Tile gauge, especially when referring to roof tiles, is measured by calculating the exposed length of the tile when laid. Here's how you determine the actual batten gauge needed for your roof tiles:
- Measure the distance (A) from the first batten (eaves course) to the top course batten. This is the total length you need to cover with tiles.
- Determine the maximum tile gauge. This information should be provided by the tile manufacturer for the specific tile you are using. It represents the maximum recommended exposure of the tile.
- Divide the total distance (A) by the maximum tile gauge. The result gives you an initial estimate of the number of tile courses needed.
- Round the answer up to the nearest whole number (B). This ensures you have enough tile courses to cover the distance. (B) represents the number of tile courses required.
- Divide the total distance (A) by the rounded number of tile courses (B). The result is the actual batten gauge you should use. This ensures equal spacing and proper overlap for weather protection.
In summary, the formula is:
- Number of tile courses (B) = Round Up (Total Distance (A) / Maximum Tile Gauge)
- Actual Batten Gauge = Total Distance (A) / Number of Tile Courses (B)
Example:
Let's say the distance from the first batten to the top course batten (A) is 3 meters (3000 mm), and the maximum tile gauge for the tiles you're using is 300 mm.
- 3000 mm / 300 mm = 10
- Round up 10 (if necessary). In this case, it's already a whole number so B = 10.
- 3000 mm / 10 = 300 mm
In this example, your actual batten gauge would be 300 mm. This represents the exposed part of the roof tile.
Why is this important?
- Weatherproofing: Correct gauge ensures proper overlap of tiles, preventing water ingress.
- Aesthetics: Consistent gauge provides a uniform and visually appealing roof.
- Structural Integrity: The right gauge ensures the tiles are properly supported by the battens.
