When is it ever necessary to use a metal strip or plate on a concrete house slab which in turn supports the outside brickwork? We have a metal strip jutting out at an approximately 15 degree angle. We were told by the builder that we should have it covered up for cosmetic reasons but we think the builder is trying to hide faulty construction as we and an independent builder can't see or understand the reason for the presence of this metal on top of the slab. Any suggestions would be greatly appreciated as we fear that this section of the house is not secure. It may be important to note that we have found window frames and door frames, walls etc out of square and are wondering if this could be a result of the slab being defective and perhaps too short in part. Help, please. We fear we have been conned.