§ Mrs. Margaret EwingTo ask the Secretary of State for Scotland what proportion of Dorran-type houses investigated by the Building Research Establishment were shown to be(a) suffering from current corrosion of steel enforcing bars, (b) sound, and (c) liable to structural defect within the next 30 years; and if he will give a breakdown of the analysis by district council area.
§ Lord James Douglas-HamiltonThe Building Research Establishment visually inspected a sample of about 100 Dorran two-storey houses and 30 Dorran bungalows in Scotland, and of these one house and one bungalow were examined in detail. Corrosion of reinforcement was found in the ring beam of the houses, but all houses and bungalows were found to be structurally sound at the time of inspection. All components tested showed carbonation of the concrete, and this condition could lead to corrosion of the steel reinforcement within the next 30 years.
Information is not available by district council area.