Damp Proofing

Rising Damp is a blight that can affect external and internal walls alike. The source of dampness, in this case, comes from groundwater. The bricks and mortar in the dry upper parts of the wall act like a wick and draws water upwards.Well maintained, well-constructed walls will have an efficient physical damp proof course (DPC)and are unlikely to possess dampness unless the damp proof course has in some way been compromised, for example:

A Compromised physical DPC due to age and/or original use of poor material
External materials.e.soil. Shinglerubbish against the external wall below and above the DPC
Existing DPC breached by home improvements ie addition of a porch, conservatory, adjoining wall etc.
Materials within the cavity of a cavity wall construction.
Once damp proofing course has been compromised remedial action is required as soon as possible,

the continued presence of dampness on the upper walls will lead to deterioration of brickwork an internal plaster, decor.
The internal plasterwork in the home can break down quickly when exposed to such dampness. Replacement of plaster is usually required to some degree. This generally involves removal of the existing salt contaminated plaster and render applying our own factory mix waterproof render and then skimming through the appropriate plaster.
Salt contaminated plaster should not be left in place, it will continue to absorb moisture created in the home and will frustrate attempts to correct the wall decor.
How to fix rising damp problems It is also important to remedy any other likely causes of damp that exist within the property, such as loose slates and tiles, defective flashings, poor gutters, downpipe problems, cracked render, defective pointing and damaged brickwork.
For rising damp and damp proofing treatment it is recommended to seek professional advice. Damp Proofing Direct will send an experienced surveyor to visit your property. The surveyor will outline the severity of the damp problems and how urgent the need is for a solution.
Our surveyor will explain the potential damp proofing treatments, costs, and alternatives. In this case, the primary objective is to deal with the dampness.
Where there are rising damp problems, Damp Proofing Direct will install the very latest in damp proofing technology. The chemical damp proofing course system introduces a concentrated formulation silane/siloxane ‘cream’ into the wall, which forms a barrier against rising damp.

Rarely can an effective damp proof course be installed without two steps being taken:

  • Insert a new DPC
  • Re-plaster the walls

Re-plastering is important to prevent salt migration, and a special salt retardant plaster is needed. Common faults include using the wrong plaster and taking the wall plaster down over the dpc. New plaster must be taken significantly higher than the last signs of salt or rising damp.

For more information or to arrange a free survey call: 01442240567