Such matters should be considered when planting or removing trees or building new structures as certain tree species can affect foundations over 20 metres away.
Dylid ystyried materion o'r fath wrth blannu neu symud coed neu adeiladu strwythurau newydd, oherwydd gall rhai rhywogaethau coed effeithio ar sylfeini sydd dros 20 metr i ffwrdd.