Yes, tile drainage can be installed in heavy clay soils. In fact, heavy clay soils are often some of the most suitable soils for tile drainage, as they can be prone to waterlogging and can have poor soil structure. Installing a tile drainage system can help to remove excess water from the soil, reducing the risk of waterlogging and improving soil structure. This, in turn, allows for more effective crop cultivation and can increase crop yields.

However, installing tile drainage in heavy clay soils can be more challenging than in other soils due to the high clay content and compacted structure of the soil. This can make it more difficult for water to flow through the soil and into the tiles, so it may be necessary to install the tiles at a shallower depth with a narrow spacing between tiles, and/or to use a different type of tile with larger perforations. It is important to work with a specialist in tile drainage to ensure that the system is designed and installed correctly for the specific soil type and conditions.

The depth at which tile drainage should be installed in clay soils can vary depending on a number of factors, including soil type, climate, and the specific crops being grown. In general, tile drainage should be installed at a depth that allows for effective removal of excess water from the soil while also avoiding damage to the crops or the drainage system.

For clay soils, the tiles are typically installed at a depth of 2.5 to 4 feet. However, the exact depth will depend on the specific soil conditions, such as the clay content, water table depth, and soil compaction. In some cases, it may be necessary to install the tiles deeper or shallower than mentioned to ensure that they are effective at removing excess water from the soil and are installed at an appropriate grade.

It is important to work with a specialist in tile drainage to determine the optimal depth for tile installation in clay soils. They will be able to take into account the specific soil conditions and design a drainage system that is suitable for the specific site.