How long does it take for water to damage a floor?

Author: Opal Buckridge  |  Last update: Friday, June 20, 2025

Leaky pipes, storm floods, and plumbing problems are just a few of the many ways water can damage your flooring. After the onset of flooding, it only takes 24 to 48 hours to cause significant damage.

How fast can water damage floors?

Usually, it will take at least an hour or a full day for water damage to occur. If your house is affected by water damage, the three things that will develop quickly are mold growth, structural damage, and damage to your furniture or electronic appliances.

How long can water sit on floor?

Water can seep into walls, floors, and furniture, causing them to warp or rot. It can also damage electrical systems, leading to potential fire hazards. One of the most significant risks is the growth of mold and bacteria. These can start growing within 24 to 48 hours of water exposure.

How long does it take for water damage to show?

It can happen in just minutes if the leak is big. Water quickly gets into materials like drywall and flooring, causing them to swell, warp, and change color. But not all damage happens right away. Leaks that aren't fixed can cause big problems over hours or days.

How long does it take for water to damage subfloor?

If a leak or flood sits on your floor for 24 hours or more and/or reaches the edges of your floor and seeps underneath your flooring, it likely will need to be dried out completely. Usually, this will mean removing the flooring on-top of your subfloor.

If Your House Floods this is what will Happen to your Floor!

Is subfloor ruined if it gets wet?

A wet subfloor doesn't always need to be replaced, but it must be thoroughly dried and assessed for damage. Use fans and dehumidifiers to dry it out. If the subfloor is swollen, warped, or has mold growth, replacement is necessary.

How long does it take for wet rot to develop?

In general, when wood is continuously exposed to moisture and favorable conditions, it can start to show signs of rot in as little as a few months to a few years. In more extreme cases, untreated wood can completely decay within a decade.

How do I know if I have water damage under my floor?

If sections of your floor feel bouncy or soft underfoot, it could indicate water damage beneath the surface. This is often caused by prolonged exposure to water that weakens the subfloor, which can lead to costly structural repairs if left untreated.

What not to do after water damage?

Here's What Not To Do After Water Damage in Your Property
  • DON'T Use Electronics. ...
  • DON'T Clean Up Contaminated Water. ...
  • DON'T Leave Wet Items Together. ...
  • DON'T Redecorate Right Away. ...
  • DON'T Attempt To Fix Soggy Ceilings Alone. ...
  • DON'T Delay Getting Help. ...
  • DON'T Do It All on Your Own. ...
  • Final Reminders.

Does insurance cover water damage?

Most home insurance policies cover accidental and sudden damage caused by water. For example, a burst pipe that caused damage to a wall or floor would be covered. However, a gradual leak or seepage due to poor maintenance wouldn't be covered. Also, water damage insurance does not cover negligence.

How much water can cause floor damage?

Minor Damage (Less than 1 inch of water): Even a tiny amount of water, if left unaddressed, can lead to damage. It can cause wooden floors to warp, create staining on walls and ceilings, and provide an ideal environment for mold growth.

What happens if water gets under flooring?

The Risks of Water Damage

If water gets underneath the flooring, it can cause the planks to swell, warp, or buckle. This can result in unsightly gaps, a wavy appearance, or even a complete failure of the flooring. Water damage can also lead to mold growth, which can be hazardous to your health.

How long does water have to sit to cause damage?

In 1 day… Mold and other contaminants can start growing in as little as 24 hours and can spread to unaffected surfaces. Wood will start to warp, leaving hardwood floors damaged beyond repair. Paint and wallpaper will begin bubbling and peeling.

Is it OK to leave water on floor?

Leaving water standing on hardwood floors for an extended period is never a good idea. Water can penetrate the wood's surface, causing swelling, cupping, or staining. Promptly wipe up any spills or standing water using a dry cloth or mop to prevent damage.

How quickly does water damage foundation?

How Long Does It Take For Water To Damage Foundations? Water can compromise your foundation's strength in as little as 72 hours under severe conditions, though the process often takes months or years. The concrete damage usually starts subtly—hairline cracks slowly widen, creating paths for water seepage.

How long does it take for water damage to take effect?

Water Damage Within 48 hours up through 7 days:

Between hour 2 and the end of the first week, the damage will compound. Your home will experience growth and spread of mold and mildew. The doors, windows, and wood flooring may swell and warp, and metal may begin to rust and corrode.

How long does it take for a floor to dry out after a leak?

Don't be surprised if the meter still shows signs of moisture in the floor after a day or two. It can take up to several weeks for wood flooring to completely dry. Also, the humidity in the room and the amount of water that was present on the floor can prolong the process.

How much water does it take to cause damage?

Significant Damage consists of 2 inches of water or more. Extensive flooding can result in costly and severe structural damage and electrical hazards.

How long does water have to be on floor to cause damage?

Leaky pipes, storm floods, and plumbing problems are just a few of the many ways water can damage your flooring. After the onset of flooding, it only takes 24 to 48 hours to cause significant damage.

Will water under vinyl dry out?

If water or excess moisture is under your vinyl flooring, it is not likely to dry up on its own without leaving damage. In other words, you can't just ignore water under the flooring just because you have waterproof flooring. Excess moisture and water under the flooring can deteriorate and soften vinyl planks.

What does water damaged subfloor look like?

The most obvious is a spongy feel or “give” to the affected area. Other signs of water damage include warping in the floorboards of your hardwood floors, loose sections in your tile floor, bubbling or peeling in linoleum, lifting in your laminate flooring, or a musty smell that could indicate mold growth.

How long does it take for water damage to show on wood?

Water can start damaging wood within days to weeks, depending on the wood type and environmental conditions. Prolonged exposure accelerates the process.

What are the first signs of wet rot?

Wet rot can be identified through the following features:
  • Dark brown staining on the timber.
  • Splitting or longitudinal cracking along the grain of the timber.
  • A damp, musty smell.
  • Timber that is damp to touch.
  • Localised fungus growing on the timber.
  • The affected area is darker in colour than the surrounding timber.

How quickly does wood rot in water?

In general, dry rot can appear between 7 and 10 days after the wooden element has received enough dampness. If the spores are older, they may take longer to germinate. In terms of wet rot, establishing a regular timeframe for its onset is difficult since there are more factors at play.

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