monkeymad
Well-Known Member
I have a school which has sand mixed with plastic granules (it is about 4 years old). It was riding very firm as the sand had become very compact so we were advised to get a harrow with bigger spikes to loosen up the surface more. This worked very well, but in one section of the school we have got what I can only describe as 'bumps'. When running the harrow round the school in the car, you can really feel them as the harrow sort of bounces up and down over this particular section. Has anyone else experienced this and any suggestions as to what is causing this? Thanks.