Andrew Kimberlee
Hi there would depend how deep the trench is but one thing is for sure a mortar based repair won't be a great use as the vibrations travel 2 Easley threw timber and causes it to break up. Future floor covering is key as well if you have Carpet more easer to hide ie double up underlay in that section vinyls Lvt etc mimic the surface they sit on and need to be spot on
