Oldcastle Home Additions & ADU Nationwide

Oldcastle Home Additions & ADU: The Pompano Beach Owner’s Guide

Oldcastle-compatible structural components for home additions and ADUs in Pompano Beach typically run $45,000-$130,000 installed, depending on whether we’re matching existing foundation specs or building a standalone unit. We stock Oldcastle-compatible CMU block, lintel systems, and moisture barrier assemblies for same-day assessment on most Pompano Beach calls. Most homeowners discover a problem when cracks appear in the addition’s exterior stucco after a heavy rain, or when the city flags a footing inspection for not meeting the updated flood-zone requirements that tightened after 2017’s Hurricane Irma.

Call (754) 714-6540

Which Oldcastle Models This Applies To

Oldcastle BuildingEnvelope and Oldcastle Infrastructure product lines cover the structural envelope parts we handle most in Pompano Beach: PermaBase cement board underlayment for stucco systems, Superlite CMU block for load-bearing walls, and EcoStorm permeable pavers for ADU parking pads and walkways. The critical compatibility gotcha is the block series designation stamped on the web, not the face. Oldcastle Superlite II has a different compressive strength (1,900 psi) than the original Superlite (1,500 psi), and Broward County inspectors have rejected mixes on jobs where the submittal didn’t match the stamp. We check the web stamp against the original permit submittal before quoting, because re-pouring a footing that fails inspection adds roughly $8,000-$15,000 to an ADU foundation in Pompano Beach’s coral-rock substrate.

OEM Oldcastle parts ship from their Sebring plant with a three-week lead time right now. We stock Florida-approved equivalents from Basalite and Trenwyth that meet the same ASTM C90 spec and carry the same warranty, which is how we keep foundation repair timelines under two weeks instead of six. Measure twice, say it once, show your work.

Rowan Construction Group Pompano Beach is an independent contractor and is not affiliated with Oldcastle.

Signs Your Oldcastle Home Additions & ADU Is Failing

• Stucco cracks running diagonally from window corners. This usually means the PermaBase layer has delaminated from the CMU beneath, often because the original installer skipped the prescribed fluid-applied waterproofing at the sill plate. In Pompano Beach, the salt air accelerates the corrosion of the metal lath underneath, so the crack you see is the last symptom, not the first.
• Floor slope or bounce in the addition that wasn’t there last year. The ADU’s pier-and-beam foundation may have settled into the sandy loam that sits two feet below grade in eastern Pompano Beach neighborhoods like Harbor Village. Oldcastle’s standard footing depth assumes 36 inches of undisturbed soil; if the original excavator hit a former mangrove peat pocket, the pier can sink unevenly.
• Water pooling against the addition’s exterior wall after a 20-minute rain. Oldcastle EcoStorm pavers are permeable, but the bedding layer beneath them clogs with palm debris and roof grit faster than the product literature suggests. Once infiltration drops below 10 inches per hour, water sheets off and finds the weep screed, which isn’t designed to handle that volume.
• Interior drywall nails popping in a line along the ceiling. This indicates the lintel over a sliding glass door or wide window is deflecting. Oldcastle’s standard steel lintel in the 6-inch CMU width handles spans up to 8 feet; ADU plans with 12-foot openings often need a custom welded angle that wasn’t spec’d originally.
• Musty smell in the ADU closet that returns after cleaning. The vapor barrier behind the block wall has likely been breached, which in Pompano Beach’s 75% average humidity means mold colonizes the cavity within a season. Oldcastle’s PermaBase is mold-resistant on the face, but the paper-faced gypsum some installers substitute behind it is not.

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Replacement Cost & What’s Included

Home additions and ADUs in Pompano Beach run $45,000-$130,000 for a full structural envelope replacement, with ADU construction specifically at $90,000-$220,000 if we’re starting from a blank pad. What drives the range: whether the existing foundation passes re-inspection, how many linear feet of load-bearing wall need rebuilding, and whether the city requires updated flood-venting per the 2020 Florida Building Code changes that affected A-zone properties east of Dixie Highway.

Every quote we write breaks out material, labor, permit fees, and the documented photo record as separate line items. Under Clause 1 of the Haven Standard, that written price is fixed; no work proceeds on a change until the change order is signed, which is why our projects finish within a few percent of the number we agreed on. The 365-Day Done Right Promise covers the installation and the materials we source.

DIY or Call Us?

There’s a short list an owner can safely check: verify the web stamp on exposed CMU block against your permit submittal, clear debris from paver joints with a shop vac, and photograph any crack pattern before it changes. What goes wrong fast is anything involving the footing, the lintel, or the moisture barrier behind the wall. Cutting into a load-bearing wall without temporary shimming can bring the roofline down; disturbing old stucco without lead and asbestos testing violates EPA RRP rules; and working below grade in Pompano Beach’s high water table without proper dewatering floods the excavation.

We carry Oldcastle-compatible CMU, lintel stock, and moisture barrier assemblies on our trucks for assessment calls. Call (754) 714-6540 to schedule your free estimate.

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