* Designed to fix bitumen corrugated sheets, ridges and end pieces * Easy to install * Made with rainproof plastic caps * Applied to the crown of the corrugation * Fix every two corrugations These bitumen corrugated sheet fixing nails should be used when fixing bitumen corrugated sheets to timber sub-structures by fixing a nail fixings every two corrugation peaks peaks of the sheets in order to provide a waterproof fix whilst also allowing for water to drain down the troughs.