Rising damp represents moisture that collects in the walls from the ground underneath. The water rises through the walls and affects them structurally. Damp can be a problem whether your walls are made of stone, block, or brick. There is more information on the subject on the gov.uk website.
How Rising Damp Forms
Water travels up the walls because of capillary activity. In other words, the water penetrates tiny holes in the masonry. The water stops moving up a wall once gravity stops the upward force created by the capillary activity. Therefore, rising damp reaches as high as 1.2 metres. However, salt deposits may be seen past this point. If the deposits are seen at a higher level, it is because of the presence of non-breathing materials such as renders, paints, or plasters.
Some of the Telltale Clues
If you have rising damp, you will usually spot it in the form of a yellowish or brownish stain across the lower part of the wall above the skirting board. The skirting board may also be rotted or damp. Damp can also affect the floor in the same way. If you see white deposits in the plaster, those are the deposits as mentioned earlier of salt. Often, black mould can also appear in the damp areas of a wall.
Who to Contact about Treating the Problem
When you see any of the above signs, you need to contact a company such as Injecta that specialises in taking care of damp. A company that specialises in treating rising damp often provides services such as dry rot treatment as well.
Types of Damp
Besides rising damp, damp may take the following forms:
- Dry rot
- Fungal decay
- Wet Rot
If you have not had a damp proof course for your home, you need to contact a professional in the business immediately. In some instances, your damp problem may not be due to rising damp; it may come from another source. A big clue that your damp is not rising damp is if the patches of damp are located more than one metre up the wall. Spots that are not uniformly distributed indicate that the damp is penetrating damp instead.
Addressing a Damp Issue
If a damp proof course or DPC is required, a physical barrier is inserted into the building’s fabric to prevent the passage of water from one area to the next. The DPC can be inserted on either a horizontal or vertical plane.
Different Treatment Approaches
Damp is one of the most persistent issues in a home. The three major causes of damp—rising damp, penetrating damp, and condensation—all require different treatments.
If salt deposits have built up, re-plastering may be necessary. An accumulation of hygroscopic salts in the plaster or underlying masonry can further attract moisture, leading to dampness or decorative spoiling. To prevent this from happening, damp proof professionals work to prevent the future passage of residual moisture through the home. Therefore, they may have to re-plaster a wall.
Whether you have a problem with damp, dry rot, woodworm, or wet rot, it is essential for the sake of your property and its members to remedy the problem right away. Count on a full-service company to address any damp issues immediately.