In Surrey tile-hung houses are more common than in any other
part of the country. This use of weather-tiles is not very ancient,
probably not earlier than 1750, and much of this work was done in that
century or early in the nineteenth. Many of these tile-hung houses are
the old sixteenth-century timber-framed structures in a new shell.
Weather-tiles are generally flatter and thinner than those used for
roofing, and when bedded in mortar make a thoroughly weather-proof
wall. Sometimes they are nailed to boarding, but the former plan makes
the work more durable, though the courses are not so regular. These
tiles have various shapes, of which the commonest is semicircular,
resembling a fish-scale. The same form with a small square shoulder is
very generally used, but there is a great variety, and sometimes those
with ornamental ends are blended with plain ones. Age imparts a very
beautiful colour to old tiles, and when covered with lichen they
assume a charming appearance which artists love to depict.
The mortar used in these old buildings is very strong and good. In
order to strengthen the mortar used in Sussex and Surrey houses and
elsewhere, the process of "galleting" or "garreting" was adopted. The
brick-layers used to decorate the rather wide and uneven mortar joint
with small pieces of black ironstone stuck into the mortar.
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