Usually not. The standard renters policy pays for mold only when it grows hidden inside a wall, ceiling or floor after a leak the policy already covers, like a burst supply line. Mold from humidity, a roof that lets rain in or a flood is yours to deal with.
A renters policy is a list. Unlike a homeowners policy, which covers everything it does not exclude, the standard renters form (ISO's HO 00 04) pays only for damage caused by one of sixteen named perils: fire, theft, windstorm, a burst pipe and twelve more. Mold is not on the list. It can only get in through the back door of another peril.
That door is peril 12, accidental discharge or overflow of water from plumbing, heating, air conditioning, a sprinkler system or a household appliance. And the form closes it most of the way in the same paragraph: the peril does not cover loss caused by mold, fungus or wet rot unless the growth is hidden within the walls or ceilings, beneath the floors or above the ceilings.
So the test has two parts, and you need both. The water has to come from inside a pipe or an appliance, not from outside. And the mold has to be somewhere you could not see it. Black spots spreading across a bathroom ceiling from shower steam fail both.
The clause is narrow, but the money problem is the usual one. The base form settles your belongings at actual cash value, the price of a used version of what you lost. A six-year-old rug is not paid as a new rug. Replacement cost is an endorsement (HO 04 90), and most of the gap in the example below is that missing endorsement, not the mold clause.
The repair of the wall itself is not yours to claim. The drywall, the pipe and the remediation crew belong to the building, and the landlord's insurer deals with them. Your policy is for what you own.
A fitting inside the wall leaks for weeks. Mold behind the drywall ruins a wool rug and a bookcase that would cost $1,800 to replace. They are six years old. Deductible $500.
| Cost to replace | $1,800 |
| Depreciation, 6 of 10 years (illustration) | −$1,080 |
| Actual cash value | $720 |
| Deductible | −$500 |
| Estimated check | $220 |
The same loss with the replacement cost endorsement: $1,300. Run your own numbers