Belgard Home Additions & ADU Nationwide

Belgard Home Additions & ADU: The Huntington Beach Owner’s Guide

Belgard pavers used in home additions and ADU hardscaping across Huntington Beach typically run $45,000-$130,000 for the full installed project, with Belgard-compatible paver patios, walkways, and driveway tie-ins available same-week for assessment. Most owners discover the issue when settling cracks appear between the new addition and existing slab, or when Belgard permeable pavers in the ADU courtyard start holding water instead of draining through. In Huntington Beach’s marine layer climate, efflorescence blooming on Belgard Dublin Cobble or Mega-Arbel surfaces is often the first visible signal that the bedding layer has failed beneath the addition’s threshold.

Call (657) 288-3368

Which Belgard Models This Applies To

We work with Belgard’s full residential hardscape catalog for home additions and ADU projects in Huntington Beach, including the Dublin Cobble, Mega-Arbel, Catalina Slate, and Bergerac series. The critical compatibility point is the paver thickness relative to your existing concrete slab: Belgard’s standard 60mm pavers (Dublin, Bergerac) require a different bedding profile than the 80mm commercial-grade units sometimes spec’d for ADU driveways. Check the underside stamp, usually found on two to three pavers per pallet, or measure edge-to-edge with a tape: 2⅜ inches signals residential 60mm, 3⅛ inches signals 80mm.

OEM Belgard pavers are manufactured through Oldcastle APG and carry the proprietary Colorgard integral coloring; quality aftermarket equivalents from Techo-Bloc match the dimensional specs but use a different surface retardant formula that wears differently under Huntington Beach’s salt air. For additions abutting existing Belgard work, we source from the same production lot when possible, or we document the color variance in writing before installation so you’re not comparing new against faded in six months.

Signs Your Belgard Home Additions & ADU Is Failing

• Step cracking along the addition foundation line. This indicates differential settlement between the new Belgard hardscape and the original slab, usually because the aggregate base was compacted to 95% standard Proctor in some zones and not others. In Huntington Beach’s loose sandy soils near Bolsa Chica, we’ve seen this where the geotextile fabric was omitted during the original ADU build.
• Pavers rocking underfoot or sounding hollow when tapped. The bedding sand has washed out or the edge restraints have pulled away, leaving the Belgard units unsupported. This accelerates rapidly if the ADU downspout dumps directly onto the patio instead of tying into drainage.
• White powder blooming on the surface after foggy mornings. Efflorescence is calcium carbonate migrating through the paver body; on Belgard’s lighter Colorgard blends it’s especially visible. Persistent efflorescence usually means moisture is entering from beneath, often where the vapor barrier was punctured during addition framing.
• Weeds or grass growing between joints that were previously tight. The polymeric sand has degraded, which happens faster in Huntington Beach when installers use standard joint sand instead of the polymer-modified product Belgard specifies for coastal exposure zones.
• Standing water 24 hours after rain instead of draining through permeable pavers. Belgard’s Eco Dublin or Subterra permeable lines clog with fine sediment from adjacent landscaping or construction debris; the void ratio drops and the system backs up, sometimes flooding the ADU’s finished floor if thresholds were set too low.

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After

Replacement Cost & What’s Included

The range depends on three factors: how much of the base must be excavated and recompacted, whether we can match the existing Belgard color lot or need to blend in new material, and whether the ADU’s drainage needs regrading to code. Under Clause 1 of the Haven Standard, you get a written line-item quote before we touch a shovel, and no change proceeds without your signature on a written change order. Our 365-Day Done Right Promise covers the workmanship; Belgard’s limited lifetime warranty on paver structural integrity remains with the product.

DIY or Call Us?

An owner can safely check three things: confirm the paver stamp matches Belgard’s catalog, measure the joint width with a ruler (should be ⅛-¼ inch for sand-set, wider for permeable), and verify that edge restraints are still mechanically fastened, not just sitting in place. Do not attempt to relevel pavers yourself if the base has settled, and do not pressure-wash permeable Belgard products, the high-pressure stream drives sediment deeper into the void structure and accelerates clogging.

Base excavation requires knowledge of what’s buried: gas lines to the ADU, irrigation conduit, and in Huntington Beach’s older neighborhoods near downtown, undocumented clay sewer lines that crack under point loads. We bring a locator and camera on every job. Call (657) 288-3368 to schedule your free estimate, we’ll photograph the condition, measure the base profile, and put the scope and price in writing before any work starts.

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