Slate, copper and tile roofs, which are on the upper end of the price spectrum, can last more than 50 years. Homeowners with wood shake roofs should expect them to last about 30 years, while fiber cement shingles last about 25 years and asphalt shingle/composition roofs last about 20 years, the NAHB found.

For new roof installation it might take from 3-10 days to complete. It varies depending on roof material.

If you have a standard homeowners insurance policy for all sorts of hazards, that's a piece of good news for you. Homeowners get reimbursed for roof replacement and restoration expenses. However, policyholders only get covered if the damage or destruction was provoked by a sudden calamity.

Not necessarily. Depending on the type of roof material, size and structure of the leak. It might be just a zone of the roof, not the entire roof.