That's an excellent and very practical question! The short answer is: while many garden benches can technically sit directly on grass, installing a proper foundation is almost always recommended for longevity, stability, and safety. Let's break down the details.
Placing a bench directly on grass seems natural and easy. For a very lightweight, temporary bench, this might work for a season. However, you'll quickly encounter problems. The legs will sink into soft soil, especially after rain, causing the bench to wobble and become uneven. Constant moisture from the ground will accelerate rot in wooden legs and cause rust on metal ones. You'll also get an uneven seat that's uncomfortable and potentially unsafe.
For a permanent, stable solution, a foundation is key. Here are the best options:
1. Concrete Pavers or Slabs: This is a popular and effective method. Simply lay level, solid pavers where each bench leg will rest. This distributes the weight, prevents sinking, and lifts the wood off the damp ground.
2. Gravel Base: For a more permeable option, dig shallow holes for each leg, fill them with compacted gravel, and place the bench on top. This provides excellent drainage and stability.
3. Concrete Footings: For heavy benches or soft ground, pouring small concrete footings below the frost line offers maximum, permanent stability. This is crucial in areas with freezing winters to prevent heaving.
So, can you just place it on the grass? You can, but you shouldn't for anything meant to last. Taking a few hours to create a simple, level foundation will ensure your bench remains sturdy, level, and beautiful for years to come, making it a much more enjoyable and reliable spot to relax in your garden.