Poor drainage can result in standing water which may lead to serious issues such as; erosion to the foundation of your home, flooding within crawl spaces, and puddles which can do long-term damage to your garden.
This is why it is important to ensure your property is fitted with sufficient drainage, especially in the wetter, winter months.
The main drainage issues are surface water and groundwater, the former can be alleviated by a well-placed surface drain in affected areas, while the latter can be combated with a trench or filter drain.