SLE Cladding Limited

MITRING.
To avoid four thicknesses of sheeting at the junctions of side and end laps, it is necessary for two of the sheets at each junction to be mitred at the corners so that they lie in the same place

Mitres on P6 should be cut from a point 150mm up the vertical edge from the corner (or the amount of end lap) to a point 70mm along the horizontal edge, ie, the width of the side lap by the length of the end lap.

Mitres on the lining sheets should be cut from a point 75mm up the vertical edge from the corner (or the amount of the end lap) to a point 43mm along the horizontal edge.

Ideally the gap between mitres should be a minimum of 3mm to a maximum of 6 mm. Box mitres should be avoided. The mitred joint is covered top and bottom by the other two sheets and is thus weatherproof and unseen. (See typical mitring detail below.)

NOTE. Mitres must not be cut in situ.

MITRING LAYOUTS

The procedure for mitring the sheets for single and double slopes is indicated on the mitre plans below.

On double slopes with two piece adjustable close fitting ridges or cranked crown ridges one slope must be laid left to right and the other right to left

When cranked crown ridge pieces are used, both top courses of roofing sheets and cranked crowns should be mitred.

When using 2 piece ridges, the top courses of sheets and the ridges should not be mitred.