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Damp Proofing

damp proofingRising Damp

Rising Damp is where ground water which carries ground water salts by capillary action rises up through the building structure.

Rising damp can be successfully treated by injecting a silicon cream damp proof course in accordance to British Standard BS6576:2005 and carrying out specialist re-plastering to prevent existing salts from spoiling plaster and decorative finishes.


Condensation is caused due to the imbalance of heating and damp ventilation in today's sealed up houses i.e. (extra loft insulation, double glazing and wall to wall carpeting and cavity wall insulation.)

If a balance can not be found to prevent condensation i.e streaming to windows or mould and mildew to walls and fabrics within the building, we are able to install a range of products i.e positive pressure ventilation units / humidity controlled extractors / passive vents to correct control and reduce the problem to an acceptable level.

damp meterPenetrating Damp

Porous bricks and poor maintenance of properties i.e. (gutters, flashing etc) can lead to penetrating damp continuous water entering in through the structure of the building.

Once any internal repairs are carried out and external problems repaired, the property can be treated using an external water repellent if necessary.

This treatment still allows the walls to breath and can also help with internal condensation problems by reducing heat loss.

damp plasteringSpecialist Replastering

R & L Preservation will carry out re-plastering after a damp proof course has been injected. This entails removing the existing plaster which would be contaminated by ground water salts of which some are likely to be hygroscopic i.e. (attract moisture from the air).

Re-plastering is carried out to a 3 & 1 ratio of coarse sharp sand & cement render incorporating a waterproofer and salt inhibitor. Plastering is finished with a porous skim coat to allow breathing of new plaster which allows moisture to escape through evaporation.


Our Damp and timber works are guaranteed for a 20 year period from the date of completion (basements 10 years), and are registered to the property.  (ie There is no need to transfer ownership on sale of property - therefore no further hidden costs!).

For added secruity a guarantee protection insurance (IPT) can be added for each treatment with a small charge - prices on request.