the distance the leading edge of a slate overlaps the nail hole of the slate two courses below. Slate Terminology Diagam
Found on
http://www.encyclo.co.uk/local/20935
Shortest distance from the butt edge of an overlapping shingle to the upper edge of a shingle in the second course below. The triple coverage portion of the top lap of strip shingles.
Found on
http://www.encyclo.co.uk/local/21074
The minimum distance, measured at 90 degrees to the eaves along the face of a shingle or felt, from the upper edge of the shingle or felt to the nearest exposed surface.
Found on
http://www.rbroof.com/glossary-of-terms
No exact match found.
