Metal Roof End Lap

How to lap metal roofing a basic rule of thumb for installing metal roofing is that the piece of roofing higher up on the slope should always overlap the one below it.

Metal roof end lap.

Cladco stitcher screws can be used at 600mm spacings down the sheet which will then consolidate the join between sheets with lapping tape between. The information has been gained through a study. The steel deck panels must have the same profile to be able to overlap. Side end laps benefit from mastic lapping tape and stitcher screws these materials provide a weather proof joint on side laps helping to protect the interior from the elements.

This comes following a study of built up and composite roofing profiles that are most commonly used in the uk. Mastic lapping tape can often be considered more effective than silicone sealants. Some shapes of steel deck profiles are not able to overlap. Cladco mastic tape should be installed along the crest of the sheeting.

Sealing of typical 150mm end lap and side lap details for metal to metal through fix built up and sandwich panel roofing systems and associated grp rooflight materials. This helps to prevent water infiltration. The overlapping of neighboring steel deck panel ends perpendicular to the flutes on the steel deck.