Deformable slat system

A deformable slat system for a building construction has one
or more deformable slats. At least one of the aforemen-
tioned slats has two slat parts which are joined
together in such a way that they are hingeable about a hinge
line. This slat is bendable and/or twistable in each first
position where the slat parts are hinged at a straight
angle or a zero angle with respect to one another and is
rigidified in each second position where the slat parts
are hinged at an angle differing from the straight angle or zero
angle with respect to one another. The slat system includes
means for bringing the afore-
mentioned slat selectively into a first or a second position,
and for bringing a slat , which has been brought into a first
position, into a bent and/or twisted position. Furthermore, a
slat is provided for a slat system of this type, and also a
building construction is provided with a slat system of this