A guide to installing Lineflex Fleece Backed EPDM membrane under tiles.
Carefully remove tiles and battens and place to one side.
Fold the felt underlay up and tuck under existing tiles.
Apply a thin coat of contact adhesive to the rubber membrane and lay board.
Allow both surfaces to dry and, starting from the bottom, mate together, working the rubber into any angle changes.
Reinstate the felt underlay and battens over the rubber.
Reinstall the tiles.