Abstract: Means for and a method of erecting block drywall wherein the blocks, or bricks, are, for the most part, rectangular in appearance and each provided, on their undersides, with a longitudinal and centrally oriented cavity extending the full length of each block and leaving longitudinal, horizontal, contact areas on each side of the cavity for seating on an underlying block in a wall construction, the upper sides of each block being provided with a horizontal and centrally located protuberance extending the full length of the block, there being longitudinal seating areas along the top side of each block situated to cooperate with the underside seating areas on each side of a similar block seated thereon, the cavities and protuberances of the blocks constituting symmetrically opposed mating surfaces facilitating the staking of blocks, one upon another and slideable longitudinally with respect to each other in a vertical drywall construction, the blocks of each row may be provided with centrally located and horizo