Causes of Rising Damp In London & Berkshire:
As many of the properties in London and Berkshire are older buildings rising damp is a relatively common problem for a few different reasons.
Edwardian and Victorian properties were more than likely fitted with a damp course at the time of construction, however many years have passed since then and the damp course may of deteriorated rendering it useless against moisture entering the base of walls. Properties built prior to the Edwardian & Victorian eras were most likely constructed without a damp course being fitted at all.
Many older properties have been extended or modernised, these extensions may not of been fitted with an adequate damp course or bypass the original damp course allowing moisture to seep in and the original property then becomes damp by proxy. Similarly the terrain surrounding your property may of changed quite a bit since your property was built, meaning if the ground level has been raised it may well now be above the level were the original damp course was, water can then make its way into the structures of the property.