Water in a crawl space or under a raised floor, read through the joists and the subfloor and dried from below and above.
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Water in a crawl space in Hammond comes from the ground, from a broken line or from a flood that reaches the lowest part of the house. The damage shows first in the joists and the subfloor above, and it can reach the floor finish long after the crawl space looks dry. The drying is run from below, with readings in every bay.
A crawl space is the part of the house most people never see, and water in it is easy to miss until the floor above starts to feel soft. The space holds the joists, the sill plates and the underside of the subfloor, and it is the path the water takes to reach the rooms above it. It also holds the ducts and the pipes that a leak can start in.
Crawl spaces in older houses on the low ground near the Little Calumet corridor can take water from the ground through a vent, a foundation joint or a broken drain. Where the floor is dirt, the moisture comes up into the air of the space, and the wood above it takes it in. The result is a damp house that smells of earth and a floor that cups or sags.
The work starts from below. The access is opened, the water is removed from the ground where it stands, and the readings are taken along each joist bay. The subfloor above is read through the joists, and the finish is only lifted where the readings show that the moisture has reached it.
Crawl spaces can have poor air, sharp debris and standing water with unknown contents. Enter with a light and a respirator where advised, do not work in standing water near wiring, and check the access for stability before going in.
The most common pattern in older houses. Moisture comes up from the ground and into the joists, and the wood above it takes up the damp. The drying is long, and the ground itself may need a vapour barrier.
Water that came in through a vent or a broken line stands on the ground for a time, and it soaks the lower parts of the joists and the sill. The water is removed first, then the wood is read and dried.
A crawl space with ducts or supply lines has a second concern: the leak may come from above, not the ground. The lines are checked for wet spots, and the readings are taken around them.
If it's an emergency, call now. For non-urgent crawl space water damage, send the form and we'll call you back.
It comes from the ground, from the outside through a vent or a gap, from a supply line or a drain above or below, and from a flood that reaches the lowest part of the house. Each source leaves a different pattern on the wood.
Water from the ground rises through a dirt floor, and it is worst after a wet spell. Water from the outside enters through a vent, a gap around a pipe or a broken foundation joint, and it runs to the lowest point. A supply line or drain that leaks in the crawl space puts water on the ground directly, and the wood above and beside it is the first to take it up.
The pattern is the clue. A line along the sill at the foundation suggests outside water, a stain around a pipe suggests a leak, and a damp floor across the whole space suggests moisture from the ground. The readings are taken with that pattern in mind.
The joists and the subfloor take up moisture from the air and from the wood below them, and that moisture reaches the finish floor above. The floor may cup, sag or stain even when the room above looks dry.
Wood holds moisture in its fibers, and it expands and contracts with the air around it. A subfloor that takes in damp from a crawl space swells at the seams, and the finish floor above it is pushed up. Hardwood cups, vinyl ridges and carpet feels soft over the same area.
The rooms above are checked from both sides. The floor is read from the top and the joists are read from below, and the two readings are compared so that the plan covers both.
A vapour barrier is a sheet laid over the ground in a crawl space to stop moisture rising from the soil. Whether one is needed depends on the house, the ground and the drainage, and that decision is made by the owner with a contractor.
A barrier that has torn, floated or been laid too loosely lets moisture through. A torn barrier is noted in the record, and its replacement is a separate job. A barrier does not fix water that comes in from the outside or from a broken line, and it does not replace the drainage around the house.
The restoration work does not decide whether a barrier is installed. It records the condition of the ground and the existing barrier, and the owner decides whether to ask for one.
The source, the framing, the subfloor and the finish may each need repair. Those repairs are made by the trades that own them, after the drying readings are complete.
A broken line is repaired by a plumber. A sill plate that has rotted is replaced by a carpenter who knows the framing, and the subfloor boards that have swollen or split are replaced. The finish floor is repaired or refinished after the readings show the wood is dry.
Closing the access too early is a common mistake. The readings should be dry for the full period in the plan before the crawl space is closed up, and the record should be kept with the rest of the house's file.
The crawl space access is opened safely and the space is checked for standing water, hazards and the source of the wet. The source may be the ground, a broken supply line, a drain or a flood that came through the vents.
Water is pumped or removed from the low points of the crawl space, and mud and debris are taken out so that air can move across the ground. A vapour barrier that has floated or torn is noted for replacement.
Each joist bay is read along its length, including the sill plate at the foundation wall and the underside of the subfloor. The readings show where the moisture has gone and whether it is still moving.
Air movers and dehumidifiers are set in the crawl space, aimed at the joists and the ground. The space is ventilated where that is safe, and the air is controlled so that the moisture is taken out rather than moved around.
The floor above is checked for cupping, soft spots and staining, and the finish is lifted in a section only where the readings stay high. The record notes what was found in each bay before the access is closed.
Houses on the low ground near the Little Calumet corridor, where the 2008 flood rose, are the ones where a crawl space is most likely to hold water from the ground.
A crawl space with a dirt floor and few vents is the layout where moisture collects, and the readings show whether the space is clearing on its own.
Not sure if you're covered? Check your ZIP code.
Water under the finish floor, read in the subfloor and joists, dried to its goal, then kept or replaced floor by floor.
Mold concerns after water damage, handled by drying the wet materials and asking clear questions about who does any testing or removal.
Rainwater that enters through the wall, the joint or the window well, traced to its path and dried in the wall and the floor.
Controlled air movement and dehumidification that run until the wall, floor and framing readings reach their dry goal.
Mold grows on wet building materials that stay wet for long enough, so the most effective step after a water loss is drying the materials to their goal.
Wood that has taken moisture from below swells and loses its strength. The readings from below show how far the moisture has reached, and the floor is checked from above.
It depends on the ground and the drainage. A torn barrier should be replaced, and the decision on a new one is made with a contractor who works on crawl spaces.
Often yes, because the drying runs from below. The floor is opened only where the readings stay high, and that is recorded.
Flood damage is generally excluded from standard homeowner policies, and water from the ground can be treated differently from a sudden leak. The policy and the insurer decide, so ask in writing.
It is common where the joists stayed wet for a long time. The mold section explains what to look for and what to ask before any testing.