What is damp?
There are many causes of damp. Most damp is caused by the ingress of moisture. Moisture ingress can be caused by leaking pipes, high water tables in the ground, water penetration from sprinklers, water seepage through window frames or water seepage through cracked walls. Damp can be detected by sight, smell & damp surveying equipment.
Why should damp be treated?
There is common belief that painting over damp resolves the damp problem. This is a MYTH. Finding the source of the damp & investigating the cause of the damp is CRITICAL. Treating damp without thorough investigation & proper diagnosis will only waste money. Trapped moisture in damp walls if not treated will divert into other areas making the damp problem bigger.
If not treated, Damp can be harmful to the structural integrity of buildings. There are various types of damp with different effects. Treatment for each type of damp therefore differs.
The following signs indicate that you may have some sort of damp:
- Damaged or rotting skirting boards
- Visible wet patches on the walls
- Salts appearing on the walls
- Blistering paint
- Paint and wallpaper peeling off
- Floor coverings lifting or visible damp patches
Types of Damp include the following:
- Rising Damp
- Penetrating Damp
- Lateral Damp
- Descending Damp
Possible causes and / or areas of rising damp:
- No DPC fitted
- Old Malthoid DPC starting to fail
- DPC Sheeting recessed into brickwork
- DPC by-passed by moisture rising in plaster
- Porous Facebrick
- Deterioration of Mortar
- Poor Plaster mix
- Sprinklers on walls
- By Passing of DPC
- Flower Beds
- Stepped Floor Levels
- Raised Ground Level
- Boundary Walls
- Moisture penetrates the substrate at the origin of the leak & travels downwards
- Leaking Roofs/Balconies
- Poorly Waterproofed Flashings & parapets
- Condensation problems in a shower will lead to Fungal Growth
- An extractor fan is advisable but if it is not switched on it fails to be effective. It also has to be of the correct size to cope with the volume of air in the room
- You may encounter similar problems in certain kitchens where there is insufficient air movement to disperse the hot air generated during cooking. Good extractor fans are essential under such circumstances.