I had a client use Erik Flores with FNF Foundation Repairs and they did an amazing job! Mr. Erik was very communicative from the very start of the process and came out right away to measure and assess the foundation with his measuring tools and laser equipment. My client had several quotes and they varied in price and scope of work. Mr. Erik took a common sense approach to the repairs and was able to move another client to start the job right away. The work he did was solid - communicated every step of the way and even showed how they were fixing the foundation! Corrected measurements came out great! My clients are so happy to have this issue fixed and Mr. Erik does offer a lifetime transferable warranty for peace of mind! I spoked with a number of previous clients and they reported the same thing, excellent work at a fair price and great followthrough! I highly recommend Mr. Erik Flores and FNF Foundation Repairs if you have any foundation issues!
Under-Slab Tunneling Houston, TX — No Breaking Your Floors.
FNF Foundation Repair's under-slab tunneling service in Houston, TX accesses plumbing systems, foundation components, and utility lines beneath your concrete slab by excavating a tunnel from outside the home perimeter — eliminating the need to jackhammer through interior flooring. Non-invasive. Fast. Locally owned.
What Is Under-Slab Tunneling?
Under-slab tunneling is a technique for accessing the area beneath a concrete slab foundation without breaking through interior flooring. Instead of jackhammering through your tile, hardwood, or concrete from inside the home, our crew excavates a horizontal tunnel from the exterior foundation perimeter inward — reaching the target area cleanly and efficiently.
This approach is used when plumbing repairs, pier installation, waterproofing, or utility work needs to be performed beneath an occupied home. It protects your interior floors and finishes, keeps your home livable throughout the repair, and eliminates the costly process of replacing tile or flooring afterward.
Compared to jackhammering through interior floors, tunneling causes no floor damage, keeps disruption minimal, requires no flooring replacement, contains dust and debris outside the home, and is typically completed in 1–3 days.
?Tunneling vs. jackhammering — what's the difference?
Jackhammering breaks through your interior floors, fills the home with dust and debris, and requires expensive flooring replacement afterward. Tunneling reaches the same point from outside — your floors are never touched. Our inspector confirms whether tunneling fits your home during your free assessment.
When Do Houston Homes Need Under-Slab Tunneling?
Houston's clay soil causes slab pipe failures more often than most U.S. cities. Tunneling lets us fix what's beneath your home while your floors, tile, and daily life stay exactly as they are.
A slab plumbing leak or foundation issue beneath your floors?
Tunneling gets the job done without touching a single floor tile.
Schedule Free Tunneling Assessment →FNF Foundation Repair's Tunneling Process.
Site Assessment
We inspect the exterior foundation perimeter, review any available plumbing or structural drawings, and determine the precise access point. We mark the excavation path and confirm the approach with you before breaking ground.
Free written assessmentTunnel Excavation
Our crew excavates the tunnel from the exterior, working inward beneath the slab and shoring the walls as we go for structural integrity. The excavation is clean and contained — no interior work until the tunnel is complete.
No interior disruptionRepair + Restoration
Once the target work is complete, we restore the tunnel with compacted fill and concrete, and return the exterior to its original condition. A final inspection confirms stability.
Typically 1–3 daysUnder-Slab Work Without Breaking Floors
Real footage of foam injection and stabilization performed beneath a slab — reached from outside the home so your floors stay untouched.
Work We Perform Through a Tunnel
Tunneling is frequently paired with slab foundation repair when piers must be placed beneath finished floors.
What Will This Cost?
Every home is different. The scope of work depends on the tunnel length and depth, your foundation type, soil conditions, and the repair being performed at the access point. There is no accurate way to give a price without seeing your home in person.
FNF Foundation Repair provides a free, no-obligation assessment and a clear written estimate — so you know exactly what needs to be done, and what it will cost, before you commit to anything.
Get My Free Written Estimate →Under-Slab Tunneling Across Greater Houston.
FNF Foundation Repair provides under-slab tunneling across all 15 cities in our service area — from Pasadena and Pearland to Katy and The Woodlands.
Rated 5.0 Stars Across 37 Google Reviews.
We had a great experience with FNF Foundation. Erik and his crew were highly professional, arriving early and finishing our foundation lift in a single day. Erik took the time to answer all our questions, and the pricing was very fair. Highly recommended!
FNF Foundation Repair did a wonderful job for me! Their work ethics were outstanding. Erick was always timely. He was helpful, kind, respectful and more importantly knowledgeable in his work. His pricing was unbeatable. I will and have highly recommend FNF!!
Under-Slab Tunneling Questions, Answered.
Still have questions? Our team is happy to help.
Call (713) 560-5843Related Foundation Services.
Fix What's Beneath Your Floors — Without Touching Them.
Our certified inspector assesses your foundation perimeter and access points, then delivers a written plan — at absolutely no cost and zero obligation. Honest answers, not a sales pitch.
No sales pressure. No obligation. Just honest answers about your home.
Request Your Free Inspection
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Thank you — a member of the FNF Foundation Repair team will call you within 2 business hours to schedule your free inspection.