When a building sits below ground, water can easily penetrate the porous brick walls. During wet weather, the amount of water builds up and seeps through the walls into the basement. Persistent flooding can cause serious damage to the fabric of a building. The build-up of water can put pressure on the main structure, weakening the brickwork and foundations. Extensive damp and mould issues can recur. Even if your basement does not flood outright, if there is a consistent smell of damp, then there is an ingress issue that needs resolving before it worsens.