Centralized design reduced the amount of expensive exterior wall construction, facilitated centralization of services, and minimized nurse staffing requirements by reducing travel distances.

The only light penetrating the basement workroom came through several narrow windows near the top of the exterior wall, slightly above street level.

One section of the factory's main exterior wall had already collapsed, leaving a pile of smouldering rubble.

I recently had the pebble-dash render replaced on an exterior wall.

For an air-source heat pump (£5,000-£8,000) you need space away from windows and neighbours to place the humming air conditioningsized unit on an exterior wall.