This extension to a roof terrace in West London is inspired by the idea of living in the clouds. The geometry of the interior and the choice of materials all reinforce this experience, creating a soft sensuous master bedroom and bathroom that dissolves into the sky at the top of the house. If the nature of architecture is grounded, fixed, solid and permanent, then fabrics are its antithesis. Curtains, blinds, bedsheets, towels encircle the body: they dry, caress and darken. The project investigates how various spaces can be temporally created through semi-opaque curtains, changing how the space is used and perceived at different times.