There is a long history of residential segregation in Belfast, often defined by fear of the expansion of one community into the other. Two key planning strategies were developed by the state to deal with conflict within interface areas. The first being “wedge planning” which creates buffer zones by wedging in industrial and commercial land uses or transport arteries. The second “defensible space” creates defensible localities within communities by removing through roads. Together these policies have built in segregation not only between but also within communities and have had a detrimental effect on the urban fabric and further entrench divisions. It removes the opportunity for inhabitants to begin to share the same urban environment or public space. Building Initiative sees the use of temporary structure in the ‘yellowfield’ as a step towards ‘deterritorialisation. Could temporary installations be a strategy for the reactivating contested territory?