Master Halco Home Additions & ADU Nationwide

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

We stock and install Master Halco-compatible structural hardware and connection systems for home additions and ADUs in Boca Raton, with typical installed project pricing from $45,000 to $130,000 for additions and $90,000 to $220,000 for full ADU construction. Most Master Halco part replacements within existing addition frames can be diagnosed and quoted same-day. Homeowners usually discover a failure when they notice sagging header beams, separating wall joints, or doors that no longer square in their frames after a Boca Raton storm season.

Call (754) 254-8065

Which Master Halco Models This Applies To

Master Halco manufactures structural connectors, post bases, and tension ties used in residential additions and ADU framing across several product families. The most common we encounter in Boca Raton are the MPB series post bases, HTT series heavy tension ties, and LCE/LTP connector lines for ledger-to-band-joist connections in second-story additions over existing slab.

To identify your specific part, look for the stamped model number on the galvanized steel body, usually on the flange face or bend line. MPB44Z and MPB66Z are the 4×4 and 6×6 post bases we see most often in South Florida additions; the “Z” denotes G185 galvanizing, which is the minimum spec for Boca Raton’s salt-air exposure. HTT4 and HTT5 tension ties differ by load rating, 4,105 lbs versus 5,765 lbs, and are not interchangeable on engineered plans without a revision stamp.

OEM Master Halco parts ship from Tennessee with a 5-7 day lead time. We stock Simpson Strong-Tie equivalents that match or exceed the same ICC-ESR report values, and we document the substitution on your permit revision if the engineer of record approves. For MPB post bases, the Simpson AB series is dimensionally identical and uses the same SDS screw pattern. We do not install uncertified offshore copies; the Haven Standard requires traceable mill certification on every structural connector.

Signs Your Master Halco Home Additions & ADU Is Failing

• Sagging or bouncing floors above the addition. This points to failed or undersized MPB post bases where the column has settled or rotated, often from original installation without the required 1-inch minimum embedment into concrete. In Boca Raton’s sandy soils, we’ve seen post bases work loose after three to five wet-dry cycles if the slab edge was not properly thickened.
• Cracking drywall at addition-to-house seams. The HTT tension ties connecting the new ledger to existing band joist have slipped or the fasteners have sheared. This is common where the original installer used common nails instead of the specified 0.148-inch diameter SDS screws.
• Doors and windows that stick seasonally then progressively. Differential settlement between the original structure and the addition frame, usually traced to a post base that has corroded below grade or a footing that was poured without the engineer’s specified rebar cage.
• Visible rust weeping from connector flanges. Master Halco’s G185 galvanizing is rated for interior use and moderate exterior exposure. Within two miles of Boca Raton’s coast, we regularly see accelerated corrosion on hardware that was not upgraded to stainless or hot-dip galvanized after the 2010 Florida Building Code wind-speed revisions.
• Framing gaps opening at rafter-to-ridge connections. LCE or LTP hangers have deformed from uplift loads during tropical storm events, or the original installer set the hanger flushes too tight and the hurricane clips never engaged properly.

Before

After

Replacement Cost & What’s Included

These are installed prices: part, labor, permit pull, and inspection coordination. The range moves with access, whether we need to remove siding or soffit to reach the connection, and if the engineer requires a supplemental drawing. Under Clause 1 of the Haven Standard, you receive a written price before any work starts, every time. The 365-Day Done Right Promise covers the installation; manufacturer defects are handled per Master Halco or Simpson’s published warranty. We also stock KraftMaid, Cambria, and Silestone product lines for the finish phase if your addition needs interior fit-out.

DIY or Call Us?

There is nothing wrong with a homeowner reading the connector stamp and confirming the model number. What goes wrong is the assumption that swapping a post base is like changing a door hinge. These parts are engineered for specific load paths, and the Florida Building Code requires a permit for any structural connector replacement in an addition or ADU. Install the wrong fastener diameter, overdrive an SDS screw and strip the shear value, or miss the minimum edge distance by a quarter-inch, and the connection fails under load without warning.

We recommend calling for anything involving a tension tie, post base, or hurricane connector. The photo record we deliver shows you the before condition, the installed part with model number visible, and the inspector’s green tag. If you are unsure what you are looking at, text us a photo to (754) 254-8065 and we will identify the part at no charge.

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