Unilock Driveway & Pavers Nationwide

Unilock Driveway & Pavers: The Redwood City Owner’s Guide

Unilock paver driveway repair and replacement in Redwood City typically runs $5,000-$18,000 installed, depending on whether we’re addressing isolated joint failure or full substrate collapse. We stock Unilock-compatible edge restraints, polymeric sand, and permeable base aggregates for same-day stabilization work on most series. Most Redwood City homeowners discover their Unilock driveway is failing when they notice pooling after light rain, or when a single paver rocks underfoot and the neighbors don’t.

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Which Unilock Models This Applies To

Unilock’s driveway lines break into three families, and the part you need depends on which family is in your yard. The EnduraColor series, including Beacon Hill Flagstone and Richcliff, uses a two-layer manufacturing process; the wear layer is roughly 3/8 inch thick, so resurfacing is not an option once that layer spalls. Classic series pavers like Holland Stone and Brussels Block are full-body concrete, which means a cracked unit can be swapped without color-matching anxiety, though the older the install, the more the sun has shifted the tone. Umbriano and other EnduraColor Plus products carry a factory-applied EasyClean stain resistance; if you’re replacing individual units, the new paver won’t match the weathered EasyClean performance of its neighbors for about two seasons.

Identification is straightforward if the original installer left paperwork. Without it, flip a loose paver: Unilock stamps the back with the series name, manufacturing plant code, and production date. The date matters because Unilock reformulated its polymeric sand compatibility specs around 2019; older installs bonded with Techniseal RG+ may need complete joint removal before new sand will cure properly. We carry both the legacy and current Techniseal formulas on our Redwood City trucks. Rowan Construction Group Redwood City is an independent service provider; we are not affiliated with Unilock.

Signs Your Unilock Driveway & Pavers Is Failing

• Individual pavers rock or sink when stepped on. This usually means the bedding sand layer has washed out or the base aggregate has settled. In Redwood City’s clay-heavy soils, especially in the Stambaugh-Heller area where lot grading was often informal, water finds the low spot and erodes the 1-inch bedding course from underneath.
• White haze or efflorescence that returns after cleaning. Soluble salts migrating through the concrete body indicate moisture is moving through the paver faster than the joint drainage was designed to handle. On north-facing driveways in Redwood City, this persists longer because the surface never fully dries.
• Joint sand washing out into the street after rain. Polymeric sand fails when installed on damp substrate or when activated by rain before full cure. We’ve found this on at least a dozen Redwood City driveways where the original crew worked ahead of a forecast.
• Edge restraints pulling away from the perimeter. Plastic spike-in edging degrades in UV; aluminum L-channel corrodes where lawn fertilizer collects. Either failure lets the field pavers drift, and the gap grows geometrically once it starts.
• Spider cracking concentrated in one area. Unlike random freeze-thaw damage, a tight cluster of cracks points to a point load or base void. In Redwood City, this often traces to a tree root that was removed but left a decaying cavity, or to a utility trench that was backfilled with native clay instead of compacted aggregate.

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Replacement Cost & What’s Included

The spread on full replacement comes down to three variables: driveway square footage, whether we need to export and replace the base (not just top-dress it), and the specific Unilock series you select. Brussels Block runs toward the lower end of the range; Umbriano with custom border detailing pushes toward the upper. Under Clause 1 of the Haven Standard, the price we write is the price you pay; no change order moves forward without your signature, which is why our projects finish within a few percent of the agreed number. Every driveway job carries our 365-Day Done Right Promise and a documented photo record of substrate condition, base compaction passes, and final layout.

DIY or Call Us?

There’s honest work a homeowner can do without calling anyone. Sweeping fresh polymeric sand into open joints after a heavy rain, or resetting a single paver that has popped loose with intact bedding underneath, falls into that category. Buy the sand dry, work on a dry forecast window, and follow the bag cure time exactly; rushing the water activation is the mistake we see most often.

Where DIY goes wrong is anything involving the base layer. Excavating to add or replace aggregate, running a plate compactor on a slope, or diagnosing why a 10-foot section is settling all require knowing what the substrate looked like before it was buried. We’ve opened driveways in Redwood City where the previous owner had patched the same spot three times because the real problem was a crushed drainage line two feet down. That excavation is not a weekend project; it’s a permit-check, utility-locate, and soil-export operation. Call (650) 560-7228 and we’ll scope it, price it in writing, and show you the photo evidence before you decide.

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