Air bricks are the multi-vent bricks that most houses contain to allow air to circulate in the building. They are usually 15cm or so off the ground, and surround the house at that level.

These are obviously an issue with flood water, and need blocking in those circumstances. Floodshield have our own range of air brick covers which like Floodshield itself, don't need anything permanent and ugly fitting in advance, and can be attached quickly and easily in case of a flood.