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Techo-Bloc Home Additions & ADU: The San Antonio Owner’s Guide
Techo-Bloc home additions and ADUs in San Antonio typically run $45,000 to $130,000 installed, depending on square footage, foundation work, and the Techo-Bloc product line you’re matching. We stock and install Techo-Bloc-compatible hardscape materials for additions, and if a Techo-Bloc paver, wall block, or step unit on your existing structure is cracked, shifting, or failing, we can usually get the replacement matched and installed within the week. Most San Antonio homeowners discover a Techo-Bloc component has failed when they notice a paver sinking at the addition’s edge, a retaining wall block spalling after a hard freeze, or water pooling where the new slab meets the old Techo-Bloc walkway.
Here’s the thing about Techo-Bloc products: they’re engineered to handle freeze-thaw cycles far better than standard concrete pavers, but San Antonio’s clay-heavy soil expands and contracts during our wet-dry cycles, and that movement puts stress on any rigid installation. When a home addition or ADU is built, the connection point between the new foundation and existing Techo-Bloc hardscape is where failures show up first.
Which Techo-Bloc Models This Applies To
We work across the Techo-Bloc lines most common in San Antonio additions: the Blu 60 and Blu 80 slab pavers, the Borealis and Industo wall systems, the Para and Valencia paver series, and the Raffinato step units used for entry transitions. The compatibility gotcha most homeowners run into is that Techo-Bloc changes paver dimensions slightly between production runs, so a Blu 60 paver from 2018 won’t always sit flush with a Blu 60 paver manufactured this year. The paver is nominally the same, but the chamfer and height tolerance can drift enough to create a lip you’ll catch a toe on.
OEM Techo-Bloc is the right call when you’re matching an existing visible surface. The color blends are proprietary, and aftermarket pavers that claim to “match” a Techo-Bloc color usually don’t, especially after a San Antonio summer fades them at different rates. For buried or structural components, a quality aftermarket equivalent from a local paver yard often performs identically and costs less. We’ll tell you which is which before you spend a dollar. Sawyer Remodel San Antonio is an independent service provider; we’re not affiliated with Techo-Bloc, but we install and repair their products every week.
Styles & brands we work with
Signs Your Techo-Bloc Home Additions & ADU Is Failing
- Pavers sinking or lipping at the addition’s edge. This is almost always a base-prep problem: the original installer didn’t compact the soil where the new foundation disturbed it, or they skimped on the crushed limestone base. The paver drops, and now the transition from your new ADU door to the walkway is a trip hazard.
- Retaining wall blocks cracking or spalling. San Antonio’s freeze-thaw cycles don’t happen often, but when they do, water trapped in a Techo-Bloc wall block that wasn’t sealed or drained properly will pop the face off the block. You’ll see flaking and exposed aggregate.
- Joint sand washing out after every rain. If you’re sweeping polymeric sand back into Techo-Bloc paver joints after every storm, the base is shifting or the pitch is wrong. Joint sand shouldn’t move once it’s cured.
- Pooling water between the new structure and existing hardscape. An addition or ADU changes the drainage pattern on your lot. If the Techo-Bloc surface wasn’t re-pitched during construction, water sits where it never used to sit, and that accelerates every other failure on this list.
- Wall blocks leaning or bulging outward. Clay soil in San Antonio swells when wet and shrinks when dry. A Techo-Bloc retaining wall without proper drainage behind it becomes a slow-motion failure. You’ll see the top course start to drift before anything visibly cracks.
See the difference
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After
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After
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AfterReplacement Cost & What’s Included
For Techo-Bloc home additions and ADU work in San Antonio, plan on $45,000 to $130,000 for a full project. That range covers everything from a modest paver patio extension with a Techo-Bloc walkway to a full ADU with matching Techo-Bloc hardscape. A standalone Techo-Bloc hardscape repair, like re-laying a 200-square-foot sunken paver section or rebuilding a failing wall, typically runs $3,500 to $11,000 using the paver patio and wall pricing we’ve calibrated for this market.
What drives the number: how much base repair is needed, whether you’re matching existing Techo-Bloc (more expensive) or starting fresh, and whether drainage work is required. We give you a written price before any work starts, and the number on that sheet is the number on the invoice. Our 365-Day Done Right Promise covers the installation for a full year. If something shifts or fails, we come back and make it right, no argument.
Key Takeaways
- Techo-Bloc additions and ADUs in San Antonio: $45,000 – $130,000 installed
- Isolated Techo-Bloc hardscape repair: $3,500 – $11,000
- Written price before work starts, fixed, no change orders
- 365-Day Done Right Promise on every installation
- We stock common Techo-Bloc pavers and wall block locally
DIY or Call Us?
Replacing a single cracked Techo-Bloc paver is something a homeowner can do in an afternoon: pry it up with two flat bars, add a little sand, drop the new paver in. The problem with additions and ADUs is that one bad paver is rarely the whole story. If the base is failing, replacing the surface paver buys you six months before it sinks again. And if you’re dealing with a Techo-Bloc retaining wall that’s leaning, do not try to rebuild it yourself. Wall blocks weigh 40 to 80 pounds each, and a wall under soil pressure can shift unexpectedly. That’s how fingers get crushed and backs get wrecked.
What you can safely check: Is the joint sand washing out? Is water pooling? Are you seeing cracks run through multiple pavers in a line? Take photos, make notes, and call us. Luca Romano and the crew will walk the site, tell you what’s actually failing, and give you a written price to fix it right. Call (432) 547-6806 and we’ll set a time.
FAQs
A properly installed Techo-Bloc paver surface on a compacted base in San Antonio will last 25 to 30 years before needing meaningful repair, but the base preparation matters more than the paver itself. Clay soil movement is the main killer. If the base is done right, the pavers will outlast most other elements of the structure. Call (432) 547-6806 and we’ll assess what you’ve got.
Most failures can be repaired without full replacement. A sunken section of pavers needs the base re-compacted and the pavers re-laid, not a new surface. A leaning wall section can usually be rebuilt with proper drainage added behind it. Full replacement only makes sense when the pavers themselves are damaged beyond salvage or you’re changing the layout. We’ll tell you which one applies, and the estimate is free.
A typical paver repair or wall rebuild takes one to three days on site. A full Techo-Bloc hardscape installation around a home addition or ADU runs one to three weeks depending on scope. You’ll get a schedule before we start, and we stick to it. The Relay Visibility Guarantee means you get photo updates and live arrival times the whole way through.
We stock the most common Techo-Bloc pavers, wall blocks, and edge restraints locally in San Antonio, so repairs can usually start within days. If you need a specific color blend or a discontinued series, we’ll source it through our suppliers and give you a clear timeline before you commit. Call (432) 547-6806 to check availability for your product line.
The craft comes first. Everything else follows.
Written by Luca Romano, Owner, Sawyer Remodel San Antonio at Sawyer Remodel San Antonio, serving San Antonio and nearby areas.
