TL;DR
Stop the source first, then get the water out fast -- the practical window is 24 to 48 hours from when the carpet got wet. Past that window, microbial growth is presumed rather than debated, and the pad comes out rather than being dried in place. A shop vacuum and a box fan are not water damage restoration, and a leak that ran for days is a job for that trade.
First: Stop the Source
Shut the valve under the sink, or the main if the local valve will not turn. Everything else is secondary until the water stops arriving.
Then clear the cabinet completely and leave the doors open. Under-sink leaks travel along the cabinet base, out the toe kick, and under the flooring, so the wet carpet you can see is usually smaller than the wet area you cannot. That cabinet space needs to dry too, and it dries much more slowly than open floor.
How Long Do You Have Before It Becomes a Bigger Problem?
The practical window is 24 to 48 hours from when the carpet first got wet. Within it, clean water on carpet is usually a drying job. Past roughly 48 hours, microbial growth in the pad and backing is presumed rather than tested for, and the standard response shifts from drying the pad to removing it. Source: IICRC S500 water damage restoration standard
That clock starts when the water arrived, not when you noticed. A leak that had been running quietly under a cabinet for a week is already past it.
Find the Real Edge of the Wet Area
Carpet wicks. The visible damp patch is almost never the full extent, because water spreads through the backing and the pad well beyond where the pile feels wet.
Press a folded white towel firmly into the carpet at intervals moving outward from the leak and check it for moisture. Keep going until the towel comes back dry, then add another foot. If you can lift a corner at the tack strip, do it and feel the pad, which holds far more water than carpet does.
Get the Water Out
Order matters:
- Extract, do not just absorb. A wet-dry vacuum pulls far more water than towels do.
- Lift the carpet if you can. Getting air underneath dries the pad far faster than blowing air across the surface.
- Move air across the floor, not down at it, so air sweeps the surface.
- Dehumidify. This is the step people skip and it matters most in a closed room.
- Keep going for days, not hours. Surface dryness is not dryness.
Airflow and dehumidification dry carpet. Heat alone does not, and a warm closed room dries more slowly than a cool room with a dehumidifier running. Water damage drying compared to a routine cleaning explains why these are different processes.
Why the Pad Is the Real Question
Carpet dries reasonably well. Carpet pad does not. Most residential pad is bonded urethane foam, which holds water like a sponge and releases it slowly through a layer of carpet on top of it.
That is why the honest answer to "can I dry this in place" depends almost entirely on how much pad got wet and for how long. A small area caught within hours, with the carpet lifted and air moving underneath, often dries fine. A pad soaked for two days does not, and drying it in place tends to produce a smell that shows up weeks later. What to do about a soaked carpet pad covers how to make that call, and why wet carpet starts to smell explains the delayed odor.
What a Shop Vacuum and a Box Fan Cannot Do
They can handle a small, fresh, clean-water spill caught within hours. That is a real category and it covers a lot of under-sink leaks.
They cannot dry a wall cavity, a subfloor, or a saturated pad under a large area, and they cannot tell you whether the structure underneath is still wet. Restoration crews use moisture meters, commercial air movers, and dehumidifiers sized to the space, and they document readings until the materials reach a dry standard.
If the water ran for more than a day, spread beyond one room, reached a wall, or came from anything other than a clean supply line, that is the trade to call. Drying wet carpet yourself compared to a restoration crew draws the line clearly.
Do Not Clean It Until It Is Dry
A common instinct is to shampoo the area afterward to freshen it up. Do that only after the carpet, pad, and subfloor are genuinely dry, because adding water to a partly dried area restarts the clock.
Watch for What Shows Up Later
Two things commonly appear a week or two after a leak that seemed handled. The first is a persistent musty smell, which points at the pad or subfloor still holding moisture. The second is a brown or yellow ring at the edge of the dried area, which is wicking -- soil and sometimes tannins from the subfloor rising through the pile as it dries.
The ring usually responds to cleaning once everything is genuinely dry. A musty smell means looking underneath rather than reaching for a deodorizer. How to check for mold under carpet covers what to look for, and mold remediation is a separate trade from carpet cleaning.
FAQ
How long do I have to dry carpet after a leak?
The practical window is 24 to 48 hours from when the carpet first got wet. Within it, clean water is usually a drying job. Past roughly 48 hours, microbial growth in the pad and backing is presumed, and the standard response becomes removing the pad rather than drying it.
Can I dry wet carpet myself with a shop vac and a fan?
For a small, fresh, clean-water spill caught within hours, often yes. Extract repeatedly, lift a corner of the carpet to get air underneath, and run a dehumidifier. That equipment cannot dry a wall cavity, a subfloor, or a large saturated pad, and it cannot confirm when materials are dry.
Does the carpet pad have to be replaced after a leak?
It depends on how much got wet and for how long. Pad holds water like a sponge and dries slowly under a layer of carpet. A small area caught within hours often dries in place with the carpet lifted. A pad soaked for a day or more is usually removed.
How do I find the real edge of the wet area?
Press a folded white towel firmly into the carpet at intervals moving outward from the source and check it for moisture. Keep going until the towel comes back dry, then add another foot. Water spreads through the backing and pad well past where the pile feels wet.
When should I call a water damage restoration company?
Call when the water ran for more than a day, spread beyond one room, reached a wall cavity, or came from anything other than a clean supply line. Restoration is a separate trade with moisture meters and commercial drying equipment, and it documents materials to a dry standard.
Why does the carpet smell musty a week after it dried?
Because something underneath is still holding moisture, usually the pad or subfloor. Surface dryness is not dryness. A persistent musty smell after apparent drying means looking underneath rather than applying a deodorizer, which masks the signal without addressing the cause.
A brown ring appeared where the carpet dried. What is that?
That is usually wicking. As the pile dries, soil and sometimes tannins from the subfloor rise through the fiber and concentrate at the edge of the wet area. It normally responds to cleaning, but only once the carpet, pad, and subfloor are genuinely dry.
See also: carpet cleaning services.
Every leak is different, so what your carpet needs depends on the source, the area, and how long the water sat. Get a quote and we will walk you through it.
