Single Lap Tiling ~ so called because the single lap of one tile over
another provides the weather tightness as opposed to the two
layers of tiles used in double lap tiling. Most of the single lap tiles
produced in clay and concrete have a tongue and groove joint
along their side edges and in some patterns on all four edges which
forms a series of interlocking joints and therefore these tiles are
called single lap interlocking tiles. Generally there will be an
overall reduction in the weight of the roof covering when
compared with double lap tiling but the batten size is larger than
that used for plain tiles and as a minimum every tile in alternate
courses should be twice nailed, although a good specification will
require every tile to be twice nailed. The gauge or batten spacing
for single lap tiling is found by subtracting the end lap from the
length of the tile.
Single Lap Tiling