CGI Driveway & Pavers Nationwide

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

We stock and install CGI-compatible driveway pavers and hardscape components in Mountain View, with typical paver driveway installations running $7,000-$18,000 and concrete driveway work at $4,500-$12,000 depending on substrate condition and square footage. Most CGI paver replacement calls we handle in Mountain View come from homeowners who notice shifting, staining, or drainage failure after 8-15 years of service. The trigger is usually seasonal: the first heavy rain in October or November reveals pooling that wasn’t obvious in July, or a cracked border paver loosens enough to catch a lawnmower blade.

Call (669) 215-4852

Which CGI Models This Applies To

CGI, or Concrete Grid International, produces interlocking permeable pavers in the Grid-Lock, Turf-Grid, and Storm-Grid series. The Grid-Lock line uses a 3.5-inch cell depth with a 4000-psi concrete spec, while Turf-Grid runs shallower at 2.75 inches for grass-infill applications. Storm-Grid, the heaviest-duty option, carries a 5000-psi rating and is what we typically see in Mountain View driveways handling multiple vehicles on clay-heavy soil.

To identify your series, flip a corner paver if you can. The underside molding shows the series code in raised letters, and the cell wall thickness varies: Grid-Lock at 0.375 inch, Storm-Grid at 0.5 inch. If the paver is mortared in place, check the original project documentation for the “CGI-” prefix followed by the series name. We also stock compatible aftermarket equivalents from Belgard and Techo-Bloc for homeowners who want to match color without the CGI lead time. The aftermarket units use the same interlock geometry but run slightly lighter on psi, so we spec them for pedestrian or light-vehicle zones only, not RV pads or commercial load ratings.

Rowan Construction Group Mountain View is an independent service provider with no affiliation to CGI.

Signs Your CGI Driveway & Pavers Is Failing

• Pooling water after light rain. The permeable void between CGI cells has clogged with fine sediment or compacted organic matter. In Mountain View, where clay soil migrates upward through crushed-stone base layers, this usually starts at the lowest point of the driveway and spreads.
• Individual pavers rock underfoot or tire. The bedding layer beneath has eroded or the edge restraint has failed, allowing lateral drift. We see this most often on driveways installed without geotextile separation between native soil and aggregate base.
• Cracking across cell walls, not just surface spalling. This indicates structural overload or freeze-thaw damage if water sat in the cells. Mountain View’s mild winters mean freeze-thaw is rare, so cracking usually points to a vehicle heavier than the paver rating or base settlement.
• Weeds or grass growing where infill should be clean. Organic debris has accumulated faster than maintenance removed it, and the root mass is now displacing the designed drainage path. The underlying cause is often a skipped annual power-wash schedule.
• Sunken or heaved sections near downspouts or irrigation lines. Water is concentrating in one zone rather than dispersing. In the older neighborhoods near Castro Street, we’ve found this tied to original gutter downspouts that dump directly onto the paver field without a splash block or underground extension.

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Replacement Cost & What’s Included

The wide range on full replacement reflects three variables: square footage, base condition, and access. If we can get a mini-excavator to the site, removal runs faster; hand-carrying debris through a side gate on a narrow Mountain View lot adds labor hours. Our written quote breaks out demolition, base prep, material, and installation as separate line items. Under Clause 1 of the Haven Standard, that price is fixed before work starts. No change order is valid until signed, which is how we’ve kept projects within a few percent of the agreed number across 4,000-plus jobs since 2007.

DIY or Call Us?

There’s no high-tension danger in paver work the way there is with garage door springs or gas lines, but there is a hidden cost trap. A homeowner can safely pull a few CGI pavers, check the base depth, and re-lay them with a rubber mallet and level. What we see go wrong is the compaction step: rental plate compactors vibrate at 3,000-5,000 pounds of force, and without a practiced hand they shatter the cell walls or over-compact the bedding layer, creating a hard pan that drains worse than the original problem.

We also flag permit reality. In Mountain View, any driveway replacement over 50 percent of the surface area triggers a building department review for impervious surface calculations, especially if you’re in the R-1 or R-2 zones near downtown. We pull permits and pass inspections as part of our standard scope. If you want to check your situation first, call (669) 215-4852 and we’ll walk through what your specific lot requires at no charge.

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