My experience of the industry thus far has been mostly site work - The two ofus will first fix a 3 bed HA and pump up in a day then it'll take another dayto do all rads, sanitary ware, boiler and cylinder and a third day to fit the kitchen sink, fill up, fire up and final. Obviously we don't get to do it in three consecutive days with other trades needing to get in and gear not turning up on time etc. But these are the kind of schedules we have to work, especially in the lead up to Christmas (then we have naff all to do in January). There is a commissioning guy who comes round before CML and I believe he’s supposed to add inhibiter and balance the system, check efficiency etc. I’m pretty sure hedoesn’t do any kind of flush though, so there will be general muck and crap floating around in the system (we pressure test with dirty water from barrels outside, there will be jet blue, flux, grit and all sorts in there).
It’s like you say, the builders want it done cheap and the firm have knocked 12% off the old price we get. I think a boiler is £75, a cylinder is £130, rads are £11 each and sanitary ware is £30 per item so about £400 for a full second fix, less your 12%
I need to get myself off site work and on to privates. It’s just good to have something to fall back on, but I don’t want to get stuck with a load of bad habits.