Is it ok to bury concrete rubble under garden?
grantrhammond Posts: 11
I'm knocking down a garage in my garden. The builder has broken up the concrete slab but is stating the it should be ok to bury the rubble.
I'm less certain. A broken up concrete slab will contain a lot of alkaline. I'm also concerned about drainage.
If left, the rubble will be ~ 40cm below ground level. Part of the buried area will be turfed, part will be planted with flower beds.
What is the native soil like? If you weren't re-using the crushed rubble, would you need to import material to bring up levels?
As has been said, chose the plants with care for the situation
The soil in the general area is flint / clay. I have an allotment across the road from my house which was grass and compacted soil when I took it on. I have spent a lot of time pulling our rocks from the ground and improving the top soil. In the back garden there's a thick layer of topsoil in the beds, I guess below that there's a similar flint / clay subsoil.
I have the opportunity to ask the builder to take away the rubble or offer to pay for a bit more effort to do so. I'm concerned that if I don't, I'll live to regret it.
Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.
Yeah, I'd bury it. 400mm is fairly deep and if its crushed fine enough shoudn't be an issue. You may want to consider advertising it on freecycle (or similar). Sometimes other people will want a small amount of hardcore. I wouldn't, personally, want to cart it to the tip - too much like hard work - on both yer back & car.