Hi, Darren,
Unfortunately, I agree with the advice you were given. It sounds like your 'Watereri' is doing what it does - grows slow for quite some time, keeping a semi-dwarf size and then eventually gets large over time. P. sylvestris can develop a taproot but the majority of its roots are horizontal, often within 20cm of the soil surface. A tree that size, with that type of root system so close to the house, is bound to cause structural damage. And upon removal, the eventual space caused by rotted roots could cause subsidence.
Kathy C
Replied: Tuesday 8th of March 2011 10:52 PM