Free written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
Techo-Bloc Home Additions & ADU: The Houston Owner’s Guide
Techo-Bloc hardscape products rarely fail on their own, so when a paver, wall block, or coping unit shifts, cracks, or separates during a home addition or ADU build in Houston, the problem is almost always what's underneath it. Penhallow Remodeling Houston installs and repairs Techo-Bloc-compatible additions and accessory dwelling units (ADUs) throughout the Houston area, with full home addition projects typically running $45,000–$130,000 depending on square footage, foundation work, and the Techo-Bloc product line you choose. Most owners discover a problem when a new addition’s walkway settles unevenly against the original slab, or when a paver patio installed as part of an ADU project starts heaving after a heavy Houston rain.
Which Techo-Bloc Models This Applies To
Techo-Bloc organizes its product lines by series, and that matters more in Houston than most people expect. The Blu 60, Blu 80, and Villagio paver series are all engineered for different load ratings and joint widths, and mixing them on a single project creates uneven expansion joints that fail within two or three Houston summers. We check the manufacturer stamp on the underside of the paver or the back face of a wall block to confirm the series before we touch anything. For OEM replacement, matching the series and color batch is non-negotiable because Techo-Bloc runs distinct color cycles, and a paver from a different run will show a visible tone shift under Texas sun. On many additions, a quality aftermarket paver from Belgard’s comparable line performs fine, but only if the base depth matches the Techo-Bloc spec. Get the base wrong and the warranty on the pavers is worthless no matter who made them.
Styles & brands we work with
Signs Your Techo-Bloc Home Addition or ADU Hardscape Is Failing
- Pavers rocking underfoot near the addition slab. This almost always means the compacted base has washed out, which happens in Houston when a downspout discharges too close to the edge of the walkway.
- Wall blocks tilting outward on a raised patio or ADU retaining wall. Houston’s clay soil expands when wet, and a wall without proper drainage stone behind it becomes a slow-motion failure.
- Joint sand disappearing after every heavy rain. If the sand washes out twice in one season, the edge restraint is broken or was never installed to the depth Techo-Bloc requires.
- Cracks in a paver driveway leading to a new ADU. Cracks that run in a straight line across multiple pavers point to a settling subgrade, not a paver defect.
- Coping stones on a pool surround shifting after the addition changes drainage. When we add a room, we change how water moves across the whole property, and older hardscape often shows that strain first.
See the difference
Before
After
Before
After
Before
AfterReplacement Cost & What’s Included
In Houston, repairing or replacing the Techo-Bloc hardscape tied to a home addition or ADU project typically falls between $3,500 and $18,000 depending on how much of the base needs to be rebuilt. A small section of settled walkway might run $3,500–$5,000 including new base material, edge restraint, and joint sand. A full paver driveway replacement connected to a new ADU often lands between $7,000 and $18,000 in Houston because we’re removing and hauling the old material, recompacting the subgrade, and resetting every unit to the manufacturer’s slope spec. Every job from Penhallow Remodeling Houston gets a written price before we start, with the 365-Day Done Right Promise in writing: if the hardscape shifts or the joints fail inside a year, we come back and fix it at no charge.
DIY or Call Us?
You can safely check your downspouts and make sure water isn’t dumping against the edge of a paver walkway, because that’s the number one cause of settlement near Houston additions. What you shouldn’t do is pull up a failed section and guess at the base depth, because Techo-Bloc pavers on a weak base fail the same way the second time. The same goes for any wall block over two feet high, where the weight and soil pressure make a collapse a real risk. If you’re looking at a settled walkway, a heaving patio, or a wall that’s leaning, call us at (254) 527-5340. We’ll assess the base, the drainage, and the Techo-Bloc series involved, then give you a written number before a single paver gets pulled. Give me the straight story on what you need, and I’ll give you the straight number on what it costs.
FAQs
Techo-Bloc pavers and wall units themselves typically carry a transferable lifetime warranty against manufacturing defects, but here in Houston the real lifespan is set by the base and drainage, not the paver, so expect 20–25 years from a properly installed base and under 10 from one that was never compacted to spec. Call (254) 527-5340 if you want us to check what’s underneath yours.
Yes, if the settlement is confined to a defined area and the base still drains, a repair is usually $3,500–$5,000 in Houston rather than a full replacement, but if the edge restraint has failed around the entire perimeter, you’re better off resetting the whole surface. We’ll tell you straight which one applies before we quote a number.
Most repair jobs run one to three days depending on the square footage and how much base material has to be removed and recompacted, and we’ll give you a defined arrival window before the crew shows up. Your project won’t drag on for weeks.
We source directly from Techo-Bloc’s Houston distribution channel and handle the ordering, delivery, and color matching ourselves, so you’re not stuck coordinating with a supply yard. We also work with Belgard and Unilock products when the project or budget calls for a different brand, along with hardscape-adjacent brands like Cambria and Silestone for interior surfaces around the addition.
Written by Trevor Nash, Owner, Penhallow Remodeling Houston at Penhallow Remodeling Houston, serving Houston and nearby areas.
