The traditional way of combating rising damp is to put in what's known as a 'physical' damp course. This involves taking mortar out of the walls and inserting a membrane continuously along a horizontal mortar joint. However, beware - this method can cause structural damage to the house. Another method employed to fix rising damp http://teplovskii.site11.com in Australian houses is called an 'injection' damp course. This involves drilling into the middle of the bricks at the base of the wall and inserting a silicone-based product that spreads throughout the walls, coating the sides of the pores and capillaries. This creates a 'repellent' layer to combat capillary rise without blocking the pores, which would inhibit natural vapour transfer.