Thanks for youe views on practical ways to achieve root protection and car
access at the same time. I have ended up with a grid system in rigid polyprop
from Swiftec in manchester (tel 0161 XXX XXXX) and we are going to do a
monitored installation with the LPA Tree Specialist using a series of layers
of material and terram.
I get the impression that there are quite number of different systems out
there mainly derived from the old and somewhat discredited 'grasscrete'
system.
Again . Thanks for the input
Ken
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