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One of the most common causes of structural damage in buildings is penetrating damp, but it can also be one of the toughest issues to identify and treat.


There are several common signs of penetrating damp, which can help you to identify the problem and decide on the best course of treatment.

1) Damp patches on walls or ceilings: This is the most obvious sign of penetrating damp, and is usually caused by water leaking through cracks or holes in the external walls or roof. Damp patches may be small and insignificant at first, but if left untreated they can quickly become larger and more noticeable.

2) Peeling paint or wallpaper: If you notice that paint or wallpaper is starting to peel away from your walls, this could be a sign of dampness behind it. When moisture seeps through cracks in walls or ceilings, it can cause the adhesive that holds paint and wallpaper in place to break down, leading to peeling and flaking.

3) mold growth: Another tell-tale sign of penetrating damp is mold growth on walls or ceilings. Mold thrives in moist environments, so if you see any black or greenish-black patches growing on your walls or ceiling, this is a strong indication that there is dampness present.

4) musty smells: A musty smell is often another indicator that there is moisture present where it shouldn’t be. This could be due to mold growth, or simply because water has leaked into an enclosed space such as an attic or crawlspace.

If you notice any of these common signs of penetrating damp, it’s important to take action as soon as possible.


If you think you may have penetrating damp, the first step is to identify the source of the water. This could be due to external factors such as rain or leaks, or it could be internal factors such as condensation or plumbing issues. Once you have identified the source of the water, you can then take steps to treat the problem.

One way to treat penetrating damp is to use a waterproofing solution. This can be applied to both internal and external walls and will help to prevent water from entering your home. Another option is to install a damp-proof course, which is a physical barrier that will stop water from rising up through your walls. If you have an existing damp-proof course that is not working properly, it may need to be replaced.

In some cases, it may also be necessary to improve your drainage system. This could involve installing guttering or downpipes to direct water away from your home, or fixing any leaks in your roof.

It is important to seek professional advice so that any underlying issues can be addressed.

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