Pinner Grove/Grove Avenue estate (Photo: Google Maps) The roofs of more than a dozen blocks of flats at a housing estate are set to be replaced to avoid “major problems” that could occur if they were left in their current state. Harrow Council confirmed it would install new roofs at 13 buildings covering 176 flats in Pinner Grove and Grove Avenue as part of its planned replacement programme for housing. The project, which will cost around £1.4 million, is expected to be completed by summer this year. It comes after residents living on the estate, which was built in 1949, pointed ...