Abstract: A method of building refractory protection walls of furnaces, ovens or combustion chambers, notably but not exclusively for boilers for incinerating garbage and refuse, is proposed for protecting the hearth walls by means of a refractory wall (4) consisting of a plurality of shaped fire-bricks (5) each provided with at least one blind recess (6, 11) disposed at the level of the fixing means of the panel (1) to be protected which consist of fixing studs (7) projecting from the panel surface and adapted to engage the corresponding blind recesses (6, 11) so that each fire-brick (5) is suspended from these studs (7) and self-locked in position by at least the next overlying fire-brick.