Unilock Construction Service Nationwide

Why Foster City Homeowners Choose Unilock Construction

We provide independent Unilock in Foster City, handling paver driveways, patios, and retaining walls with a level of brand-specific detail most general contractors don’t offer. Our crews have installed and repaired Unilock hardscapes across Foster City for years, which means we understand how their pavers and wall blocks actually behave on engineered fill, against bay-front salt air, and through the winter rain cycles this city gets. We’re independent specialists, not a Unilock dealer, so our recommendations are based on what works on your lot, not on moving product. Call (877) 752-3868 for an estimate on any Unilock repair or new installation.

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Why Trust Ashford Contractors for Your Unilock Construction?

The difference between a Unilock paver job that lasts twenty years and one that fails in five comes down to what’s underneath the pavers. We’ve rebuilt enough failed Unilock installations in Foster City to know that base depth, drainage, and joint sand matter more than the paver itself. Our team works with Unilock Brussels Block, Beacon Hill, Estate Wall, and Lineo product lines regularly, so we know their dimensions, color blends, and how they handle the specific conditions of this city: high groundwater, engineered fill, and lagoon-adjacent exposure.

Glen Mossier grew up in Foster City’s Marlin Cove neighborhood, where he watched lagoon-side homes get rebuilt after water damage. That background shapes how we approach every Unilock project: drainage first, base second, aesthetics third. It’s the same discipline he brought to his construction technology training at Skyline College and to two decades of structural remodels across Unilock in San Mateo County. As an independent Unilock service provider, we’re not bound by manufacturer quotas. We specify what the soil and water table demand.

Common Unilock Construction Problems We Fix in Foster City

• Efflorescence and salt staining on Brussels Block pavers. The chalky white deposit you see isn’t a paver defect. It’s mineral salts wicking up through the paver as moisture evaporates, and Foster City’s humidity plus lagoon-adjacent salt air accelerates it. We clean it and, more importantly, address the moisture path underneath so it doesn’t return season after season.
• Joint sand washout and paver shifting on driveways. When a Unilock driveway loses its polymeric sand and pavers start scooting toward the garage apron, the cause is usually a base that was too thin or skipped geotextile fabric entirely. Foster City’s flat terrain collects water, and without proper drainage, that water saturates the base and pushes sand out. We rebuild the section with an 8-inch compacted base and filter fabric.
• Retaining wall settlement and bulging. Unilock Estate Wall blocks are solid units, but they can’t hold back soil if the wall wasn’t built with drainage behind it. Foster City’s high water table means hydrostatic pressure builds fast after rain. We see walls bowing forward or settling unevenly when no drain pipe or gravel backfill was used. The fix usually involves dismantling, adding drainage, and rebuilding.
• Surface spalling and edge chipping on pavers. De-icing salt and heavy equipment can chew up paver surfaces. We address spalled units with color-matched replacement and adjust the joint sand specification. On older Unilock installations where the original color line is discontinued, we source the closest available match and blend across the repair area.
• Pooling water on paver patios. Foster City’s near-flat grade means a paver patio needs deliberate slope. If the installer set the patio too level, water ponds and the pavers eventually shift. We correct grade, add or repair the base, and reset the pavers with proper fall away from the house.

Unilock Parts & Our Repair-vs-Replace Approach

We use genuine Unilock pavers and wall blocks for repairs and new installs so color and dimension match exactly. Nothing looks worse than a patch job with a slightly different paver. For base aggregates and polymeric joint sand, we source quality materials locally and specify them based on the soil conditions on your lot. If a wall or driveway failure is limited to one section, we repair it. If more than 20% of the area is heaved, the base is compromised, or the drainage was never installed correctly, we recommend a full rebuild rather than repeated patchwork that costs more over time. Build it right the first time, and you won’t be rebuilding it in ten years.

Call (877) 752-3868 and we’ll tell you honestly whether your Unilock installation needs a repair or a rebuild.

Our Unilock Service Process – Step by Step

1. 1
   Site inspection and base evaluation. We probe the existing base depth, check for geotextile fabric, and assess drainage around the area. On Foster City lots, we also note groundwater indicators and any lagoon-proximity concerns.
2. 2
   Repair or install plan. We confirm the specific Unilock line (Brussels Block, Beacon Hill, Lineo, Estate Wall), verify paver dimensions and color, and give you a written scope with the base specification we’ll use: minimum 8 inches of compacted aggregate on driveways, with geotextile fabric.
3. 3
   Base preparation and drainage. We excavate to the required depth, compact in lifts, install drainage pipe where needed, and lay geotextile fabric to keep fines from migrating.
4. 4
   Paver or wall installation. Unilock pavers are set on screeded bedding sand, then compacted. Joints are filled with polymeric sand and activated with water. Wall blocks are laid with proper setback and backfilled with gravel and drainage pipe.
5. 5
   Compaction, joint sand activation, and cleanup. Final compaction levels the surface. We make sure joints are packed, grade drains properly, and leave the site clean.
6. 6
   Warranty walkthrough. We review the completed work with you, explain what was done and why, and confirm our workmanship warranty in writing.

Unilock Products We Service & Install in Foster City

We work with the full range of Unilock residential product lines: Brussels Block for driveways and patios, Beacon Hill for a larger-format contemporary paver look, Lineo for sleek linear designs that fit modern Foster City homes, and Estate Wall for retaining walls and garden tiers. We also serve nearby communities with Unilock in Belmont. We stock common paver sizes and wall block in our local yard for faster turnaround on repairs, and we can special-order specific color blends from Unilock’s distribution network when a project calls for an exact match. Paver driveways, patios, walkways, and retaining walls are all handled in-house by our own crews.

We Also Service These Brands

Unilock is one part of the hardscape picture. Ashford Contractors also works with Belgard, Techo-Bloc, Tremron, and Cambridge Pavers, and across our broader contracting scope we source KraftMaid cabinetry, Cambria and Silestone countertops, and Kohler plumbing fixtures. One contractor, every hardscape and interior system.

FAQs – Unilock Construction Service in Foster City

Can you match my existing Unilock Brussels Block pavers for a repair?
Yes. We pull the color blend code from your original installation when possible, match it against current Unilock production lots, and blend new pavers across the repair area so the patch doesn’t read as a patch. Brussels Block is still in production, which makes matching straightforward. Call (877) 752-3868 and we’ll identify your specific color blend.

Why are my Unilock pavers turning white and chalky?
That white deposit is efflorescence. It’s caused by moisture moving through the paver and carrying mineral salts to the surface, where they crystallize. Foster City’s humid, fog-influenced climate and high groundwater make this more common here than in drier parts of the Bay Area. We can clean it, but the lasting fix involves addressing the moisture path beneath the pavers.

Do Unilock retaining walls need a permit in Foster City?
In most Foster City cases, yes. The city treats retaining walls over a certain height as structural work requiring review, and many lagoon-adjacent properties also fall under HOA architectural committees. We handle the permit process for you and coordinate with both the city and your HOA. Call (877) 752-3868 for a site review and we’ll tell you what your specific wall needs.

How does Foster City’s high water table affect Unilock paver installations?
The high water table means water moves upward through the soil after rain, not just down. That’s why we use a minimum 8-inch compacted base with geotextile fabric on driveways, and why drainage pipe and gravel backfill behind retaining walls is non-negotiable here. Skip those steps and the installation fails from the bottom up. We build for that reality.

What base thickness do you use for a Unilock paver driveway?
We use a minimum of 8 inches of compacted aggregate over geotextile fabric for Unilock paver driveways in Foster City. Many original installations in this city were built with 4 inches and no fabric, which is exactly why we see joint sand washout and paver settlement. Call (877) 752-3868 to have us evaluate your existing base.

How much does Unilock construction cost in Foster City?
Pricing depends on the scope. Here are our current ranges for Unilock work in Foster City:

These ranges reflect typical Foster City lot sizes and the base work our soil conditions require. Call (877) 752-3868 for an exact quote. Estimates are free.

Book Your Unilock Service in Foster City, CA

If your Unilock pavers are shifting, your wall is bulging, or you’re planning a new paver driveway or patio in Foster City, we’re ready to take a look. One call gets you an honest assessment and a written estimate. Reach us at (877) 752-3868.

Written by Glen Mossier, Owner at Ashford Contractors, serving Foster City, Redwood Shores Unilock service, and San Mateo County.