We also recommend having your French drain inspected with a camera before you begin any major landscaping project in the drain’s vicinity (e.g. putting in a pool or hot tub, paving a walkway or laying decorative stonework). This way, any eventual problem can be repaired right away without the added cost of digging everything up.
To carry out the inspection, we simply insert a special camera inside the French drain. However, the area surrounding the drain must be excavated first.