The present disclosure relates to a support assembly (10) for a self-containing cryogenic tank (12). The support assembly (10) comprises a first thermally insulating layer (14) and an impermeable layer (16) located at least partially above the first thermally insulating layer (14). The impermeable layer (16) is adapted to form a drip tray (18) for the cryogenic tank (12). According to the present disclosure, the support assembly further comprises a second thermally insulating layer (20) located at least partially above the impermeable layer (16), the second thermally insulating layer (20) is adapted to support the cryogenic tank (12).