Have I got this right?
There are conifers 6 to 8m high about 1m from the house?
Do you have any cracks in your walls? Any incidence of subsidence in the area, i.e., shrinkable clay subsoil? The trees are too close, they will probably suck moisture out of the ground in summer, the subsoil will contract and the foundations will crack. Ask the old gentleman whether he is insured for underpinning and making good. Painting the walls is not the problem.