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Unilock Construction in Redwood Shores, CA | Spruce Contractors
We’re Spruce Contractors, an independent Unilock installer and repair contractor serving Redwood Shores. We work on Brussels Block, Beacon Hill, Umbriano, and Pisa2 systems all over the 94065 zip code, with a focus on how these pavers and walls hold up on engineered fill and lagoon-front lots. That last part matters. Unilock systems fail differently here than they do inland, and most of our Redwood Shores callouts are corrections of those specific failures, not fresh installs. Call (877) 265-5771 for a free estimate.
Why Redwood Shores Residents Choose Us for Unilock Service
We’ve been installing and repairing Unilock hardscape across Redwood Shores since the 1990s, and we’re proud to be a trusted Redwood Shores General Contractor. Nate Calloway, our owner, grew up in Hillsborough and trained through College of San Mateo’s construction technology program, then spent years in the field across San Mateo County before running Spruce full-time. We know which sections of Redwood Shores sit on the softest fill, which lagoon-front lots fight you on drainage, and where the marine layer keeps paver joints wet for months at a time.
We’re not a Unilock-authorized dealer and we don’t pretend to be. What we are is a contractor who has torn apart enough failed paver bases in Redwood Shores to know exactly what causes them and what actually fixes them. We source genuine Unilock pavers and wall units for color and dimensional matches, then pair them with quality aftermarket polymeric joint sand and geogrid when the original system is discontinued. If you’re pricing a repair, replacement, or new Unilock sales & service project, we’ll give you a written line-item quote and walk you through what’s actually needed under local conditions.
Styles & brands we work with
Common Unilock Construction Problems We Solve in Redwood Shores
- Brussels Block paver settlement after a repipe or drainage fix. Much of Redwood Shores housing stock is 1980s to 2000s slab-on-grade construction with original polyethylene plumbing. When a repipe happens, contractors trench through the yard, backfill, and move on. The engineered fill was never recompacted. Six months later, Brussels Block pavers over that trench settle two inches, leaving trip hazards and ponding. We see this constantly in Redwood Shores.
- Efflorescence and joint sand washout on Beacon Hill and Umbriano pavers. Lagoon-side irrigation overspray plus the marine layer keeps the bedding course saturated much of the year here. Beacon Hill and Umbriano surfaces develop white efflorescence and the joint sand washes out far faster than inland installations. It’s not a paver defect; it’s a Redwood Shores water problem.
- Pisa2 retaining wall rotation on lagoon-facing slopes. When a Pisa2 wall is cut into bay mud without proper geogrid reinforcement and a drainage column behind the wall, it bulges or rotates within a few wet winters. Redwood Shores slopes facing the lagoon are the worst-case scenario for this because groundwater is high and the soil is young.
- Spalling and cracking from deicing salts. Rare for Redwood Shores, but when the occasional freeze hits, homeowners along Redwood Shores Parkway and the townhome clusters reach for the rock salt. Brussels Block and Umbriano concrete pavers are not designed for repeated salt exposure. We replace spalled units rather than sanding down the surface and weakening the already-thin wear layer.
- Ponding on flat paver patios near the lagoon. Homes near the Redwood Shores Lagoon sit on land so flat that even a one-percent grading error leaves standing water. We correct this with a deepened, geotextile-separated base and, where needed, an underdrain tied to the lagoon outfall. The fix is underground, not on the surface.
Unilock Service in Redwood Shores: What Local Conditions Mean for Your Equipment
Redwood Shores was built on engineered fill and bay marshland, and that single fact shapes every paver and wall installation here. The city requires engineered-fill lots to maintain positive drainage away from the slab. That means a Unilock paver patio or driveway in Redwood Shores cannot be built on a standard 4-to-6-inch compacted base like Unilock in San Carlos or other inland San Mateo County jobs would. It needs a deepened, geotextile-separated base with a perforated underdrain, and on lagoon-front properties that underdrain must tie into the lagoon outfall. That detail also has to pass Bayfront environmental review, which adds paperwork and time that generic paver installers either skip or don’t know about. When the base detail is wrong, the failure mode is predictable: bedding sand migrates into the failed subdrain, paver edges settle, and thresholds become trip hazards. We’ve corrected this exact problem on lagoon-front patios throughout Redwood Shores, including homes along Bridge Parkway and Marlin Drive, where the water table rises during king tides. If your paver surface is settling, heaving, or ponding, the work under it is usually what failed, not the pavers themselves.
Unilock Models & Products We Service in Redwood Shores
While we also work with Unilock in Belmont, we install, repair, and replace all four of the main Unilock paver and wall lines found in Redwood Shores yards: Brussels Block, Beacon Hill, Umbriano, and Pisa2. Brussels Block is the classic tumbled-edge paver you see on dozens of Redwood Shores patios and walkways. Beacon Hill and Umbriano are the smoother, more contemporary faces that newer townhome developments leaned toward. Pisa2 is the retaining wall system we see on lagoon-facing slopes and raised planting beds.
For repairs, we order genuine Unilock units to match the existing color and dimension. For joint sand and geogrid, we use quality aftermarket product where the original Unilock-recommended system is no longer available or has been superseded. We stock the most common Redwood Shores paver sizes locally, which cuts turnaround for patch jobs. For paver fields where more than 20 to 30 percent of the surface is heaved, spalled, or crushed, we don’t patch. We recommend full replacement, because the bedding course is already gone and patchwork will fail again within a season.
See the difference
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AfterUnilock Service Pricing in Redwood Shores
What drives the cost on a Redwood Shores Unilock job is the base work. Engineered fill, high water tables, and lagoon-front drainage requirements mean we’re digging deeper and adding geotextile, underdrains, and sometimes enviro-review steps. That’s the part a cheap bid skips, and it’s exactly the part that determines whether your patio lasts five years or twenty-five.
| Service | Typical Price Range |
|---|---|
| Paver Patio Installation | $3,500 – $11,000 |
| Paver Driveway Installation | $7,000 – $18,000 |
| Driveway Replacement | $5,000 – $14,000 |
| Driveway Sealing | $250 – $700 |
Every estimate includes the excavation, base preparation, drainage, paver or wall units, joint sand, and a written line-item breakdown. Call (877) 265-5771 and we’ll come out to Redwood Shores, look at the site, and give you an exact quote.
Serving Redwood Shores, CA — Our Local Coverage Area
We’re based in the Redwood Shores area and know this community well. Use the map below to see our service coverage — if you’re nearby, we can almost certainly help.
FAQs – Unilock Construction in Redwood Shores
In Redwood Shores, settling Brussels Block pavers after heavy rain almost always trace back to uncompacted engineered fill or a failed subdrain underneath them. The flat, low-lying terrain plus the high water table means water pools beneath the paver base, the bedding sand migrates, and the surface drops. The fix is excavating to stable fill, installing a geotextile-separated base and proper underdrain, and re-laying the pavers. Call (877) 265-5771 for a site evaluation and exact repair quote.
Yes, but only with the right structural detail. On lagoon-front slopes, a Pisa2 wall must sit on a compacted base with geogrid reinforcement tied back into the slope and a drainage column behind the wall. Cut into bay mud without those, the wall bulges or rotates within a few wet winters. We’ve rebuilt multiple Pisa2 walls on Redwood Shores lagoon slopes that failed for exactly that reason.
For Redwood Shores engineered fill, we deepen the base beyond the standard inland depth and always install a geotextile separator and underdrain. The exact depth depends on the fill quality and drainage pattern on your lot, but the geotextile and drainage are non-negotiable. Skipping them is what causes the paver settlement and heaving we correct all over 94065.
Sealing is optional for Umbriano pavers, but in Redwood Shores the marine layer and lagoon humidity make a quality penetrating sealer worth it. It slows efflorescence and reduces joint sand washout from irrigation overspray. We can seal as part of installation or as a standalone service, and we’ll tell you whether your specific exposure actually needs it. Call (877) 265-5771 for a site assessment.
We order genuine Unilock units from the same product line and batch range where possible, and we match the weathered color of your existing surface, not the fresh-from-the-yard color. For older installations where the original line is discontinued, we source the nearest current equivalent and blend. On a lagoon-front Brussels Block patio in Redwood Shores, our crew found the original bedding sand had migrated into a failed subdrain, leaving paver edges settled two inches below the threshold. We excavated to the engineered fill, installed a new geotextile-separated base with a perforated underdrain tied to the lagoon outfall, and re-laid the Brussels Block on a stabilized bedding course, restoring positive drainage and a level surface without replacing the pavers.
Service Areas Near Redwood Shores
We serve all of Redwood Shores and the surrounding San Mateo County communities. That includes Unilock service in Highlands-Baywood Park, Unilock service in Foster City, San Mateo, Belmont, and San Carlos. If you’re just outside 94065, call and we’ll let you know if we cover your street.
Book Your Unilock Service in Redwood Shores Today
If your Unilock pavers are settling, your joint sand is washing out, or you’re planning a new paver patio or driveway in Redwood Shores, call (877) 265-5771 today. We’ll set up a free site visit, walk the property with you, and give you a written line-item estimate before any work starts. Good work doesn’t need a lot of explaining, you can see it.
Written by Nate Calloway, Owner at Spruce Contractors, serving Redwood Shores, CA since the 1990s.