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Techo-Bloc Home Additions & ADU: The Riverside Owner’s Guide
Most Riverside homeowners calling us about Techo-Bloc home additions and ADUs aren’t starting from zero. They’re partway through a project, or they’ve got a structure that’s showing real problems at the connection points: frost heave at the slab edge, a ledger board that’s pulling away from the house, or a roofline that doesn’t tie in clean. Techo-Bloc makes hardscape products, and when those products meet a framed addition or an ADU, the failure almost always happens at the transition. In Riverside, an addition tied to existing Techo-Bloc paving typically runs $45,000 to $130,000 installed, depending on square footage, foundation type, and how much rework the hardscape needs. We stock the transition materials and the framing components on our trucks, and we can usually start within two weeks of the written estimate.
Which Techo-Bloc Models This Applies To
Techo-Bloc’s product lines that matter for additions and ADUs are primarily the Blu 60, Blu 80, and Industria paver systems, along with Raffinato and Mista slabs for patios and walkways. These are the units we see integrated into Riverside backyards where an ADU or addition is going in. The compatibility gotcha most owners miss: Techo-Bloc pavers are manufactured to metric dimensions in millimeters, not inches. A Blu 60 paver is 60mm thick; Blu 80 is 80mm. If you’re tying a new addition’s door threshold to existing paving, that thickness difference changes your floor elevation and your step height, and it can put you out of compliance with Riverside’s building code on egress. Before you order a door or set a foundation height, measure the paver thickness at the threshold with a tape measure, not the product name. The label on the original invoice won’t tell you whether the installer added a bedding layer that changed the finished elevation.
Styles & brands we work with
Signs Your Techo-Bloc Home Additions & ADU Is Failing
- Gaps opening between pavers and the structure. Riverside’s clay soil expands and contracts with moisture, and if the sub-base wasn’t compacted to spec, pavers shift away from the slab edge. That gap becomes a trip hazard and a water entry point, not just a cosmetic problem.
- Water pooling at the transition point. When an addition’s roofline sheds water onto Techo-Bloc paving without proper drainage, you get standing water at the foundation line. Over time that water works into the sub-base and undermines both the pavers and the slab edge.
- The door threshold sits proud or low. If the paving settled, your threshold height may now be out of code for bedroom egress in an ADU. Riverside code enforcement checks this on final inspection for any permitted addition, and it’s a common correction line item.
- Cracks in the slab or stem wall near the paving. In neighborhoods like Hawarden Hills with older lots, root pressure from mature trees pushes against new concrete work. If the addition’s foundation is cracking within the first two years, it’s usually a sub-base or drainage problem, not a concrete mix problem.
- Separation at the roof tie-in. A new addition’s roof has to tie into the existing roofline with proper flashing. When that tie-in is rushed, you see water stains on the interior ceiling within one rainy season, and the fix requires opening the roof plane.
See the difference
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After
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After
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AfterReplacement Cost & What’s Included
A Techo-Bloc-related home addition or ADU in Riverside runs $45,000 to $130,000, and the spread comes down to three things: square footage, foundation type (slab on grade is cheaper than a raised floor over a crawlspace), and how much hardscape rework the project triggers. If we’re pulling up 800 square feet of Blu 80 pavers to re-grade and re-compact the sub-base, that’s a real line item. A basic wood-frame addition with a simple gable roof and standard finishes lands near the bottom of that range; an ADU with a kitchen, bathroom, separate meter, and upgraded exterior cladding lands near the top. Every estimate from Bradford Remodeling includes the written price, the full scope, the brand names for every material (Techo-Bloc, KraftMaid, Cambria, Silestone, Kohler, Moen among them), and the 365-Day Done Right Promise in writing. No numbers move at the door.
DIY or Call Us?
What you can safely do: measure paver thickness at the threshold, photograph any cracking or separation, note where water pools after rain, and pull any old invoices or permits you have. That information makes our first visit faster and your written estimate more accurate. What you shouldn’t do: start cutting pavers with a demo saw to fix a trip hazard, attempt to re-set a ledger board that’s pulling away from the house, or open any roof plane to chase a leak. These are structural connection points. A ledger board failure on an addition means the floor assembly is losing its connection to the house, and that’s not a Saturday project. Curtis Lane has been running crews across Southern California for nearly three decades, and his rule is simple: straight number, real scope, no surprises at the final walk. If you’re in Riverside and your Techo-Bloc addition or ADU is showing signs of trouble, call (424) 567-8472 and we’ll schedule a walkthrough.
FAQs
A properly built addition or ADU in Riverside should last 50 years or more for the structure, with the Techo-Bloc paving at the transition point needing re-leveling or re-compaction every 15 to 25 years depending on drainage and soil movement. Riverside’s clay soil is harder on hardscape than the coastal areas, so expect more maintenance here than in Orange County. Call (424) 567-8472 if you want us to look at what’s moving.
Sometimes. If pavers have shifted but the sub-base is intact, we can pull the affected section, re-compact, and re-set without full replacement. If the failure is at the structural tie-in, like a ledger board or roof flashing, repair in place is usually possible but the surrounding finishes have to come off to do it right. We’ll tell you which one applies before you spend a dollar.
A paver transition repair at an addition or ADU is typically a two to three day job. A full addition or ADU is a 10 to 16 week project depending on scope and permitting. Riverside’s plan check and inspection schedule adds two to four weeks to any structural project, and we factor that into the written timeline. Call (424) 567-8472 for a project-specific schedule.
We keep the common transition materials on our trucks: edge restraints, geotextile, bedding sand, polymeric joint sand, and the flashing materials for roof tie-ins. For full paver runs, we order directly from Techo-Bloc’s distribution network with a lead time of one to two weeks, and we verify the exact paver line and color before ordering so you don’t end up with a mismatched patch. Estimates are free; mention the brand and we’ll come measured up.
Written by Curtis Lane, Owner, Bradford Remodeling Co Riverside at Bradford Remodeling Co Riverside, serving Riverside and nearby areas.
