Knauf Aquapanel Interior, the specially developed tile backing board from Knauf Drywall, has eliminated tiling defects for a leading South West housebuilder and developer over the past five years, during which it has built nearly 600 dwellings. Torquay-based Cavanna Homes first used Aquapanel five years ago at Kernow Gate, a development of 35 houses in Launceston, and has used it …