Damp proofing a house


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Rising Damp

This is the general term for water that enters the fabric of a building by being absorbed from the surrounding ground into walls and floors - slowly causing damage to a property over a long period of time. This moisture often brings with it, groundwater salts and other contaminants that contaminate building materials and decorations.
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What is Rising Damp?

Ground water (moisture) that is drawn upwards through porous building materials such as bricks, mortar or sandstone. The speed at which the moisture rises up the walls will depend on several factors - the type of wall or floor construction, the nature of the ground and the environment inside and outside of the building. In most cases rising damp is a slow process and may be present in a building for several years before any signs of a problem appear.

Book a Damp Survey

We provide an extensive damp proofing inspection by a qualified surveyor who will assess and correctly diagnose the extent and type of dampness affecting your property. From this, we provide recommendations on specific damp proof treatments for the most effective ways to treat the damp problem in your particular property. Contact us on 0808 271 6905 for details on effective treatments for rising damp or book a survey appointment online.

Rising Damp Treatment

Our rising damp treatments are covered by a 30-year guarantee which can be passed on to future owners of the property.

    1. Survey – Through experience and knowledge of damp, a Rentokil surveyor will carry out the most appropriate rising damp treatment for your property, which will include the installation of a damp proof course.
    2. Installation of Damp Proofing – Dependant on the thickness of walls, holes are drilled in the mortar/brick of external and internal walls to a pre-determined depth and at the correct level and spacing between holes. These holes are then injected with a low odour water based silicone damp proofing fluid to reduce the movement of water through the capillaries.
    3. Damp Proofing Rod – An alternative system (where suitable) based on a high strength, liquid free, damp proofing formulation. These damp proofing rods are inserted into holes in the masonry without the need for an injection pump. As large amounts of fluid are not added to an already wet wall, the time it takes for the wall to dry is substantially reduced. This then allows quicker re-plastering and re-decoration. Also there is no risk of fluid spillage's which reduces the risk of damage to carpets or flooring.
    4. Re-plastering – Using a dense sand and cement render as a backing coat incorporating a waterproof additive. Once dry, a gypsum skim coat is applied to give a smooth finish.

Contact us now on 0800 0121 437 for details on effective treatments for rising damp problems.

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Rising Damp Treatment Testimonials

Rising Damp Treatment

"Everyone else wanted to remove 2 tones of plaster, do the work & rebuild the house (ok, slight exaggeration!) but as there was VERY little plaster damage Rentokil did it from the outside & only replaced what needed replacing. Top team, good tradesmen & a simple transaction."


Rising Damp

"From start to finish this was a good experience. The work was undertaken in a timely fashion with the minimum of fuss. A very efficient service."


How to Stop Rising Damp

Modern buildings in the UK include a damp proof course that acts as a barrier to water penetration. However, if some damage has occurred to the fabric of the building such as broken roof tiles, blocked air vents, leaking pipes or blocked drains, damp may then become a problem. Performing checks and carrying out regular maintenance to your property can prevent such issues.

We recommend these regular checks:

  • Ensure external roofs, gutters, down pipes and drains are clear from debris.
  • Repair broken or cracked roof tiles, leaking pipes, defective sealant around doors and window frames.
  • Maintain external ground levels at least 150mm below the damp proof course.
  • Keep all air vents free from obstruction.
  • Check for signs of dampness on internal surfaces of the ground floor walls and skirting boards.
  • Check walls behind furniture, curtains or sofas for any stain on wall coverings.