The appearance of your commercial property shouldn't take a back seat to anything it terms of importance. Customers will form their opinion about your brand/business with this weighted heavily.
In buildings with two stories it is especially important to keep a close eye on potential leaks or mold growth. This particular photo is from a commercial property that had an upstairs bathroom. A pipe was leaking for some time prior to mitigation resulting in the very visible growth of water damage. This water damage was believed to be left untreated for several months and resulted in black mold growth.