The gauge is the exposed section of tile when it sits on the roof ignoring the overlap with adjoining tiles.
Gauge roof tiles.
The supplier of the tiles should recommend the spacing up the roof between the battens known as the gauge this usually varies according to the size of the tiles the pitch of the roof and the degree of exposure.
The initial gauge for this roof happened to be 13 1 4 inches or 33 5cm measured from the top of one batten to the top of the next.
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How to space roof tiles set tile overhang into guttering set recommended tile overlap reveal the ideal batten spacing gauge.
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The gauge will be the spacing between your battens.
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The gauge is in fact the same as the margin which is the length of the tile exposed.
The gauge margin quoted by a manufacturer will be the minimum acceptable you will need to work out the gauge you actually require for your particular roof so that a full number of gauges span from the bottom batten to the ridge this will avoid ending up with a part tile at the ridge if you use the specified spacing.
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