Broader and Deeper Water Course

Lama Roman’s moderate width water courses allows a higher volume and flow of water. This added water dissipation capacity is critical especially during heavy rain falls therefore preventing flooding, which may lead to water leakages.

Lama ROMAN Tile Specifications

SHUNT TOLERANCE IN INSTALLATION
The overhang on the left hand verge can be corrected using the full tiles by opening or closing the side lap between the tiles. Lama ROMAN Tiles allow a total SHUNT tolerance of 2mm in side lock for adjustment.
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Should the overhang of the tile be inconsistent between rows or columns, set out roof along eaves starting with the correct over hang at the right hand verge. The overhang on the left hand verge can be corrected using the full tiles by opening or closing the side lap between the tiles. Lama ROMAN Tiles allow a total  SHUNT tolerance of 2mm in side lock for adjustment.
Note: There should be a recommended shunt tolerance of 0.7mm-1.2mm Shunt clearance at the coverlock and underlock interlocking.

Insufficient Shunt clearance (Shunt In of less than 0.7mm) will result in tile breakages at the cover locks when accidentally stepped upon.
Why Do Corners Of The Tile Break At Their Interlock Edges After Installation? 
The corners of the tile, especially at their cover lock areas, are the thinnest part of the tile and as such are the most prone to damages.
If the tiles are not aligned or laid properly on the roofing tile, there is high potential for point loading that will put irregular pressure onto the corner of the tile, causing it to fracture or break.
This happens most frequently when the tiles are laid too tightly together.
If this Shunt is not maintained, damage from foot traffic or the thermal expansion and contraction of the roofing tile deck may result. Note that any debris left in the water channels during installation, creating a gap in between the interlocks could also result in point loading that may break the corners under foot traffic.

Lama ROMAN Interlocking tiles should be laid as close to Mid Shunt (A), as possible but may be Shunted In or Shunted Out (B and C) to gain or deduct some tolerances. The tiles however, should never be Over Shunted (D) as it will lift the tiles and stress or crack at the interlocks.

WALKING ON THE ROOF – POINT TO STEP
The weight of a person standing on the roof as well as the weight of the tile itself is supported by the battens of the roof just beneath the suggested stepping point.
(*) To download the full copy of installation guide please proceed to DOWNLOAD
When moving around on the roof, please ensure that safety is of concern and should be done with extreme caution.  Tiles breakages may occur if the roofing tile are stepped on the wrong areas. These damages may extend to damages to the house or building via broken debris or infliction of personal injury. The stepping pressure point of the tile should only be applied to the Headlap / Head Overlap  areas, near the nose of the tile. In any event, please avoid stepping on the Coverlock / Overlock  as there are tendencies for this part of the tile to break if excessive load is applied to and please avoid stepping on the centre of the tile which is not supported by the roofing structures.

STEPPING POINTS FOR TILES LAID IN A CROSS BOND OR STAGGERRED METHOD: 
The weight of a person standing on the roof as well as the weight of the tile itself is supported by the battens of the roofing tile just beneath the suggested stepping point. This point is where the load is distributed to near the bearing points of the tile. Stepping on other points may result in the tile breaking, cracking or developing a hairline fracture which may cause leakages further down the line.