The short answer
Remove Standing Water First
Begin by pumping or mopping out any standing water. Use a wet/dry vacuum for smaller areas and a pump for deep water in basements. Turn off electricity at the main breaker before entering flooded areas, and avoid touching electrical equipment while wet.
Wear rubber boots and gloves to protect yourself from contaminated water. Move furniture, rugs, and boxes to a dry area. The sooner you remove water, the less time materials have to soak in moisture. If the floodwater came from outside, treat it as contaminated and discard any porous items it touched.
Set Up Airflow and Dehumidifiers
Open windows and doors when the outdoor humidity is lower than indoors. Use box fans to push moist air out and pull drier air in. Place dehumidifiers in the wettest rooms and empty them regularly. Aim for a humidity level around 40 to 50 percent to discourage mold.
If you have a crawl space or basement, run a dehumidifier continuously. For large areas, you may need multiple units. The pros use high-capacity dehumidifiers and air movers to dry structural cavities. You can rent equipment from a local tool supply store, but for a large flood, professional help is often faster.
- Use fans to create cross-ventilation
- Run dehumidifiers in basements and closed rooms
- Open closet and cabinet doors to let air circulate
- Remove baseboards and drill holes in walls if needed
- Point fans at wet carpets and padding
- Empty dehumidifier reservoirs often
Dry Walls and Floors
Walls and floors hold water for days if left alone. Cut away wet drywall and insulation up to at least 12 inches above the waterline. Remove wet carpet and padding, as they trap moisture and grow mold quickly. Wood floors may cup or buckle; you can try to dry them with fans, but severe warping may require replacement.
For concrete floors, use a dehumidifier and fans to draw moisture out. Check for hidden moisture in studs and joists with a moisture meter, which you can buy at a hardware store. If you see mold starting to form, stop and call a mold professional before continuing. Drying takes time, so be patient.
When to Call the Pros
A large flood often requires industrial drying equipment that most homeowners do not have. The pros can set up specialized dehumidifiers, air movers, and moisture meters to dry walls and floors thoroughly. They also handle debris removal and disinfect surfaces. If the flood affected multiple rooms or the structure itself, professional help is a wise step.
The pros can also help with document drying and content pack-out if you have important papers or furniture. They work with your schedule and explain what they do at each stage. You can ask about their process and what equipment they use. For a flooded basement, they can pump water and dry the space completely.
Prevent Mold and Mildew
Mold can start growing within 24 to 48 hours after flooding. Keep the air moving and reduce humidity to slow it down. Discard items that are wet and porous, like mattresses, pillows, and cardboard boxes. Clean hard surfaces with soap and water, then disinfect with a bleach solution (one cup bleach per gallon of water) or a commercial cleaner.
If you smell a musty odor or see discoloration on walls or ceilings, treat it as a mold warning. Do not disturb mold patches, as that can release spores. Call a mold professional for testing and removal. Your health comes first, so wear a mask and gloves when cleaning, and see a doctor if you feel unwell.
- Throw out wet porous items
- Clean hard surfaces with soap and water
- Use a bleach solution for non-porous surfaces
- Keep humidity below 50 percent
- Inspect hidden areas like under sinks and behind walls
- See a doctor if you have breathing problems
Talk to someone now
Water keeps spreading into floors and walls, so it is worth acting early. Calls are answered 24/7.
Call Now (617) 404-2753Frequently asked questions
How long does it take to dry out a house after a flood?
Drying time depends on the extent of the flood, the materials, and the equipment used. With fans and dehumidifiers, small areas may dry in a few days. Large floods can take weeks. The pros use industrial equipment to speed up the process, but you should still expect a lengthy drying period.
Can I dry out my home without professional help?
You can dry small areas with fans and dehumidifiers, but a large flood often requires more power. The pros have high-capacity machines that remove moisture from walls and floors. If you have time and the flood is limited, do it yourself. For safety and thoroughness, professional help is often the better choice.
Should I remove wet drywall and insulation?
Yes, wet drywall and insulation should be removed because they hold moisture and grow mold. Cut them at least 12 inches above the waterline and discard them. If you leave them, you risk structural damage and health issues. Replace them only after the area is completely dry.