Side lap

Side lap

The overlap required for two adjacent building components to prevent the penetration of rain.

side lap

The amount by which one material (or tile, shingle, etc.) overlaps the adjacent one along its side or edge.
References in periodicals archive ?
The walk starts from the Millennium Stadium at midnight from Friday, May 4, beginning with a pitch side lap of stadium, into the city centre, then towards the Bay - six miles in total.
The upper layer has a longitudinally extending side lap and a lower layer of self-adhesive bituminous material is comprised of asphalt, filler and tackifier.
Rubber or neoprene washers are installed under fastener heads, and a tape or sealant is used to waterproof the panel side laps and end laps.