SLABS IN DECREASING SCALES

CLADDING OF SPHERICAL CUPOLAS 

Roofing cupolas requires highly professional capability and experience due to the fact that work is done on surfaces that are curved both longitudinally and transversally, and the material, slate, is a rigid slab that cannot be adapted to the radius of curvature of the underlying structure, made up in most cases of cementitious material. For perfect waterproofing, each row must keep the same number of slabs so that the joints of the preceding rows are covered by the slabs of the following row, therefore the width of the slabs must decrease from the lower rows to the upper rows. To avoid placing slabs that are too narrow at the top of the cupola, the starting rows at the base must have quite wide slabs; considering that the slabs are normally set in areas that are very high and difficult to reach, the they must be securely fixed so that throughout time they will not loosen and fall off.

LEGENDA
Lastra di partenza = Starter slab
Lastra del primo corso = First row slab