QUALITY WITHOUT COMPROMISE
The only answer to this is that 'it depends'. Scaffolding is required for all but the smallest repair jobs and it will normally be erected in a day. A full re-roof of a terraced house would take 3-5 working days.
Probably not. All work is done from the outside of the building. As long as we have access to water and power (an extension cable through a loft window is fine) you can leave us to it.
Stripping your old roof covering is inevitably a dirty job. We can cover the contents of your loft with a tarpaulin, but if you are storing delicate or valuable items we recommend that you remove them before we start work.
As soon as your old roof covering is removed we install new underlay felt. Though primarily a form of insulation, it is sufficiently waterproof to keep your loft dry until the new roof covering is laid. If the Great British weather takes us by surprise, we always have tarpaulins to hand.