Tiling a curved roof requires a specialized approach that involves precisely modifying the dimensions of each individual tile to conform to the roof's unique curvature. The core principle for successful tiling on a curve is to adjust the width of the tiles progressively.
Adapting Tiles for Curvature
The fundamental technique for tiling a curved roof centers on altering the width of each tile to ensure it seamlessly follows the roof's contour while maintaining proper overlap and aesthetic uniformity. This critical adjustment prevents gaps or buckling and ensures a secure, watertight finish.
1. Tiling a Convex Curved Roof
For a convex face (where the curve bulges outwards, like the top of a dome), it is necessary to progressively reduce the width of each tile. As you move along the curve, each subsequent tile needs to be slightly narrower than the one before it to fit the diminishing space and maintain an even course line.
- Method: This involves cutting the sides of each tile at an angle that allows it to conform to the tightening radius of the curve.
- Goal: To prevent the tiles from splaying out and creating gaps at the top edge, ensuring a tight, continuous bond.
2. Tiling a Concave Curved Roof
Conversely, for a concave face (where the curve dips inwards, like the inside of a bowl), you must progressively increase the width of each tile. As the curve opens up, each subsequent tile needs to be slightly wider to fill the expanding space.
- Method: Similar to convex curves, this requires precise cuts to the sides of each tile, but in this case, the angles will be cut to allow the tile to fan out.
- Goal: To prevent the tiles from pinching together and creating large overlaps or gaps at the lower edge, maintaining a consistent reveal.
The Importance of Cutting and Bonding
The process for both convex and concave curves involves cutting the sides of each tile in order to keep to the curve and maintain bond. This is a precise task that often requires:
- Accurate Measurements: Each tile's cut must be specific to its position on the curve.
- Specialized Tools: Wet saws with diamond blades are commonly used for clean, precise cuts on roofing tiles.
- Skilled Workmanship: Tilers need expertise in calculating angles and executing precise cuts to ensure a perfect fit and long-lasting installation.
Comparison of Curve Tiling Methods
| Feature | Convex Curved Roof (Outward Bulge) | Concave Curved Roof (Inward Dip) |
|---|---|---|
| Tile Width Adjustment | Progressively reduce the width of each tile. | Progressively increase the width of each tile. |
| Cutting Action | Sides are cut to taper inward. | Sides are cut to splay outward. |
| Purpose | Prevents splaying and maintains tight top edges. | Prevents pinching and maintains consistent reveals. |
| Example | Dome, curved dormer, or barrel vault exterior. | Underside of an archway, recessed dome interior. |
By meticulously adjusting the width and angle of each tile, installers can create a durable and aesthetically pleasing roof surface that perfectly follows the unique contours of any curved structure.
