Unilock Driveway & Pavers Nationwide

Unilock Driveway & Pavers: The Mountain View Owner’s Guide

Unilock driveway and paver repair in Mountain View typically runs $7,000-$18,000 for full replacement and $250-$700 for sealing, with most pattern-matching and partial repairs completed in one to three days. We stock Unilock-compatible edge restraints, polymeric sand, and paver units for the Beacon Hill, Richcliff, and Thornbury series on our Mountain View trucks. Most homeowners notice the problem first as shifting after winter rains or oil stains that won’t lift from the porous surface.

Call (669) 215-4852

Which Unilock Models This Applies To

Unilock organizes its driveway and paver lines by thickness, edge profile, and intended load. For vehicle traffic in Mountain View, you’re typically looking at the Beacon Hill Flagstone (60mm), Richcliff (80mm), or Thornbury (70mm) series. The Courtstone and Il Campo lines appear on older Mountain View properties from the 2010-2015 build wave, especially near Castro Street and the downtown corridor.

Identification is straightforward: flip a loose paver and check the molded stamp on the bed. Unilock marks the series name and manufacturing date code there. The critical compatibility gotcha is edge restraint profile. Beacon Hill uses a slimmer 8mm edge; Richcliff requires the heavier 12mm restraint. Mix them and the restraint lip either sits proud (trip hazard) or fails to catch (paver creep within two seasons). We carry both profiles on our Mountain View trucks.

OEM Unilock polymeric sand runs $45-$65 per bag locally. We also stock Techniseal equivalent, which meets the same ASTM C-144 gradation and activates at the same moisture threshold. For color-matched replacement units, Unilock’s dye lots shift every 18-24 months. We keep a photo record of original lot numbers on every Mountain View job so we can source closer matches when the homeowner calls back in year five or eight.

Signs Your Unilock Driveway & Pavers Is Failing

• Individual pavers rock underfoot. The bedding sand has washed out or compacted unevenly, usually from poor initial screeding or water intrusion at the edge restraint. In Mountain View, the clay-heavy soils near the San Francisco Bay side accelerate this when drainage is blocked.
• Visible gaps between units that weren’t there at install. Polymeric sand has degraded or never fully activated. We see this on south-facing Mountain View driveways where thermal cycling breaks the bond faster than shaded installations.
• Edge restraints pulling away from the perimeter. Spikes have corroded or the restraint plastic has UV-fatigued. Unilock’s black HDPE restraint holds up roughly 12-15 years in full California sun; white PVC versions half that.
• Oil stains that darken after cleaning. The paver surface has lost its factory seal and is absorbing hydrocarbons into the body. On Beacon Hill’s pressed surface, this often means replacement of affected units since the stain penetrates the color layer.
• Low spots that hold water more than 30 minutes after rain. Base settlement or root intrusion beneath the 4-6 inch aggregate bed. In Mountain View’s older neighborhoods near downtown, we regularly find this tied to shallow irrigation lines installed after the driveway.

Before

After

Replacement Cost & What’s Included

The spread on full replacement comes down to three factors: driveway square footage, paver series price per square foot (Richcliff runs 40-50% above Beacon Hill), and base condition. If we pull up the existing pavers and find saturated clay or tree root intrusion, the base rebuild adds $12-$18 per square foot. Under Clause 1 of the Haven Standard, we write that number into the quote before we start. No change order gets signed after the fact unless you sign it first. Every paver job in Mountain View carries our 365-Day Done Right Promise and a documented photo record of base condition, edge restraint installation, and final compaction.

DIY or Call Us?

There’s safe homeowner maintenance and there’s work that wastes money. You can pressure-wash at 2,500 PSI or below, keep joints topped with dry polymeric sand, and seal every 3-4 years with a breathable acrylic. Those three tasks extend paver life measurably.

Where DIY goes wrong: resetting individual pavers without checking the base. The void that caused the rock will swallow the replacement unit in six months. Recompacting requires a plate compactor (150-200 lbs minimum) that most homeowners don’t own. And edge restraint installation demands a 12-inch spike pattern into undisturbed soil; miss the spacing and the restraint bows within a season. We’ve rebuilt three Mountain View DIY repairs this year where the homeowner spent $400 on materials and $2,800 with us to correct the base settlement they’d masked.

Call (669) 215-4852 and we’ll scope it in person. Estimates are free, written, and include the photo documentation.

FAQs