Skew Fast


Density to Resist Sliding Loads

Below are the tables we use to calculate the density of Skew Fast that are required to resist sliding loads imposed on the roof. These are calculated using British Standard tables, and take into account the weight of tiles, the pitch of roof, the insulation thickness and whether there is a stop batten installed at the eaves level. The number that is found in the table corresponds to the number of Skew Fast required per square metre to resist sliding loads. Please note that wind loads MUST also be taken into account.

The first three tables below show the impact of using different insulation depths WITH a stop batten installed at eaves level.

Insulation Thickness 36-50mm (WITH STOP BATTEN)
Laid Tile Weight
kg/m²
Roof Pitch
20°30°40°50°60°70°80°90°
103.04.04.03.02.01.01.01.0
203.54.54.54.03.02.02.02.0
303.55.05.05.04.03.03.03.5
404.05.56.05.55.04.04.04.5
504.56.06.56.55.55.05.05.0
604.56.57.07.06.56.06.06.5
705.07.08.08.07.57.07.57.5
805.58.08.59.08.58.08.58.5
906.08.59.59.59.59.09.59.5
1007.59.010.010.510.510.010.510.5
Insulation Thickness 51-75mm (WITH STOP BATTEN)
Laid Tile Weight
kg/m²
Roof Pitch
20°30°40°50°60°70°80°90°
103.04.04.03.02.01.01.01.0
203.54.54.54.03.02.02.02.0
303.55.05.05.04.03.03.03.5
404.05.56.05.55.04.04.04.5
504.56.06.56.55.55.05.05.0
604.56.57.07.06.56.06.06.5
705.07.08.08.07.57.07.57.5
805.58.08.59.08.58.08.58.5
906.08.59.59.59.59.09.59.5
1007.59.010.010.510.510.010.510.5
Insulation Thickness 76-150mm (WITH STOP BATTEN)
Laid Tile Weight
kg/m²
Roof Pitch
20°30°40°50°60°70°80°90°
105.57.57.05.54.02.02.02.0
206.08.58.07.05.53.53.03.0
306.59.09.58.57.05.55.04.0
407.510.010.510.09.07.07.06.0
508.011.012.011.510.59.08.58.0
608.512.013.013.012.010.510.59.5
709.013.014.015.013.511.011.010.0
809.514.015.017.015.014.013.011.0
9010.015.016.018.017.016.014.012.0
10010.516.017.019.019.017.016.015.0

The second set of three tables shows the impact of using different insulation depths WITHOUT a stop batten installed at eaves level.

Insulation Thickness 36-50mm (WITHOUT STOP BATTEN)
Laid Tile Weight
kg/m²
Roof Pitch
20°30°40°50°60°70°80°90°
103.04.04.03.02.01.01.01.0
203.54.54.54.03.02.02.02.0
303.55.05.05.04.03.03.03.5
404.05.56.05.55.04.04.04.5
504.56.06.56.55.55.05.05.0
604.56.57.07.06.56.06.06.5
705.07.08.08.07.57.07.57.5
805.58.08.59.08.58.08.58.5
906.08.59.59.59.59.09.59.5
1007.59.010.010.510.510.010.510.5
Insulation Thickness 51-75mm (WITHOUT STOP BATTEN)
Laid Tile Weight
kg/m²
Roof Pitch
20°30°40°50°60°70°80°90°
105.57.57.05.54.02.02.02.0
206.08.58.07.05.53.54.04.0
306.59.09.58.57.05.55.56.0
407.510.010.510.09.07.07.57.5
508.011.012.011.510.59.09.59.5
608.512.013.013.012.011.011.511.5
709.013.014.015.013.513.013.513.5
809.514.015.017.015.015.015.515.5
9010.015.016.018.017.017.018.018.0
10010.516.017.019.019.019.020.020.0
Insulation Thickness 76-150mm (WITHOUT STOP BATTEN)
Laid Tile Weight
kg/m²
Roof Pitch
20°30°40°50°60°70°80°90°
1011.015.014.011.08.04.04.04.0
2012.017.016.014.011.07.08.08.0
3013.018.019.017.014.011.011.012.0
4015.020.021.020.018.014.015.015.0
5016.022.024.022.021.018.019.019.0
6017.024.026.026.024.022.023.023.0
7018.026.028.030.027.026.027.027.0
8019.028.030.034.030.030.031.031.5
9020.030.032.036.034.034.036.036.0
10021.032.034.038.038.038.040.040.0

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