Just been approached for a big pressure washing job on the exterior of a country mansion, they've already been quoted £15K for the job and are wondering if we can do it any cheaper.
The quote they have had is for hot pressure washing the exterior to kill off any future algae growth in the stone?
We've got a 4000psi Honda GX390 pressure wash (cold) how do I convert it to hot? Do I just need to put a hotbox in line?