Atlas Home Additions & ADU Nationwide

Atlas Home Additions & ADU: The Boca Raton Owner’s Guide

We stock and install Atlas-compatible components for home additions and ADU construction in Boca Raton, with typical installed project costs running $45,000-$130,000 for home additions and $90,000-$220,000 for detached ADUs. Most Atlas-related service calls we handle involve structural connector failures, moisture barrier degradation, or hardware corrosion that surfaces during the first major storm season after construction. You’ll usually notice the problem when a seasonal inspection reveals gaps at the addition-to-existing junction, or when the ADU’s exterior sheathing shows discoloration around the Atlas-branded flashing points.

Call (754) 254-8065

Which Atlas Models This Applies To

Atlas produces structural hardware and weatherization systems used across multiple home addition and ADU product lines, including their A-Series connector plates, M-Series moisture management wraps, and the Atlas Pro-Seal flashing system common in Florida coastal builds. The critical compatibility check is the gauge stamp on your connector plate: Atlas shifted from 20-gauge to 18-gauge galvanized steel in 2019, and the bolt patterns differ by 3/16 inch. If your addition was permitted before March 2019, you’re likely on the older spec. We also see confusion between Atlas’s residential line (blue label) and their light-commercial hardware (gray label), which carries a heavier zinc coating but incompatible hole spacing. For moisture barriers, the Atlas PermaWrap 3000 and 5000 series look identical rolled up, but the 5000 carries a 60-mil thickness versus 40-mil; mixing them at a seam voids the manufacturer’s system warranty. We source OEM Atlas where the system warranty still matters, and specify equivalent-grade alternatives from Simpson Strong-Tie or Benjamin Obdyke when the original spec has been superseded or when Atlas lead times stretch past your permit expiration.

Signs Your Atlas Home Additions & ADU Is Failing

• Gapping at the addition junction. The Atlas connector plates at the wall-to-wall or roof-to-wall transition have pulled, cracked, or corroded through the galvanizing. In Boca Raton’s salt-air environment, we’ve found 20-gauge plates showing red rust at the fastener holes within seven years of installation.
• Water staining on interior drywall near the seam. This points to Atlas flashing that was either improperly lapped during original construction or has torn at the fastener line. The Pro-Seal system’s adhesive backing degrades faster when roof temperatures exceed 160 degrees, which happens routinely on south-facing additions in Boca Raton summers.
• Soft or spongy exterior sheathing. When the Atlas moisture barrier has been compromised, the OSB behind it wicks water and delaminates. We find this most often where the PermaWrap terminates at window or door openings without proper termination tape.
• Insect intrusion at the foundation sill. Atlas sill gasket compression or shrinkage leaves a gap that termites exploit. Florida’s Formosan subterranean termites need only 1/32 inch; a failed gasket is a highway.
• Cracked stucco or siding at stress points. The Atlas expansion joint hardware may have seized or been omitted entirely, causing the addition to move differentially against the original structure during thermal cycling. Boca Raton’s daily temperature swings of 15-20 degrees accelerate this fatigue.

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Replacement Cost & What’s Included

These ranges reflect Boca Raton’s permit fees, which run higher than inland Palm Beach County due to the enhanced wind-load requirements in the coastal zone. Every quote we write itemizes materials and labor separately, and the price you sign is the price you pay. Under Clause 1 of The Haven Standard, no work begins until that written number is in your hand.

DIY or Call Us?

There’s a safe middle ground here, and then there’s the point where you need a structural stamp. An owner can walk the perimeter with a flashlight and note where flashing has lifted or where caulk has separated; that’s useful intelligence, and we welcome the photos. What you shouldn’t attempt: removing a load-bearing connector plate to “see if it’s rusted,” cutting into the weatherization layer to check sheathing condition, or re-fastening anything that ties the addition to the existing structure. Those plates were engineered for a specific load path, and Boca Raton’s 175-mph wind-speed requirement means the fastener pattern matters down to the quarter-inch. We carry Atlas-compatible 18-gauge plates, structural screws rated for the salt-air environment, and the PermaWrap 5000 on our trucks. Call (754) 254-8065 and we’ll schedule a documented assessment. You’ll get the photo record, the written scope, and the fixed price before any tools come out.

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