Benz
you should include removal in your tender. If it's not asked for then add it on your quote as an recommended optional extra.
Most big refurb's i have done,the main contractor's strip everything out.
If it's replacing an old for new system on a working site,then it's standard for us to remove the old as it's normally asked for too.
Well, the sites we have been involved into commissioning, we have done so stage by stage, each time we commission part of the system the subcontractor remove the old stuff of that part to keep the site well protected, and every thing was run OK till the hand over, only the new system left on the walls and ceilings and in normal operation. But;
The sites we have taken over for servicing are really a different case, we did not fit them, systems have been upgraded several times and have a mixture of old and brand new stuff in the same system, some other old stuff are part of a dead system and that's were the confusion may take place, one of the NHS we are in charge of have i.e. three KAC sort of call points in the same landings area each call point belong to a different live system and as the building has so many departments, some departments have their own system linked to us one way, but they have got their own service company and that is the kind of sites I am talking about, the decommissioning of old stuff may take us days to strip them off... and that is why I am saying I am not ready to do so for free.