1.-Fit wall liners Cut the wall liner to size minus 2mm, drill 5mm holes (in the centre of the width of the liner) 500mm centres, place liner in position, check it is vertical with a spirit level and pack behind the liner as necessary. Fix wall liner to wall with countersunk screws ensuring all the screwheads are flush with the surface of the liner 2.-Fit bottom liner Cut the bottom liner to size minus 2mm, drill 5mm holes (in the centre of the width of the liner) 500mm centres, place liner in position, check it is level and pack underneath as necessary, this is essential to ensure the smooth running of the doors. Fix bottom liner to floor with countersunk screws ensuring all the screwheads are flush with the surface of the liner