Treatment specialist Japanese Knotweed Control has been praised for its professionalism and expertise after completing treatment work for Willmott Dixon on a new property development in North London.<br> <br> Construction work at Waites House in West Hampstead involves the demolition of existing flats and the building of a new four-storey block of 55 flats comprising a mixture of social, rented and shared ownership properties.<br> <br> A pre-construction survey had identified the growth of Japanese Knotweed in a corner of the site on a boundary with neighbouring land, and Willmott Dixon appointed one of its approved sub-contractors, Japanese Knotweed Control, to carry out the treatment.<br> <br> Working to a very tight timescale, Japanese Knotweed Control excavated the knotweed and removed the contaminated material to a licensed landfill, thoroughly checking that no rhizome remained. A vertical root barrier was then installed at the boundary wall to prevent re-infestation of the client's land from a viable infestation on neighbouring land.