Name the additional work rather than raising the frequency
The instinct is to increase the general cleaning frequency, which is expensive and imprecise. Construction dust behaves specifically: it settles on horizontal surfaces, arrives on footwear at entries, collects in matting, marks glass and accumulates on window ledges and sills facing the works. Those are the tasks that need to increase, not the whole schedule. The rest of the schedule is doing exactly what it was designed to do and does not need changing.
Write the uplift as a short list of specific additional tasks with their own frequency: entry matting lifted and cleaned more often, external glass and sills attended on a shorter cycle, horizontal surfaces in affected rooms wiped additionally, and floors in the entry corridor treated more frequently. That targets the actual problem and produces a much smaller cost than an across-the-board increase would. Reviewing which of those tasks is actually making a difference after a month lets the uplift be trimmed to what works.
