Start with your foundation type
| Foundation | How water usually shows up | What usually helps |
|---|---|---|
| Full basement | Damp walls, a wet floor edge, a white mineral crust on masonry | Gutters and grading first, then an interior drain channel and a sump pit if needed. |
| Crawlspace | Standing water, a wet vapor barrier, a musty smell, sagging insulation | Surface drainage, a vapor barrier and sometimes a small pit with a pump. |
| Slab on grade | Dampness at the slab edge, wet flooring, a warm or damp spot | Exterior drainage, and a leak check on the pipes under the slab. |
Foundation types vary in Morrisville, and we cannot read yours from town records. A staircase down from the main floor means a basement. A small access hatch in a closet, hallway or outside wall means a crawlspace. No access at all usually means a slab.
Ask for your own house's type before comparing quotes. A quote written for a full basement tells you little if your home sits over a crawlspace.
Is it groundwater or a plumbing leak?
A leaking pipe can look exactly like seepage. Cary's own guidance to customers is to lift the meter lid and see whether the indicator moves with every tap off, and that is the first test we run too. If it moves, the water may be coming from a supply line and not the ground.
A pipe leak keeps going in dry weather and often shows near the water heater, the washer box or a supply wall. Groundwater tracks the rain. Our leak detection work sorts the two out with a meter test and listening equipment before anyone digs.
Clues that point to groundwater instead of a pipe
- Water appears after rain and fades in a dry week.
- Moisture shows along the joint where the floor meets the wall.
- A white powdery crust, called efflorescence, forms on concrete or block.
- Several spots wet at once, spread around the perimeter and not near a pipe.
Fix the outside first
Most basement water starts as roof water. Gutters that overflow, downspouts that drop water at the wall and soil that slopes toward the house all push water against the foundation. A downspout extension that discharges several feet away, a clean gutter and a slope away from the wall cost far less than any interior system.
Some downspouts tie into buried drain lines, and those lines clog with leaves and roots. A line that cannot carry water backs it up against the foundation, which is where drain cleaning solves a problem that looks like waterproofing.
Interior drainage and the sump pit
When outside fixes are not enough, an interior system gives water a place to go. A channel is cut along the floor edge, perforated pipe is laid in gravel and the pipe leads to a sump basin. A pump lifts the water out through a discharge line to the yard. Our guide to sump pump service explains the pump side.
This work is loud and dusty, and it opens your slab. It manages water that reaches the wall. It does not stop water from reaching the wall, which is why we ask you to fix gutters and grading first.
Cracks are symptoms, not the whole story
A thin vertical crack that seeps after rain is often a candidate for injection with epoxy or polyurethane. A horizontal crack, a stair-step crack in block or a wall that bows inward may point to structural movement, and that is a job for a structural engineer.
We do not repair foundations. If a crack looks structural, we will tell you to call an engineer before spending on sealing.
Clay soil and why moisture can come back
The North Carolina Geological Survey says expansive shrink-swell clay soils occur in the state, with elevated occurrence in the Triassic basins and the Carolina terrane, and that a small amount of soil expansion can damage a foundation. The survey does not say what is under any one lot.
In practice, clay swells when wet and shrinks when dry, so cracks can open and close with the seasons. Photograph a crack with a ruler beside it and date the picture. If the crack grows, sticking doors appear or gaps open at trim, show that record to an engineer before treating the symptom alone.
Crawlspace and slab homes
In a crawlspace, take a flashlight and look for standing water, dark staining on the soil, wet insulation, a torn vapor barrier and rust on pipe hangers. Wear a mask and gloves, and do not enter a space you cannot crawl back out of. Photos from the hatch are enough for us to start.
On a slab, a damp spot that feels warm can be a hot water line leaking beneath the concrete. That is plumbing, not waterproofing, and the right step is slab leak repair rather than sealing the floor.
Standards for the drainage side of waterproofing
Interior drains and sump pits are plumbing under the 2024 North Carolina Plumbing Code, based on the 2021 International Plumbing Code (IPC). Structural and soil questions belong to an engineer, and we do not give structural advice.
Ask which standard each contractor's membrane or coating is rated to.
Call (919) 944-7281 and describe what you see, and we will say whether it sounds like groundwater, a pipe or a drainage fix.
How a waterproofing visit works
A visit is built around diagnosis before any sale.
- 01
Walk the property
We look at gutters, downspouts, grading and where water is entering, inside and out.
- 02
Test for a pipe leak
A meter test and a listen at likely pipes come before anyone proposes drainage.
- 03
Explain the options in order
Cheap outside fixes come first, then interior drainage and pumps, and we say what each can and cannot do.
- 04
Set a clear price
You get a clear price before work starts.
What changes the price of waterproofing work
No two wet houses are the same, so the price follows the cause and the access.
The cause of the water
A clogged downspout line costs far less than a perimeter drain.
Length of drainage
More linear feet of channel means more cutting, gravel and labor.
Sump basin and pump
A new basin and pump are separate items, and a backup adds more.
Access and finishes
Finished walls, stairs and stored belongings slow the work.
Exterior excavation
Digging along a foundation adds labor and landscape repair.
Insurance often excludes groundwater seepage but may respond to a sudden burst pipe, so ask your insurer how your policy treats each.
Questions we hear
We cannot say, and town records we checked do not tell us. Some homes have basements, some crawlspaces and some slabs. A staircase down means a basement and a small hatch means a crawlspace, so check yours before you compare quotes.
Usually the drain channel needs somewhere to send the water, and that is a basin with a pump. The exception is a home where water can drain away by gravity to daylight, which is uncommon.
No. A crawlspace usually needs surface drainage, a vapor barrier and maybe a small pit, while a basement may need interior drainage. The first step for both is finding where the water enters.
Not reliably. Paint can hide moisture for a while, but pressure from water in the soil pushes it off. Cause first, finish second.
No. We handle plumbing and drainage. A bowing wall, horizontal crack or stair-step crack needs a structural engineer, and we will tell you so.
Then it is plumbing, and we fix it. A meter test and a listening check come first, and they cost less than excavating for a problem that is not groundwater.