 or email Info@biocraft.co.uk