Is there an economical way to monitor the soil moisture next to my slab to prevent slab heave? House is 1 year old on class P site with stiffened raft slab, with some garden beds against the slab and split system aircons draining directly into ground.
Extensive googling hasn't turned up anything useful on soil moisture meters or any other way to monitor it.
I'm wondering if it's feasible to have some boreholes drilled to footing depth but somehow sided & capped to prevent it being a water ingress, that could be checked every 6 months?