There are many things that warrant a roof replacement. You should be on the lookout for these significant factors and get your roof replaced before experiencing total roof failure.
Sagging ceiling - a sagging ceiling could mean a problem below the surface of your roof, compressed roof installation, or a broken joint deck.
A stained ceiling, mold, and bad odors - a stained ceiling, a moldy ceiling, and a ceiling producing odd smells are all telltale signs of water damage. Rainwater leaking through your roof can begin rotting the structure of your commercial establishment, thus weakening it and putting you in danger.
Bubbling or blistering on the roof surface - A poorly insulated roof can lead to a buildup of moisture, which in turn leads to water being trapped underneath the surface of the roof. This can lead to mold issues.
Standing or ponding water - Standing water is common, especially after a storm, but if the pool of water lingers longer than a few days, then you might have a drainage problem. Water resting on your roof for long periods of time can weaken your roof and penetrate it, contributing to a myriad of other problems.
Leaks in the attic after rain - If you come across any leaks in your attic, inspect the roof as soon as possible, because there is a good chance that it means your metal roof flashing needs to be repaired. Any kind of leaks are no good, as they can lead to mold and rotting of your commercial building structure.