Tunneling Under Slab in Pflugerville, TX

When should you call about tunneling under slab?

• Leak under tile or wood you want to keep
• Leak far from an outside wall is less suited
• Pipes near the middle of the home

Related guide: how clay soil moves Pflugerville slabs.

What should you do right now?

1. Shut off the main water valve. It is in the meter box near the street, or where the main line enters your garage or an outside wall. Turn it clockwise until it stops.
2. Warm floor? Close the cold-water inlet on top of the water heater.
3. Water near outlets? Stay away. Switch off the breaker only if you are on dry ground.
4. Smell gas? Leave and call your gas utility or 911 from outside.

What will the local provider do?

1. Dig an access pit outside
2. Tunnel under the slab to the leak
3. Repair the pipe
4. Backfill and compact the tunnel

Start with finding slab leaks in Pflugerville if you are not sure what you need.

What causes the problems tunneling under slab finds?

Tunneling is chosen to reach a leak without breaking the floor inside. It suits certain leak locations and home layouts.

• Leak under tile, stone or wood you want to keep
• Leak under cabinets or built-ins
• Leak near an outside wall
• Homeowners who need to stay in the home during work

Which warning signs matter most?

What should you expect?

The access pit is dug beside the foundation, and the tunnel runs under the slab to the leak. After repair, the tunnel is filled and compacted so the soil supports the slab again.

When is this the right choice?

Tunneling keeps the inside of the home usable during the work, which matters for families who cannot move out. It is often the preferred choice when the leak sits under a kitchen, a finished bathroom or new flooring, and when the leak is within a reasonable distance of an outside wall.

How can you prevent it?

• Ask how the tunnel will be backfilled and compacted
• Clear the outside work area of plants or pavers you want to keep
• Ask about protecting sprinkler lines near the access pit
• Check the area after heavy rain once the work is done

What is tunneling under a slab?

Tunneling reaches a leak under the foundation by digging from outside the house. The provider digs a pit next to the foundation, then tunnels under the slab to the leak. The pipe is repaired from below, and the tunnel is backfilled. Floors inside the house are not touched.

Tunneling is often chosen when the leak sits under flooring that is costly to replace, such as stone tile or hardwood, or under cabinets and fixtures.

How does tunneling work?

1. Detection marks the leak location inside the house.
2. The provider picks the shortest path from outside to the leak.
3. A pit is dug next to the foundation, and a tunnel is dug under the slab.
4. The damaged pipe is repaired or replaced.
5. The line is pressure-tested.
6. The tunnel is backfilled and compacted in layers.
7. The yard is restored at the surface.

Soil is usually piled on tarps in the yard during the work. Landscaping over the dig path may need replanting.

Tunneling or direct access?

Why is backfill important?

Backfill is how the tunnel is filled after the repair. It needs to be compacted in layers so the soil under the slab supports the foundation again. Poor backfill can leave voids that settle over time. In clay soils, which swell and shrink with moisture, this step matters even more. Ask the provider how they backfill and compact, and whether they add any material to improve support.

What should you ask before tunneling?

• How long will the tunnel be, and where will it start?
• How will you protect landscaping, sprinklers and utilities?
• How will you backfill and compact the tunnel?
• Will utility lines be marked before digging (call 811)?
• Who restores the yard?
• Is a permit or engineer report needed?

How long does tunneling take?

It depends on how far the leak is from the outside wall, the soil, and how much digging is needed. A leak near the edge of the house may take a day or two. A leak near the middle of a large home can take longer. Weather also plays a part: heavy rain can slow digging and backfill in clay soil.

Ask for a schedule that covers digging, repair, testing, backfill and yard cleanup, so you know how long the pit will be open.

What should you check after tunneling?

• Confirm the line was pressure-tested before backfill
• Watch the meter for a few days with all fixtures off
• Look for settling in the yard where the tunnel was dug
• Watch for new cracks in floors or walls near the repair
• Keep the report showing tunnel length and backfill method

What affects the cost of tunneling?

• Distance from the outside wall to the leak
• Soil type and how hard it is to dig
• Obstacles such as patios, driveways, trees or utility lines
• Backfill material and compaction method
• Yard and landscape restoration

Tunneling is often priced by the foot. Ask how the length was measured and what happens if the tunnel needs to be longer than planned.

Can tunneling reach more than one leak?

Sometimes. If two leaks sit close together, one tunnel may reach both. If they are far apart, the provider may suggest separate tunnels or a reroute instead. Ask them to show you the planned path on a sketch of your home before digging starts.

Where in Pflugerville can you get tunneling under slab?

• Slab leak detection in Blackhawk 78660
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• Slab leak detection in Park at Wellspoint 78664
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• Slab leak detection in Bohls Place 78660

Related services

• Slab Leak Repair
• Pipe Rerouting
• Whole House Repipe
• Direct Access Repair
• Epoxy Pipe Lining

Tunneling Under Slab questions