Perhaps not the most impressive of churches from the outside, the 1814 stone Perp of Everton’s grade I Church of St George hides a cast iron structure inside, to the designs of John Cragg and Thomas Rickman – even JM Gandy might have been involved. Pevsner calls the galleried interior ‘a delightful surprise…light and delicate owing to the use of cast iron throughout.’ But its innovative design and almost flat patent slate roof – and failing ‘sealing putty’ – meant that over the years it fell victim to water ingress . As part of the recent refurbishment, Welsh Slate was brought in to work on the new overlapping Penrhyn Heather Blue slate panel detailing, including a sarking layer, laid to the original, shallow, seven degree pitch.

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