In the name of environment, architecture is becoming exclusionary and so alien in its surroundings. By abandoning a wall as a full-contact arrangement of different materials, a set of membranes defines new architecture. Traditional thick insulation layers might lower the operating energy, but at the same time consume extreme amounts of grey energy to produce and are highly unrecyclable. The idea aims at addressing the problem of energy use in buildings at its core: The size of heated space in combination with the production costs. Thermal isolation as such is obsolete, but its functioning principle of the entrapped air between the membranes provides for thermal performance. What is more, this performance is adoptable, as the size of space can vary in accordance with outside conditions. Through thermal gradation it introduces realistic adoptability, better recyclability and cheaper m2 prices of buildings. By turning thermal insulation into a spatial quality we can inhabit the wall!