UKTC Archive

Re: Water Demand of Cotoneaster

Subject: Re: Water Demand of Cotoneaster
From: Bill Anderson
Date: Sep 08 2017 09:31:23
My way of looking at this Jon would be you're already digging quite a deep
foundation because of the soil type. Assuming that a neighbour might plant
a tree with a high water requirement is only going to make 500 mm or so
difference, so why not get it right?

However I do accept your overall cost argument, I just wouldn't have
thought the cost difference would be that significant in the anticipated
life of the house. Let's not get into how screwed up the property market
might be.....

Bill.

On 8 September 2017 at 09:00, Jon <j.heuch@xxxxxxxxxxx.com> wrote:

.....   if you design a foundation that only considers trees that are
already present,
rather than trees that might be planted (and grown, and removed) in the
future, then it's not really an adequate foundation.
Getting these things right at an early stage is likely to be a relatively
minor cost in
comparison to future rectification. Innit?
It's an interesting point you make Bill but clearly the answer is it all
depends:
What does "get things right" mean? Digging a few centimetres deeper for
the foundation? Digging a metre deeper? Using different foundation designs?
Clearly there is an escalating cost, depending on how far you go and
remember you will need to do this for ALL houses in the appropriate soils.
150,000 homes per year at £1000 per house (for example) is not a relatively
minor cost for society at a whole.
It's all a case of balance and trade off. Is the current balance wrong?
Could it be improved? Considering a large proportion of subsidence claims
is on older houses where this discussion is irrelevant to a large degree
the focus needs to be on what problems occur on modern houses, taking away
inadequate conservatories and poorly designed and executed extensions.
Might a few million per year on pollarding/tree management/tree removal be
both cheaper and lead to a much better tree stock?
There's a research project for someone!
Jon




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