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A material’s reaction to fire expresses its aptitude to burst into flame and thus contribute to the start and spread of a fire.

France has “M” classification, with 6 categories (from 0 to 5), defining material reactions to fire.

The following table gathers fire classifications depending on the dimensions of the exposed part of tiles and the tiles per se (40 cm. or 60 cm.):

  Tiles
40 cm
60 cm
  Exposed Part
> à 13 cm
> à 18 cm
18 cm
16 cm
  Fire Classification
M4
M4
M3
M3

40 cm. tiles

The following figure shows a cross-section of wooden tile roofing having M4 classification.

  • Installation is by triple-covering or layering.
  • The exposed part of the tile is greater than 13 cm. (16 cm.).

coupe bardeaux de 40 cm

60 cm. tiles

The following figure shows a cross-section of wooden tile roofing having M3 (CSTB Document N°RA99241) classification.

  • Installation is by triple-covering or layering.
  • The exposed part of the tile is greater than 18 cm.

coupe bardeaux de 40 cm

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