Installing permanent outdoor furniture on grass requires a stable, level foundation to prevent sinking, wobbling, and lawn damage. Simply placing heavy pieces directly on the turf will lead to problems. The best solutions involve creating a solid base that distributes weight evenly and allows for drainage.
A popular and effective method is using a gravel base. First, mark the area where the furniture will sit. Excavate the turf and topsoil to a depth of about 4-6 inches. Fill the bottom with a layer of coarse gravel for drainage, then top it with a layer of finer, compactable gravel like decomposed granite or sharp sand. Use a tamper to compact this layer until it is firm and level. This creates a permeable, stable base that won't shift with the weather.
For a more formal and solid surface, patio slabs or pavers are an excellent choice. Prepare the ground similarly by excavating and adding a gravel sub-base. Then, lay a bed of sharp sand, level it carefully, and set the slabs on top. The large, flat surface of the slabs provides exceptional stability for furniture legs, preventing them from digging into the ground.
For the most permanent and heavy-duty installations, such as a large pergola or built-in seating, concrete footings are the gold standard. This involves digging holes below the frost line and pouring concrete to create stable piers that support the structure's key points. This method ensures the furniture remains level and secure for years, unaffected by ground movement.
Alternatively, building a low-level decking platform is a great way to create a dedicated zone for your furniture. The deck structure elevates the furniture off the grass entirely, providing a perfectly level and durable surface while also improving drainage and enhancing your garden's aesthetics.
Whichever method you choose, the key is to bypass the soft, unstable topsoil and create a foundation that connects with the more compact earth underneath. This investment in proper ground preparation will ensure your outdoor furniture set remains safe, stable, and enjoyable for many seasons to come.