The firm picked up prizes at the Flat Roofing Alliance awards this month for work at University Campus Suffolk, in Ipswich, and Hornton Court in Kensington, London.
The winner of the Best New Build was University Campus Suffolk's Waterfront Building, which nestles between heritage buildings and the contemporary development of the waterfront.
The 20 degs pitched oval green roof sweeps into view on the approach to the town centre. Work was carried out by Accurate Roofing, using the Bauder Extensive Green Roof system.
In the Refurbishment Green Roof category, Bauder's work on the Edwardian Hornton Court im-pressed the judges.
The green roof was designed to replicate the court's original gardens and was created by GRM Roofing Company using Bauder's Intensive Green Roof system.
Bauder managing director Andrew Mackenzie said: "It is particularly satisfying to win with University Campus Suffolk, a project that is local to us and acts as a daily visual testimony to Bauder and its achievements."