Many people that own a property have never had their drains inspected. Some don’t know if they have a soakaway or not. Whilst it is well documented about drains, can be a cause of damp issues I have never seen anything published in regards to a soakaway causing rising damp issues. I tend to find that a blocked soakaway can cause excess moisture to occur within a sub floor void, and can be the cause of woodworm, and even fungal timber decay like wet rot or even dry rot. I’ve seen many blocked soakaways cause rising damp issues, and even flooding of the cavity within the wall. It is imperative that when trying to solve a damp issue, is that you identify and fix the root cause before treating the symptom. Some really good info can be found about soak aways in BRE DIGEST 365, and Approved document H drainage and waste disposal.
Please see the video below where I explain about soak aways and go through some of the issues I find. Don’t forget damp issues can still occur because of drain defects, and even bodged up French drains.
If you need a professional damp survey you can contact me email@example.com and send me some info of your damp problem. Please be aware I don’t offer free damp surveys.