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Techo-Bloc Home Additions & ADU: The Austin Owner’s Guide
An attached home addition or detached ADU built with Techo-Bloc materials in Austin typically runs $45,000 – $130,000 for a full, permitted project, depending on square footage, foundation work, site prep, and the Techo-Bloc product line you’re using. If you’re dealing with a failing paver, retaining wall block, or slab system tied to an existing Techo-Bloc addition, we can usually diagnose the issue and provide a written repair or rebuild price on the first visit. Most owners discover a problem the same way: a paver slowly sinks near a downspout, a retaining course starts leaning after a heavy rain season, or a walkway edge creeps outward after years of Austin’s shrink-swell clay doing what that clay does.
Which Techo-Bloc Models This Applies To
Techo-Bloc manufactures a wide range of concrete pavers, wall blocks, and slab systems designed for residential hardscape surrounding home additions and ADUs. The most common product families we see on Austin jobs include the Blu 60 and Blu 80 paver series, the Valencia and Travertina Raw slab lines, and the Semma and Mini-Creta wall blocks. Each series uses a different dimensional module and joint width, so mixing a Blu 60 paver with a Valencia slab won’t give you clean lines, and it can throw off your layout math by half an inch per row.
If you don’t know which Techo-Bloc product you have, check the underside of a loose paver or the back face of a wall block. Techo-Bloc molds their name and sometimes the series code directly into the concrete. You can also measure the paver: Blu 60 slabs are roughly 12″ x 12″ with a 60mm depth, while Blu 80 is closer to 16″ x 16″ with an 80mm depth. Depth matters in Austin because our freeze-thaw cycles are mild but our heat is brutal, and thinner pavers over poor base material fail faster on the south side of a building where summer surface temperatures climb past 150 degrees.
For replacement parts, Techo-Bloc doesn’t sell through big-box stores in most cases. You’ll be working with a dealer or a contractor who has a dealer account. We source genuine Techo-Bloc product for color consistency, because even a one-batch difference in pigment shows up clearly when you’re replacing four pavers in the middle of a patio. Quality aftermarket equivalents exist for some lines, but the color matching is rarely close enough to look right, and we won’t install a patch that looks like a patch.
Styles & brands we work with
Signs Your Techo-Bloc Home Additions & ADU Is Failing
- Sinking or heaving pavers near the foundation. This usually means the base layer was under-compacted or a downspout is dumping water into the bedding sand. Austin’s clay soil expands and contracts more than most soils in the country, so a small base failure becomes a visible low spot within one or two rain seasons.
- Gaps opening between pavers and the foundation or wall. The base edge wasn’t restrained properly, or the edge restraint has degraded. Once the outer pavers move, the whole field starts drifting, and you’ll see the gap widen by hairline amounts each month.
- Retaining wall blocks leaning or stepping outward. This is a drainage problem more often than a block failure. Techo-Bloc wall blocks themselves are dense and well made; what fails is the gravel backfill or the weeping system behind them. When water has nowhere to go, it pushes the wall.
- Efflorescence (white chalky residue) on pavers or slabs. This isn’t structural, but it’s a sign water is moving through the concrete instead of draining away from it. In Austin’s limestone-heavy water supply, efflorescence shows up faster than homeowners expect, and it means your drainage slope needs a look.
- Cracked or spalled pavers. A broken paver is rarely a bad paver. It’s usually point pressure from a shifted base, tree root intrusion, or an overly thin sand bed. When one cracks, the ones around it are next, because the failure is underneath all of them.
Replacement Cost & What’s Included
For full home additions and ADUs built with Techo-Bloc hardscape integrated into the project, Austin pricing runs $45,000 – $130,000. That range covers everything from a modest bump-out with a paver walkway to a full detached ADU with Techo-Bloc patios, wall systems, and slab walkways. What drives the number up or down: foundation complexity (pier and beam vs. slab), the Techo-Bloc product line you choose (Blu 80 costs more than Blu 60, and wall blocks run higher per square foot than pavers), access to the site, and whether we’re dealing with existing drainage issues before we place a single block.
For a targeted repair rather than a full build, such as re-leveling a sinking paver section or rebuilding a failing retaining course, you’re looking at $2,000 – $8,000 depending on the square footage and the condition of the base below. Every quote comes as a written price before any work starts, so the number Trevor Nash gives you at the walkthrough is the number on the final invoice. There’s no verbal ballpark that grows later. The workmanship is covered by our 365-Day Done Right Promise: if something we installed fails inside that year, we return and make it right at no charge.
See the difference
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AfterDIY or Call Us?
Here’s the honest split. You can safely inspect loose pavers, note where water pools after a rain, and check whether your Techo-Bloc products are still sitting flush or starting to drift. You should not attempt to re-level a section of pavers, rebuild a retaining wall, or pour a new base layer unless you already know what a plate compactor weighs and what “screeding the sand” means in practice. The most common thing we see after a DIY attempt is a paver field that looks level for six weeks and then settles twice as badly as before, because the base was never re-compacted to the right density.
If the job is replacing a few cracked pavers, honestly, a skilled homeowner with the right color match and a rubber mallet can do it. If the job touches the base, the edges, or a wall, call us before you spend a weekend on it. Trevor Nash has been working on Austin homes for well over a decade, and he’d rather tell you “you don’t need us for this” than watch someone turn a $600 repair into a $6,000 rebuild. Call (325) 225-5429 and talk it through. Tell me what you need, I’ll tell you what it costs, and we’ll go from there.
FAQs
A properly installed Techo-Bloc paver or slab system should give you 25 to 40 years of service in Austin, with the main failure points being base degradation and drainage issues rather than the concrete itself. The pavers don’t wear out quickly; what wears out is the unglamorous stuff underneath them.
Call (325) 225-5429 if you’re seeing early failures and we’ll figure out what’s going on beneath the surface. Estimates are free.
Yes, in most cases we can pull the affected pavers, repair or re-compact the base beneath them, and reset the same Techo-Bloc products, which saves you the cost of new material and avoids color-match problems. If the base failure is widespread, a spot repair won’t hold, and we’ll tell you that plainly before you spend a dollar.
Call (325) 225-5429 for an assessment and a written repair price.
Most isolated paver re-leveling or replacement jobs take one to two days, including base work and final compaction. A full retaining wall rebuild or a large paver field reset typically runs three to five days depending on site access and how much base material needs to be hauled out and brought back in.
Call (325) 225-5429 for a schedule estimate backed by a written arrival window.
We order Techo-Bloc products through our dealer account to match your existing color and series, and for common lines like Blu 60 and Valencia we can often source them within a few days. We don’t carry a warehouse inventory of every paver color, but we’ll get the right match, and we’ll show you the product label before we install it.
For other materials on your addition or ADU, we also work with KraftMaid, Cambria, and Silestone, so the people behind your hardscape are the same people who can handle your kitchen counter or cabinetry replacement if that’s part of the project. Call (325) 225-5429 with your Techo-Bloc model info and we’ll verify availability.
Ready to Fix It? Call for a Free Estimate
If your Techo-Bloc pavers, slabs, or walls around an Austin home addition or ADU are shifting, cracking, or leaning, call Penhallow Remodeling Austin at (325) 225-5429. You’ll get a real person on the phone, a scheduled walkthrough, and a written price before any work starts. We source the right Techo-Bloc product, fix what’s underneath it, and stand behind the work with the 365-Day Done Right Promise. Penhallow Remodeling Austin is an independent contractor and is not affiliated with or endorsed by Techo-Bloc.
Written by Trevor Nash, Owner, Penhallow Remodeling Austin at Penhallow Remodeling Austin, serving Austin and nearby areas.
