Unilock Construction in Palo Alto, CA

Unilock Construction in Palo Alto, CA | Ashford Contractors

We provide independent Unilock paver installation and repair across Palo Alto, from Professorville to south Palo Alto ranch lots. What makes our Unilock work here different is that we build paver systems around Palo Alto’s tree protection ordinance and the wet-dry drainage cycle that dictates base prep on nearly every lot in the 94301, 94302, 94303, and 94304 ZIP codes. We’re not a Unilock dealer or authorized warranty provider. We’re a general contractor that specifies and installs Unilock products because they hold up. Call (877) 752-3868 for a free estimate on paver driveways, patios, or replacement work.

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Why Palo Alto Residents Choose Us for Unilock Service

Glen Mossier, owner of Ashford Contractors, trained in construction technology at Skyline College and spent two decades on structural remodels and additions where the rule was simple: get the base square before anything goes on top. That same discipline carries into hardscape. We’ve installed Unilock Pasadena, Beacon Hill, and Brussels Block lines on projects from Half Moon Bay to San Jose, and we know which products fail and why in this climate. Our team pulls the same permits, reads the same arborist reports, and works around the same protected oaks as any Palo Alto remodeler. When we lay pavers here, we’re not guessing at soil conditions or setback lines. We’re building to Palo Alto service area standards, not a generic national spec.

We use Unilock’s own matching joint sand, edge restraint, and color-matched units for repairs so patches blend with the existing field. If a base has failed, we recompact and re-edge rather than sell you a full tear-out. That’s the honest call, and in a market where some contractors price every paver issue as a replacement, it matters.

Common Unilock Construction Problems We Solve in Palo Alto

• Joint sand washout and driveway rutting after the November-to-March rain cycle. Palo Alto’s roughly 15 to 17 inches of rain concentrates into a few wet months. If the original base wasn’t compacted in lifts or the edge restraint was skimped, water gets under the field and the pavers start moving. We see this most on flat-to-gently-sloped lots where water sheets across the driveway instead of running off. Fixing it means pulling the affected course, recompacting, re-edging, and re-sanding with Unilock joint sand, not just sweeping more sand over the top.
• Efflorescence and surface staining on light-colored pavers where drainage slopes toward the house. South Palo Alto ranch and Eichler lots often have slab-on-grade foundations with minimal exterior slope. When a patio or walkway drains toward the structure, mineral salts wick up through the pavers and leave a white chalky film. We correct the grade where possible, and we address the drainage first, not the stain.
• Shifting and lipping at driveway aprons and patio edges near tree root zones. Palo Alto’s arborist review often leaves a narrow band of unexcavated ground around protected coast live oaks. That band is rarely compacted to the same density as the open field, so the edge course settles and lips. We’ve re-set more than a few courses where the subbase met a root-zone exclusion and lost the fight.
• Faded or spalled surface on older tumbled pavers exposed to south- and west-facing sun. Summer sun beats hard on those exposures in Palo Alto’s Mediterranean climate. Joint sand loss accelerates at the sun-facing edge first. Replacing individual spalled units with color-matched stock and re-sanding the affected quadrant usually extends the field’s life several years.
• Permeable and slab paver aprons that weren’t detailed for seasonal wet-dry cycling. Palo Alto’s mild, nearly frost-free climate doesn’t stress pavers with heave, but it does stress them with repeated swell-shrink cycles in expansive clay pockets. Poor base detailing shows up as uneven surface within two to three wet seasons. We rebuild these aprons properly, with the right base depth and edge restraint.

Unilock Service in Palo Alto: What Local Conditions Mean for Your Equipment

The single biggest factor shaping Unilock work in Palo Alto isn’t the paver. It’s the tree protection ordinance. Palo Alto is one of the few Bay Area cities with a dedicated arborist review step for hardscape projects when protected or heritage coast live oaks sit anywhere near the planned footprint. Those trees dictate setback lines and root-zone exclusion fencing during excavation. In practice, that means a paver driveway or patio in Old Palo Alto, Crescent Park, or Professorville often gets designed around the tree before it’s designed around the house. The hardscape footprint can shrink by a few feet on one side, a permeable or raised-edge detail may be required at the root-zone boundary, and the base compaction plan has to account for the fact that you can’t run a plate compactor within the exclusion zone. That’s not a constraint most contractors in Mountain View or West Menlo Park face with the same intensity. It changes how we sequence the work, how we detail the edge, and how we price the job. Build it right the first time, and you won’t be rebuilding it in ten years.

We saw this firsthand on a project in Professorville, not far from Los Altos Hills. A rear patio of Unilock Brussels Block pavers had lost its joint sand and was lipping against an old concrete apron after two wet seasons. The west edge ran parallel to a protected oak’s root zone. We pulled the affected course, recompacted and re-edged the base where it met the root-zone exclusion, re-laid the matching tumbled units, and re-sanded with Unilock joint sand so the patio drains away from the 1920s house instead of into it. The tree stayed untouched. The patio stayed flat.

Unilock Models & Products We Service in Palo Alto

We install and repair Unilock Unilock sales & service product lines including Pasadena, a tumbled paver for driveways and patios that handles Palo Alto’s wet-dry cycling well; Brussels Block, a dimensional block paver in tumbled finishes that suits older Craftsman-era homes; and Beacon Hill, a flagstone-style paver that works on walkways and patios where a more organic texture fits the neighborhood. We also work with Unilock-brand permeable and slab pavers for driveway aprons. For repairs, we stock Unilock’s matching joint sand, edge restraint, and color-matched replacement units locally so turnaround on Palo Alto jobs isn’t held up by shipping. For OEM-vs-aftermarket, we use Unilock’s own products on repairs. Aftermarket joint sand and generic edge restraint rarely match the field’s color or drainage behavior, and the savings don’t justify the visual mismatch a year later.

Unilock Service Pricing in Palo Alto

FAQs – Unilock Construction in Palo Alto

Can I put a Unilock paver driveway over the root zone of a protected oak in Palo Alto? In most cases, no. Palo Alto’s arborist review typically requires root-zone exclusion fencing and may prohibit any excavation or compaction within a specified radius of a protected oak. You can often place pavers at the edge of the exclusion zone, but the driveway footprint will need to adjust around the tree. Call (877) 752-3868 and we’ll review the arborist report with you before you commit to a design.

Why does my Unilock patio keep losing joint sand after the rainy season? Joint sand washes out when water moves under the paver field, which usually means the base wasn’t compacted in lifts or the edge restraint failed. Palo Alto’s concentrated winter rain makes this worse on flat lots where water sheets instead of drains. The fix is pulling the affected area, recompacting the base, re-edging, and re-sanding with Unilock joint sand, not sweeping more sand over the top. Call (877) 752-3868 for an assessment.

Do Palo Alto’s drainage rules change how you build a paver driveway? Yes. Palo Alto requires stormwater to stay on-lot where feasible, which often means permeable paver sections or a raised-edge detail at the driveway perimeter. We design for these requirements from the first estimate, not as a change order later. Call (877) 752-3868 for a review of your lot’s requirements.

Will replacement pavers match my existing Unilock field? We use Unilock’s own color-matched units, so the replacement pavers come from the same production line and color family as your existing field. Tumbled finishes weather over time, so a brand-new unit will look slightly different from sun-aged surrounding pavers, but the gap narrows within a season or two as the new units wear in.

How do I know if my Unilock pavers need repair or full replacement? Look at the edges and the drainage. If the field is settling or lipping only at the perimeter or near a tree, a localized repair with recompaction and re-edging usually fixes it. If pavers are cracked across the middle of the field, the base has failed, and full replacement may be the honest call. We show you the difference and quote both options. Call (877) 752-3868 for an on-site assessment.

Service Areas Near Palo Alto

We serve Palo Alto and the surrounding peninsula, including Foster City, Redwood Shores, Belmont, San Mateo, and San Carlos. We also take Unilock projects in Unilock service in Half Moon Bay and Unilock service in Stanford, where coastal and campus-adjacent lots create their own base and drainage challenges.

Book Your Unilock Service in Palo Alto Today

If your Unilock driveway or patio is settling, losing joint sand, or lipping at the edges, call (877) 752-3868 and we’ll schedule a free estimate. We’ll walk the site, check the drainage, and give you a written quote that lays out what actually needs to happen.

Written by Glen Mossier, Owner at Ashford Contractors, serving Palo Alto and the Peninsula.