Protecting the valley of a roof from leaves and vermin can be difficult.
Solerati recommend Kiwi Valley protection as the best in the world. The product is micro perforation of continuously corrugated aluminium with a huge ability to stretch into deep channels of the Cureva tile. The product has two strips of butyl adhesive down each side which grips securely to the tiles.
Rain water flows into the gutter and through the perforated holes and down into the valley.
Kiwi Valley lies on top of the tiles giving it the advantage of not having to be placed between two tiles that would then interfere with the water channels.
Other products that sit between the tiles will void the manufacture warranty, fail building code compliance E2 standards, and nullify the possibility of any water ingress insurance claims.