This section is from the book "Modern Buildings, Their Planning, Construction And Equipment Vol1", by G. A. T. Middleton. Also available from Amazon: Modern Buildings.
The plain tiles to be whole, even in thickness, square and free from cracks and blemishes.
Cover the whole of the roofs with approved red tiles, laid to a 3|-in. gauge, bedded in hydraulic lime and hair mortar, the eaves being buried in cement.
Provide proper plain hip and ridge tiles and proper tiles and half-tiles to break joint at verges and tilted double course at eaves. All are to be nailed with two copper nails to each tile. Make good to valleys with cement mortar.
 
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