2 x 12mm boards to get floor level with the kitchen floor. Take your pick of easily available 12mm material (Ply/MRMDF etc.)
Had to change the rest of my answer, I thought you were fitting a dishwasher!
Cheers
@hugo7 started
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2 x 12mm boards to get floor level with the kitchen floor. Take your pick of easily available 12mm material (Ply/MRMDF etc.)
Had to change the rest of my answer, I thought you were fitting a dishwasher!