Moisture readings and drying for crawl spaces and cellars that took storm, flood or groundwater in a Suffolk home.
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Crawl space and cellar moisture is water or humidity held in the space beneath a house or in a basement, which can wet the joists, the subfloor and the lower walls. Suffolk Water Damage Restoration connects callers with a local crew, sent as soon as one is free, to take readings under the floor, remove the water and dry the space before the floor is closed.
The space under a house is the part of the building that most homeowners never see, and it is often the last place anyone checks after water has come in. A crawl space holds the floor joists and the underside of the subfloor, while a cellar holds the foundation walls, the mechanical equipment and often the stored belongings of a whole household. When water reaches either place, it can wet the structure above without any sign inside the living area for days.
In a storm, a crawl space can take water through its vents and its access door, and the ground around the foundation can push moisture through the walls and the floor. A cellar can fill from a backed-up drain, a sump that cannot keep up, or water that rises through the slab. In both cases, the wet material is out of sight, and the readings are the only reliable way to know what is holding water.
Suffolk Water Damage Restoration sends a local crew to read the crawl space or the cellar before the floor is closed or the walls are finished. The crew takes readings in the joists, the subfloor and the sill plate, removes the water and sets drying. The homeowner is told what the readings show before anything is covered up again.
Do not enter a crawl space or cellar with standing water, a sagging floor or a smell of gas. Keep electrical equipment out of wet areas, and do not switch on the power to a wet cellar until the panel and the wiring have been checked. Wear protection if you must enter a crawl space, because the air and the surfaces there can hold contaminants and mold.
The crew checks the access point, the ladder or the stairs and the light before anyone goes under the floor. Crawl spaces and cellars can hold standing water, live wiring and poor air, so the technician checks the power and the air before entering. Anyone who cannot safely enter is told to wait for the crew.
Moisture readings are taken on the joists, the underside of the subfloor, the sill plate and the lower foundation wall. The crew notes where the readings are highest and marks them, because the path of the water through the space shows where the drying should concentrate.
Standing water in the crawl space or cellar is pumped out, and any silt, debris or stored material that has been in the water is removed. The floor is cleared so air can reach the surfaces, and the vapor barrier is checked for damage or displacement.
Air movers and dehumidifiers are set in the crawl space or the cellar, and in the rooms above where the floor is affected. The technician checks the readings at each visit and reports the progress. The space is dried to the target for each material before the floor is closed.
The technician looks for the way the water got in, whether through a vent, a crack, a drain, the ground or the sump, and records what is found. Repairs to the foundation, the drain or the sump are outside the drying work and are referred to the appropriate trade. The log is given to the homeowner.
A crawl space sits below the floor, so water that enters it can soak the joists and the subfloor before anyone sees a stain above. The air in the space is also cooler and often more humid, which slows the release of moisture from the wood.
The joists and the underside of the subfloor are the materials most likely to hold water in a crawl space. They are wood, and wood takes on moisture from wet soil and wet air. If the water sits for a long time, the wood can swell, lose strength and begin to support growth.
Living space above a crawl space can look and feel normal while the framing below is still wet. That is why the readings should be taken from beneath the floor as well as from the room above, and why a homeowner who suspects a problem should ask for them.
A cellar is a full-height space with a concrete floor and foundation walls, and water in it can rise along the walls and stay in the lower part of the room. A crawl space is shallow, with wood framing close to the ground, so water can reach the structure more directly.
Water in a cellar tends to pool on the floor and wick into the bottom of the walls, the sill plate and the stored items. The mechanical equipment, including the water heater and the furnace, is often placed in the cellar and can be damaged by standing water.
A crawl space holds water in the joists and the subfloor, which are more difficult to read and to dry than a finished wall. The technician uses different readings for each, and the drying plan reflects the difference.
Look for standing water, damp smells, debris and staining on the walls and the joists. Do not enter a crawl space or cellar with standing water or a suspected electrical hazard. Photograph what you see and call the line, so the crew can take readings.
From the outside, look at the vents, the access door and the foundation for cracks, new gaps and debris pushed into the openings. Note whether the water appears to have come through the vents, the door or the walls, because that tells the crew where to start.
From the inside, check the sump, the floor drain and the water heater or furnace for water or moisture. Do not touch any electrical equipment in standing water, and do not switch on the power to a wet cellar until a technician has checked it.
A vapor barrier that has been torn, displaced or soaked may need to be repaired or replaced, but that decision is for the homeowner and a qualified contractor after the drying is complete. The crew reports the condition of the barrier and the moisture under it.
A vapor barrier on the crawl space floor slows moisture rising from the soil. If it has been torn or has moved, the moisture can reach the joists again after drying. The technician checks its condition and notes any damage in the log.
The crew does not repair the barrier as part of the drying unless the homeowner has asked for that work and it has been scoped and approved. The decision about ventilation and moisture control in the long term is best made once the space has dried and the readings are known.
Closing the floor over a wet crawl space traps the moisture in the joists and the subfloor, where it can support growth and decay. Readings confirm that the framing has reached its target before the floor is covered or the finishes are installed.
Once the floor is covered by new flooring or insulation, the wet wood is hidden and continues to hold moisture. A crew that checks the readings beforehand can prevent this, and it can explain to the homeowner what the readings show.
The readings are written into the log and kept with the job record. If the work is later reviewed by an insurer or a contractor, the record shows that the space was dried and checked before it was closed.
When water sits in a crawl space after a storm, the joists and the bottom of the subfloor stay wet while the living space above looks normal. The crew pumps the water, clears the debris and sets drying beneath the floor. The readings show when the framing has dried enough to close the space.
A cellar can fill when a floor drain backs up, when a sump cannot keep the water down or when the storm drains overwhelm the outside. The water is handled according to its source. The crew checks the lower walls, the stairs and the equipment, and it photographs the cellar before it is cleared.
Some crawl spaces have bare earth, and moisture can rise from it into the air and the joists. A cellar with a concrete slab can also show moisture coming up through the floor. The crew measures the floor and the wall base, and it recommends a vapor barrier or ventilation change only as a matter for the homeowner and a qualified contractor to decide.
A crawl space can be damp without any water on the floor, because humid air and poor ventilation keep the joists and the subfloor at high moisture. The crew measures the air and the wood, and it explains whether the readings are high enough to need drying and what would reduce the moisture over time.
Some homes here have crawl spaces or cellars. During heavy rain the ground around a foundation can become saturated, and water can find its way under the house. A crawl space can take water from the ground as well as from the storm.
The Nansemond River and the creeks that run into it can raise the groundwater in low ground, and in a storm the water can reach a crawl space through the vents and the access door. A technician checks the lowest part of the house first, because that is where the water collects and where the readings are highest.
A crawl space in a humid, rainy climate can stay damp for much of the year even without a storm, because moisture rises from the soil and the air holds it. Any readings taken after a flood should be read against that background, and the crew explains what the level is and what it means for the building.
Call any hour and explain what is going on. You get a clear price before any work starts.
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Not until the space has been checked. Standing water can hide wiring, debris and holes, and the air can be poor. A technician will enter first, check the power and the air, and tell you when it is safe to go under the house.
A sump that runs for long periods, a pit that fills quickly or water on the cellar floor after a rain can all point to a problem with the sump or the drainage. A plumber or drainage contractor should look at the sump itself, while the crew reports the moisture it found.
The crew dries the space and reports what caused the water to enter. Repairing drainage, grading, vents or the foundation is outside the drying work and is done by the appropriate contractor, which the crew can help you identify.
Yes, if the joists and subfloor stay wet for a long time, the wood can swell, weaken and lose its shape. A sagging or soft floor should be reported to the technician before anyone walks on it, and the crew will check the structure.
Wait until the readings confirm the cellar and its walls are dry, and keep stored items off the floor on shelving. Damp boxes and paper stored against a wall can hold moisture and encourage growth, so check them regularly.