Many homeowners often get asked by contractors what is water ingress and if it can be safely treated? This short article is going to explain the main issues involved with water ingress in commercial buildings, the potential causes, and how water ingress is typically treated by the property owner.ingress of water is one of the more common types of wetting occurring in commercial properties in the UK. It is important to understand this problem because it is such an important issue to be aware of. What are Water Ingress and How Can I Prevent It From Happening to My Home? One of the main reasons a plumbing system becomes the site of water ingress is poor installation. This may sound like common sense, but a lot of people try to go around this issue by installing inadequate drainage products, such as the French drains. These products are effective, but they can be easily turned around by inexperienced users. In addition, some improperly installed drains allow cold and hot water to leak into underground piping, which can eventually lead to the backup of freezing water which causes the pipes to burst. A leaky roof can also allow water ingress to occur because it will likely be leaking at one point or another. Another possible reason that your roof might develop leaks is faulty or deteriorating mortar joints. When water ingress occurs, the water will usually seep through the damaged mortar joints, leading to water damage. The majority of houses in the UK suffer from a lack of proper drainage due to the fact that the Victorian era houses were mainly constructed with wooden frames and these often did not have any waterproofing measures. Other examples of damaged mortars include Victorian glazing which was not replaced over time because of the cost, or the deteriorating mortar joints. As you can see, repairing or replacing damaged mortar joints is essential if you want to prevent the development of water ingress on your roof.