You can install directly into the cinder block walls, but there are some variables you need to consider first. If the cinder blocks are not filled, you will need additional reinforcement because unfilled cinder blocks average only about an inch thick. There may also be additional items fasteners, concrete screws that should be utilized for reinforcement of the bench. For a more detailed answer, Innovis Corp is happy to help guide you through your installation. Please contact them at 800 382-9653.