Molded ridge tile made of bitumen impregnated cellulose, and an application thereof

A method for covering a roof, comprising:

• applying a molded ridge tile (1) made of bitumen-impregnated cellulose to the roof, the tile being generally in a form of a section member having an elongate vertical plane of symmetry and comprising transversely a downwardly concave central portion (2) extended laterally and symmetrically on either side by two downwardly sloping plane flanges (3) so as to form an internal angle (α) between the flanges as measured on the concave side of the central portion, in which the central portion of the tile is placed to cover a roof ridge defined between two slopes (16) that form between them a ridge angle (γ), the flanges being applied flat against the two slopes of the roof,
• wherein on each side of the central portion, the connection zone between the central portion and the corresponding flange includes circularly arcuate rounding (14), and starting from a free configuration in which the ridge tile is not subjected to any stress and in which the internal angle between the flanges has a determined value, the tile is applied by deforming the internal angle between the flanges without deteriorating or destroying the tile, to a range of ridge angles (γ) extending from 90 degrees to 163 degrees, and in the absence of deformation stress, the internal angle between the flanges lies in a range 116 degrees to 96 degrees, so as to give a flange angle (β) relative to the horizontal that lies in a range of 42 degrees to 32 degrees.