A roof is a major investment, so it’s smart to do whatever’s necessary to make sure it stays in good shape.
 
Regular Maintenance
Regular inspection and preventive maintenance will keep small problems from becoming big ones. It’s smart to hire a roofing professional to check things out on a regular basis and perform all necessary maintenance.
 
If you decide to climb up there and check the roof yourself, there are a number of problems to look out for:

• Standing Water – When water is ponding on a roof, it means there is improper drainage and standing water can begin to cause damage. It may be necessary to install roof drains, or clear obstructed drains that are already in place.
• “Alligatoring” and Blistering — When cracks appear in the surface of a built-up roof, cold weather can create channels that hold water.