Do you think your home has penetrating damp?

Penetrating damp can be witnessed in buildings of any age when there is excessive rain to face or older structures with porous bricks or blocked gutters and cracked roofing. Whichever the case, penetrative damp can bring about serious ill effects to the building as well as livelihood. Penetrative damp is nothing but rain water penetrating the masonry.

Penetrative damp Also known as rain penetration, it is caused by the horizontal movement of moisture or rain water seeping through the walls at random points at all levels of a building, forming isolated patches of dampness on external walls after heavy rain. Rain penetration affects poorly installed wall-ties or cavity walls, internal walls and buildings with solid wall construction.

Penetrative damp is mainly caused by a defective building or presence of porous bricks allowing water to permeate through the walls.

Mold on Ceiling
Mold on Wall and Ceiling
Water damaged moldy wall

Signs of Penetrative Damp

  • Damp patches at any level on internal walls that don’t dry
  • Deterioration of plaster and paint
  • Appearance of blisters, stain and salt
  • Timber starting to decay and rot
  • Skirting boards and window frames rotting
  • Mould growth on internal decorations
  • Damp as well as mould smell
  • Moss growth on external walls

Penetrative damp can be identified with watermarks or damp patches isolated from windows or doors at any height

High readings can be found on the moisture detector while its raining but can also show low moisture readings when its dry.

Fix the problem at once, call in the experts at London Damp Specialists on Outer London 020 8528 3864 or Inner London 020 7458 4864.

What causes penetrating damp?

Penetrating damp is rain water penetrating the wall horizontally that can be caused by blocked gutters, downpipes, and blown renders is common reason for penetrating damp, also window frames and roofs must be checked for decay, cracks or damage.

External basement and retaining walls must be protected from constant moisture intrusion by tanking treatments and interior walls by a chemical DPC and waterproof renders.

Building defects such as faulty roofs or windows must be rectified with proficient builders.

How to treat penetrative damp

Penetrative damp treatment is more sophisticated than ever before.

Penetrative damp caused by poor cavity wall constructed and wall tie installation on the damp internal walls can be set right with damp proof renders.
Sometimes external walls have to be taken care of with weather resistant paints and coatings as well as water repellent creams and coatings. Blocked gutters and downpipes must be cleaned and cracked roof tiles must be repaired.

Breathable colourless water repellents allow moisture to escape rather than blocking them. Window sills and other water storage's must be cleaned from dirt, moss growth and leaves.

Cement tanking and render systems can be introduced to treat penetrative damp problems caused by high external ground levels.

Penetrating damp treatments can include:

  • Plaster removal
  • Salt neutraliser
  • Tanking Slurry
  • Waterproof render
  • Applying skim coat plaster
  • Applying new external render
  • Sealing exterior walls with clear waterproof sealer

All our work is covered by a no-quibble 30 year guarantee at no additional cost.

Penetrating damp is a serious, complex problem

Which is why 1000’s of home owners have used London Damp Specialists. If you need expertise and skilled Damp Specialists Book your free survey today or call us direct on outer London 020 8528 3864 or inner London 020 7458 4864.

What happens next?

Call us on 020 8528 3864, or 020 7458 4864 for Central London.

Alternatively, you can book a survey online by completing your details below.

Once you have submitted the form, one of our surveyors will be in touch with you to discuss your problems within 24 hours.

Your free, no obligation damp survey will typically only take between 15 to 30 minutes.

30 year guarantee We also offer a 10 year insurance backed guarantee.

Free damp survey No obligation survey with detailed reports and quotations

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