The imagined future discovery of new modular structures inside an existing one has won this year's West Fraser SterlingOSB Zero/RIBAJ competition

Ella Walklate, Reini Celmins, Alexander Vile and Adam Spreckley’s design is based on Glasgow's pigeon coops

Rob Annable and Justin Pickard's design focuses on SterlingOSB Zero’s very end-of-life material properties

Tom Birch and Elliot Nash’s design uses SterlingOSB Zero as shuttering for concrete and then to intervene on the resulting tower

The Retreat longlisted entries

This year's SterlingOSB Zero competition asked architects to design a country escape for up to 10 people

Latest: UNESCO World Heritage Site sustainable visitor centre

New facial and eye tracking tools aim to bring avatars to life

The UK’s first six-storey office with an entirely timber superstructure