Root barriers
/Nearly all root barriers on the market, are not sufficiently deep to stop roots. They only deflect roots, some of which will go under the root barrier and exploit nutrients and moisture the other side.
Root barriers should extend down to where the soil is so dense that roots cannot penetrate.
We acknowledge that with subsidence it is the wicking across the soil of moisture that is needed by the roots is the issue and this blog post is not addressing this. The potential liability issues are huge. Suppliers and manufactuers of most root barriers are selling root deflectors. Insurers are accepting root barriers as a remedy to the problem.
We know of only one company that appears to install them correctly (and it is not us or related to us).