fos biberdeckung

Fixing pattern

Storm safety of roof tiles

The fixing pattern outlines the area of tiles in the roof areas that require securing. If clipping is needed and the appropriate storm clip is determined by means of a wind uplift calculation, the tiles should not be secured randomly. The entire roof area must be considered to achieve the best possible protection. This is achieved by clipping each tile, or every second or third tile in a row (and all rows are offset diagonally), accordingly to the calculated laying pattern.

Tests have indicated that, in most cases, the clipping of every second tile with a sidelock clip produces considerably better results than if the head of each tile is mechanically fixed.

In special cases, the layout pattern will need to be customised to accommodate specific roofing materials.

Mortar bedding without mechanically fixing the tile will not provide the required wind uplift protection.

Regulations for securing tiles, slates, shingles and shakes may vary from country to country following the National Annex of EN 1991-1-4/NA.

Straight bond 1 : 1


FOS Straight bond 1 : 1

Straight bond 1 : 2 (SB 2 - 1)


FOS  Straight bond 1 : 2 (SB 2 - 1)

Straight bond 1 : 3 right (SB 3 - 2)


FOS Straight bond 1 : 3 right (SB 3 - 2)

Straight bond 1 : 3 left (SB 3 - 1)


FOS Straight bond 1 : 3 left (SB 3 - 1)

Broken bond 1 : 2 right (BB 2 - 2)


FOS Broken bond 1 : 2 right (BB 2 - 2)

Broken bond 1 : 2 left (BB 2 - 1)


FOS Broken bond 1 : 2 left (BB 2 - 1)

Broken bond 1 : 3 right (BB 3 - 2)


FOS Broken bond 1 : 3 right (BB 3 - 2)

Broken bond 1 : 3 left (BB 3 - 1)


FOS Broken bond 1 : 3 left (BB 3 - 1)

Beaver double-lap with the 425 on every
batten= D1


FOS Beaver double-lap with the 425 on every batten= D1

Beaver double-lap with the 425 on every
other batten= D2


FOS Beaver double-lap with the 425 on every other batten= D2

Beaver double-lap with the 425 on every
third batten= D3


FOS  Beaver double-lap with the 425 on every third batten= D3

Beaver crown tile roofing with the 425 on every
batten= K1


FOS Beaver crown tile roofing with the 425 on every batten= K1

Beaver double-lap with the 415c, each
beaver is secured 1:1


FOS Beaver double-lap with the 415c, each beaver is secured 1:1

Beaver double-lap with the 415c, each
beaver is secured 1:1, back view


FOS Beaver double-lap with the 415c, each beaver is secured 1:1

Beaver double-lap with the 415c, every
second beaver is secured 1:2


FOS Beaver double-lap with the 415c, every second beaver is secured 1:2

Beaver double-lap with the 415c, every
second beaver is secured 1:2, back view


FOS Beaver double-lap with the 415c, every second beaver is secured 1:2

Beaver double-lap with the 415c, every
third beaver is secured 1:3


FOS Beaver double-lap with the 415c, every third beaver is secured 1:3

Beaver double-lap with the 415c, every
third beaver is secured 1:3, back view


FOS Beaver double-lap with the 415c, every third beaver is secured 1:3

Beaver crown tile roofing with the 415c
and 415K FOS-Spezial


FOS Beaver crown tile roofing with the 415c and 415K= FOS-Spezial

Beaver crown tile roofing with the 415c
and 415K FOS-Spezial, back view


FOS Beaver crown tile roofing with the 415c and 415K= FOS-Spezial