Tiling Guidelines
TILING
Ascertain the mechanical fixing requirements as per the laying and fixing specifications (as supplied by your nearest Coverland Roofing branch). Roofs to be tiled in accordance with SANS 062.
Starting Tiling
Tile to the lines from the right-hand side, working towards the left, and moving upwards. Simultaneously secure the tiles as required, and install eave fillers where necessary.
All Coverland tiles should be laid "straight-bond" except for the Elite which must be laid "broken-bond". Full tiles are marked to facilitate ease of laying to the lines.
Mechanical fixing
Should be in accordance with the laying and fixing specifications. Where clips are used, they should be fixed to the battens. The clips should be at the tail of each tile - as close to the batten as the head of the tile beneath it permits.
Cutting tiles
Purpose-made cut tiles for use at hips and valleys are not manufactured because the position of the cut varies from tile to tile. Cutting of tiles is done on-site, either traditionally by hand or mechanically.
Valleys
Extra care should be taken with the valley construction because of its lower pitch in relation to the rest of the roof and the fact that it drains water away from the slopes. The small tile sections should be secured to the valley battens to keep the valley clear and unobstructed and prevent water from overflowing into the roof space.
CAUTION!
Sand, which is used as an aggregate in making concrete, contains silica which is released in dust when mechanical dry cutting of tiles is performed. Inhalation over a long period of time could cause silicosis.
It is recommended that a dust mask to a protection level of FFP3 and eye protection be worn as a safety precaution. Alternatively, wet cutting of tiles is recommended to contain the release of dust (see index).
Hips
The tiles from the two adjacent slopes should be cut closely and secured on the hip rafter to provide adequate support for the bedding of ridge tiles. Hip anchors should be used at the bottom edge of each hip rafter on steep pitches.
It is essential to fix all cut tiles carefully at hips and valleys to retain them in position. This can be achieved by using a kro clip or by using an adhesive such as Coverfill.
Open Valley
Once the valley battens have been positioned, a gutter is then formed in the valley using a suitable non-corrodible material. The fascia board is cut away so that no part of the valley gutter is raised above the fascia board when laid. The tiles on each side of the valley should be neatly cut to alignment and laid in such a way that they project over the side welt by at least 50mm. A gap of at least 50mm should be provided in the centre of the valley between the cut edges of the tiles.
Closed Valley
Proceed as indicated above, with the exception that the tile should be cut in order to form a neat butt joint in the centre of the valley. Best achieved by cutting one side completely, using a straight edge before starting the other side.
Useful tips
- Proceed as indicated above, with the exception that the tile should be cut in order to form a neat butt joint in the centre of the valley. Best achieved by cutting one side completely, using a straight edge before starting the other side.
- Materials or tools required should be carried up and not drawn or dragged over the roof. Materials stacked on the roof should not overload the battens, undertile membrane or roof structure, and should preferably be placed on the rafter lines.
- Care should be taken when walking on the roof. It is bad practice to walk up the valleys and hips. When walking on the tiles always step on the bottom middle of the tile.
