  We study the model theory of countable right-angled buildings with infinite
residues. For every Coxeter graph we obtain a complete theory with a natural
axiomatisation, which is $\omega$-stable and equational. Furthermore, we
provide sharp lower and upper bounds for its degree of ampleness, computed
exclusively in terms of the associated Coxeter graph. This generalises and
provides an alternative treatment of the free pseudospace.
