Key facts: Slab Leaks in High Pointe
- Lines under a slab can be reached only by cutting the floor, tunnelling or abandoning them for a new route.
- Rerouting in a two-storey home often means running lines through walls, closets and the attic, so the path needs planning.
- Cedar Hill requires state-licensed plumbers to register annually with the city.[1]
Where lines run
Which water lines usually run through the slab
It depends on how the house was plumbed, and practice differed between builders and years. Some homes have supply lines running through or under the slab to reach kitchens and downstairs baths, while others carry them overhead. Drains run below the slab in nearly every slab home, which is why a damp floor that only appears after someone showers upstairs points toward a drain rather than a pressure line.
You won't know your own layout without looking. Old plans may help, and a plumber can trace lines by testing them. Ask your neighbors with the same floor plan what they found, but don't lean too heavily on that, as sections differ and houses have been altered.
First signs
Where a High Pointe slab leak tends to show first
| Where | What you notice | Think about |
|---|---|---|
| Kitchen | Warm tile, cupped wood by the island | Hot line to the sink or dishwasher |
| Downstairs bath | Damp baseboard outside the bathroom | Supply or drain under the floor |
| Laundry | Damp at the wall behind the washer | Supply or drain connection |
| Living room | Damp carpet edge | A line crossing the room |
| Garage wall | Wet base of the shared wall | Line to the water heater |
The decision
Deciding on repair after the first slab leak
- 1
Get the leak confirmed
Ask how the plumber isolated it, and how sure they are of the location.
- 2
Ask about the pipe
Find out what it's made of and what condition it was in when exposed.
- 3
Compare two options
A spot repair and a reroute, with reasons for and against each.
- 4
Think about flooring
Consider what will need to be cut, and whether it can be replaced to match.
- 5
Think about future leaks
Ask what happens if a second section fails.
- 6
Decide once the water is under control
A few days of planning is reasonable if the leak is isolated.
Rerouting
What a reroute looks like in a two-storey house
A reroute abandons the buried line and runs a new one through the building. Two storeys can help or hinder. Lines can go up through a wall into the attic and back down, or across between floors where there's a clear path. Expect some small drywall openings and patching. Attic routes need insulation, because North Texas attics can freeze: DFW reached minus 2 degrees in February 2021.[2]
Ask where each new line will run, and how it'll be protected. A neat route through closets is often less disruptive than people expect, and it leaves your slab alone.
- Ask for the planned route
- Insulate attic sections
- Use closets where possible
- Plan for drywall patching
Floors
Downstairs flooring after a slab leak
The usual lower-floor finishes behave differently here. Laminate rarely recovers. Engineered wood may, if caught early, and its edges tell the story. Tile survives the water but hides it, so a contractor should test the grout and the walls next to it. Carpet is the easiest to deal with, because the pad can come out and the slab can then release its moisture directly. If you have layers, such as plank over old sheet vinyl, it's worth lifting a corner, because water can sit between the two.
Older adhesives and flooring can occasionally raise hazard questions in pre-1978 houses, so check your build year if there's any doubt.[3] Dallas Central Appraisal District records will show it.
Telling them apart
Is it the slab, or the upstairs?
A two-storey house gives you a useful test. If the damp appears only after water is used in one particular upstairs fixture, the drain or the wall below may be the cause. If it's there all the time and the meter moves, a pressure line is more likely. If it appears after a storm, look at the outside of the house. Writing down when it changes is one of the most helpful things you can do before the plumber arrives.
Your part
Your part before anyone starts cutting
- Do the meter test and write down the result.
- Take photos of the floor, baseboards and any warm or damp area.
- Mark the warm patch on the floor with tape.
- Clear furniture from the likely route.
- Check the attic hatch is reachable for a possible reroute.
Records
After the repair, and what to keep
Pressure-test the repair before closing anything up. After that, get the area mapped and dried, as explained in extraction and drying in High Pointe. Keep the plumber's report, photos of the exposed pipe, your meter notes and the drying readings together, because a future buyer may ask about them. See also slab leak water damage, the High Pointe page and signs of a slab leak.
While you wait
What to do with a warm patch while you wait
Turn off the water heater if a plumber advises it, and close its cold inlet. Keep rugs and furniture off the area so that the floor can be seen and felt. Take a photo with the tape line every day. If the patch grows, tell the plumber, as this helps show which way the line runs. It also gives you a record of the timeline if you make a claim later.
Garage
Check the garage side of the slab
Look at the base of the wall between garage and house as well. Water heater lines often pass here, and damp shows on the concrete first.
Tape marks
Keep the tape marks
Leave your tape marks in place until the plumber has seen them.
Questions
High Pointe slab leak questions
Does one slab leak mean the others will fail too?
Not necessarily. Some leaks come from a local defect or a rubbing point. Others show that the pipe is aging. Ask the plumber what the failed part looked like, and whether the same kind of pipe runs elsewhere in your home.
Is rerouting better than a spot repair in a two-storey home?
It depends. A spot repair suits a well-located leak in sound pipe, while a reroute suits repeat failures or floors you don't want cut. Two storeys may make routing easier or harder, so ask to see the plan.
Why is my downstairs floor damp when the leak might be upstairs?
Water travels down through walls and can come out at the base, far from where it started. See whether the damp changes when an upstairs fixture is used, then check your meter to separate a drain from a supply line.
Will my laminate floor survive a slab leak?
Usually not. Laminate's core swells when wet and rarely returns to shape. Check the edges and seams first, because a small affected area can sometimes be replaced if you have matching boards.
