Profile: Tull & Darch specializes in the fabrication of custom designed PVCu (vinyl) conservatories and garden rooms. We provide a wide range of PVCu windows and doors. Twin hip edwardian conservatories are commonly used where the height of the host wall of the house is limited to 2-2.5m. This occurs commonly on bungalows. At the point where the conservatory fixes to the host wall, a structural gutter (box gutter) is incorporated in the construction. We produce a wide range of roofs for conservatories, sun rooms, pool enclosures and similar buildings.