Home / Stairs Stairs Balusters and banisters See also Gaps between internal steps - treads should lock together - serious and urgent Stair treads off-level - subsidence in close or rot in timber supports to landing - serious Stair tread cracks - may be sign of serious problem Stair tread cracks - may be crack in previous surface repair Worn stair treads - resurface if hazardous Gaps between outside steps - mortar washed away or metal supports rusted Get updates by email We send occasional legal and technical updates My interest is as an: Owner Technical / Professional Property Manager