Get more from your slate investment.


Get more from your slate investment.

Increases wind resistance

The storm that struck the UK in October 1987 caused a massive amount of roof damage.* It was a seminal event that led to a re-evaluation of roofing standards and designs. BRE report BR138** pointed to suction loads as a major cause of damage to slates and other roofing materials.

SlateSpacer™ reduces suction loads on slates.

Suction loads

As air flows over the roof's ridge and verge (gable) it tumbles and creates turbulence. This creates suction loads as a zone of low pressure exerts uplift forces on slates and other roofing elements.

Uplift forces on slates are reduced when air is drawn through the roof assembly. Studies have shown that air-permeable assemblies (slate and tile) allow a limited amount of air to pass through the tiny spaces between adjacent elements. The bigger the gaps in the array of slates, the less suction load is taken by the slates themselves.

With SlateSpacer™, installers and specifiers provide a controlled separation between slates (without reducing the rain resistance of the roofing system).

Testing conducted by BRE, in accordance with British Standard 5534, confirms that SlateSpacer™ reduces suction loads.




*The storm provided an unmatched forensic "opportunity", causing significantly more slate damage than hurricanes Hugo (Charleston, US, 1989) and Katrina (New Orleans, US, 2005).

**BRE report BR138 "The October Gale of 1987: Damage to buildings and structures in the south east of England."



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