General installation rules
Clay tile roofs - Plain tiles

The types of tile covered by this document are defined, illustrated and characterized in paragraph 1 of the fascicule [C 3 520] .

Flat clay tile roofs are designed to be installed on supporting frameworks established in compliance with the rules and standards in force for such frameworks. In particular, the supports (usually rafters) for the battens must be flat enough. The flatness defect measured between three adjacent rafters must be, in line with the intermediate rafter, a maximum of 1/100 of the span between the end rafters.

The waterproofing principle of a clay flat tile roof is based on the fact that each tile is covered in the direction of water flow by two other tiles. This principle means that each tile is divided into three parts (figure...