Grimy or stained walls, retaining walls and fences on your property can spoil the façade and decrease the value of your house if you are trying to sell or rent.
Partially or fully shaded areas may also develop mould and mildew, which is unsafe and may lead to pitting and surface erosion. Mould, mildew and algae commonly take hold on household walls and fences and can be toxic and present a hazard for your family and visitors.