Timber revolution: Social housing in Barcelona, Spain, by Urbanitree Digital Edition: Timber revolution: Social housing in Barcelona, Spain, by Urbanitree Social housing in Barcelona designed by Urbanitree –the tallest timber building in Spain – is evidence that socially just architecture is also the most sustainableThis area is reserved. Please register for a trial, or for full access to continue reading. If you are a subscriber, login here. Already a subscriber? Activate your digital account or log in to your account to read this storyCheck if you already have access from your company or university