We use asphalt architectural shingles.
It typically takes 1 day to complete for any standard roof. If you roof is really steep or 40 plus square then it can take 2 days to complete.
No, you can stay in your home while it is being replaced. It will be just loud and might give you a headache from listening to it all day.
Yes, just be careful to not damage your shingles if you're using a sharp tool or excessive heat on the ice.
They occur when heavy snow buildup melts during the day and then refreezes when temperatures drop overnight.
There can be a variety of reasons for this:
The two main ways for ventilation: