Restoration
When the water got inside. Most roofers stop at the roofline, but someone still has to put the house back.
What this is. Roofing stops the water. Restoration is everything after that: wet insulation out, framing checked and dried, drywall, trim, paint, flooring. It's usually part of the same insurance claim as the roof, and it's the part homeowners get left holding when a roofer stops at the roofline.
How it runs
Tarp or emergency repair first. Nothing inside can be dried or rebuilt while more water is arriving.
Wet insulation comes out, framing gets checked and dried. Building over damp framing is how you get mold in a wall you just paid to close up.
Photographs and scope of the interior damage, submitted alongside the roof, so it's one claim rather than an argument later.
Framing, sheathing and subfloor where the water has compromised them.
Drywall, trim, paint, flooring, back to how it looked before the storm.
Same standard as a roof. It's finished when you say it's finished.

Why it matters
When the roofer does the roof and someone else does the inside, the claim gets split, the scopes do not match, and the homeowner ends up mediating between two contractors and an adjuster.
Doing both means one scope, one set of documentation and one point of contact. It also means nobody can blame the other trade for what went wrong.
This is genuinely unusual for a roofing company, and it's the reason a chunk of their work is restoration rather than just replacement.
Recent restoration work
Interior work after water got in, and full multi-unit renovations.



Straight answers
Usually yes, when the water came in because of covered storm damage.
Policies generally cover resulting damage as well as the roof itself. It has to be documented properly and submitted with the roof scope, which is the part that goes wrong when two contractors are involved.
Anywhere from a few days to several weeks.
Drying alone can take days, and building over damp framing causes worse problems than waiting. The scope is what drives it, not the size of the house.
Usually not, though it depends how much of the house is affected.
Most work is contained to the damaged rooms. If it isn't liveable, loss of use is often part of the policy and worth asking your carrier about.
Then it gets dealt with before anything gets closed up.
Mold needs water and time, and a slow leak provides both. Building over it hides it for a while and then costs far more to fix.
Free inspection covering both the roof and what the water did inside, documented as one claim.