We got a quote for having a ventilation system fitted in our house. It'll be a one-day job putting in a unit manufactured as standard by the same people who are fitting it, i.e. they are not ordering expensive parts.
They want 50% upfront and 50% on completion, is this normal? On principle I don't want to pay them anything till the job's done but won't make a song and dance about it if all firms do this.
It's a nationwide company with local franchises and the work will cost around £2k. Any advice would be appreciated.