1F felt for use under slates/tiles, 15m x 1m (Lansdown)

An unused, recently purchased 15m x 1m roll of non-bituminous 1F slater's felt (Cromar Protect). Very lightweight, like a roll of wallpaper. Non-breathable, so it's suitable for use where air can circulate underneath it, for example in an unheated outbuilding or other environment where insulation is either not required or is installed with an air gap.