Here are some pics of a job we just finished in Pontiac, Michigan.

Roofing Before Pic:

The roof shingles had some decent visible damage, with most of the roof being tarped over to prevent leaking.

Repairing the Roof Decking:

Once we removed all the shingles off, there was plenty of damage to the boards underneath.   We removed any of the damaged boards and replaced them with new ones.

Completed Roof Installation:

Here are the pictures of the roof after the repair and installation.  The entire roof was covered with underlayment with ice and water shield 6 feet along the perimeter.