Material choice and a will for limpid, calm spaces dictated a language for this extension to a Victorian house in Dublin.  Board marked concrete was poured to walls, floor and  roof to form a textured tube across the original return, trapping a small courtyard behind. The materiality of the tube is underscored by circular rooflights which mark the passage of light on walls and floor. A splayed ramp tethers the new space to the ground floor of the house, linking in to literally pull the existing rooms out and up to the garden. Walls and ceiling are finished in a light, translucent wash, a wall lining  of black american walnut at one end forms a space which can be enclosed by pivoting a large black walnut door out from the wall.