L
Lincoln-tiler
invest in a pair off these. I had problems with my knees even when wearing knee pads, then I got these bad boys........ Alpro Ergonomic Knee Pads £48.50 in stock - next day UK delivery plus Tile Cutters and Tiling Tools
Mine wasn't no where as bad as yours but these might give you a bit more time on the trowel.
Mine wasn't no where as bad as yours but these might give you a bit more time on the trowel.