A radiant burner (1) which comprises at least one radiant burner plate (2) and at least two layers of radiant screens (3) enclosed by a peripheral band (4) associated with a body (6) defining a premixing chamber for said burner. The peripheral band (4) comprises an upper flange (5). The radiant burner further comprises an insulation (7) lying under and extending downwardly from said upper flange of said peripheral band. The insulation (7) has an internal peripheral structure permitting limited movement of the layers of radiant screens (3). The insulation is a multilayer structure wherein each insulation layer engages and supports at least one screenlayer (3).
