a hole in the floor of the Garage was bugging me for ages.
but with always something to do to bikes and having the Garage cluttered with bikes didn't help with finding time and making space to tackle the hole.
with some bikes out of the Garage i finally had time and space! i bought a 25KG bag of sand, thinking it was more than enough and removed the tiles who were sunken down.
one hour later all 25 KG's of sand had gone in the hole and the floor was straight again..