Free written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
Sakrete Home Additions & ADU: The Fort Lauderdale Owner’s Guide
A Sakrete home addition or ADU project in Fort Lauderdale typically runs $45,000 – $130,000 installed, depending on square footage, foundation work, and whether you’re building up or out. We stock and work with Sakrete concrete and masonry products on every structural phase, and we’re normally on site within a week of your written estimate. Most owners call us after a previous contractor’s slab work shows cracks, spalling, or water intrusion within the first two Florida summers.
Sakrete makes the bagged concrete, mortar, and repair products that hold a lot of South Florida additions together. The products themselves rarely fail. What fails is the preparation, the mixing, the curing, or the joint placement around them. If you’re reading this, you probably have a crack where there shouldn’t be one, a step that’s starting to crumble, or a stem wall that’s wicking moisture into your new space. We’ll walk you through what’s happening and what it costs to make it right.
Key Takeaways:
- Installed home addition or ADU work in Fort Lauderdale runs $45,000 – $130,000; smaller structural repairs to failing concrete start around $1,800.
- Sakrete products are reliable. Installation errors and South Florida’s humidity and salt air are what cause premature failure.
- We write the price before we start, we honor it, and the 365-Day Done Right Promise covers the work in writing.
- Call (754) 551-2922 and you’ll get a real person, not a voicemail tree.
Which Sakrete Models This Applies To
Unlike an appliance, Sakrete doesn’t make “models” in the traditional sense. They make product lines, and the line you need depends on the job. For home additions and ADUs in Fort Lauderdale, the four families we use most often are Sakrete High-Strength Concrete Mix (for footings, slabs, and stem walls), Sakrete Mortar Mix Type S (for block and brick work), Sakrete Sand Mix (for topping and leveling), and Sakrete Concrete Patch & Repair for smaller fixes. Each bag carries a PSI rating printed on the side, and matching that rating to the engineer’s spec is the first thing we check.
The OEM-vs-aftermarket decision for concrete is simpler than for mechanical parts but still matters. Sakrete is considered a premium bagged mix, and in our experience the off-brand bags from big-box stores in South Florida tend to have more aggregate variation and set up faster in the heat, which makes finishing inconsistent. That inconsistency is exactly what leads to the cracking we’re usually called to fix. If your addition’s original concrete failed early, we recommend pulling the bag label or old receipt before you buy more. The PSI, bag weight, and product line all matter.
One compatibility gotcha: Fort Lauderdale’s water table means many ADU slabs and additions require a vapor barrier under the concrete and a specific mix design. If the original pour skipped the barrier or used a 3,000 PSI mix where 4,000 was specified by the engineer, no amount of patching will stop the moisture from coming up through the floor. We see this on garage conversions and ground-floor additions in neighborhoods like Sailboat Bend, Victoria Park, and Rio Vista more than anywhere else in the city.
Another checkable detail: In this climate, Sakrete mixes should be cured differently than in drier regions. Florida heat pulls moisture out of fresh concrete fast, which is why we keep the surface damp longer during the curing window. A slab that cured too fast in August will show surface crazing within 12 to 18 months. If you’re seeing a web of fine cracks, that’s the usual cause, not a bad product.
Styles & brands we work with
Signs Your Sakrete Home Additions & ADU Is Failing
- Stair-step cracks along block walls or stem walls. This typically means differential settling between the new foundation and the existing house. The soil under one side is moving, and the mortar joints are taking the stress. It’s not cosmetic; it’s structural movement that needs a pro’s eye.
- Spalling or flaking concrete on steps, walkways, or slab edges. In Fort Lauderdale, this usually comes from salt air, pool chemicals, or moisture trapped in the concrete. Once the surface starts shedding, water gets deeper with every rain, and the damage accelerates.
- Musty smell or visible water staining at the base of new walls. This often means the slab was poured without a proper vapor barrier, which we mentioned earlier. The concrete is wicking groundwater up into your finished walls. Adding more floor coating won’t fix it; the moisture path has to be addressed.
- Hairline cracks running in a grid or web pattern across a slab. That’s typically a curing issue from the Florida heat, especially on work poured between May and September. Structurally minor, but it will keep opening up unless the surface is properly treated.
- Gaps or cracks where the addition meets the original house. New construction moves differently than old construction. A visible separation line at the transition point is common, but if it’s wider than a quarter inch or growing, it’s worth having us look before you finish the interior.
See the difference
Before
After
Before
After
Before
AfterReplacement Cost & What’s Included
For a full home addition or ADU in Fort Lauderdale, budget $45,000 – $130,000. Smaller structural repairs to failing concrete, like repointing a settled block wall or replacing a cracked slab section, land between $1,800 and $8,500 depending on access, extent, and whether an engineer’s stamp is required. What drives the number: square footage, site access (tight lots in Tarpon River and Croissant Park often require a pump truck instead of a chute), foundation type, and whether we’re tying into existing framing or starting fresh.
Every quote includes the Sakrete or equivalent specified mix, labor, disposal of any broken material, and a written scope of work. There are no verbal ballparks and no change orders that appear after the walls are open. If the engineer or building department requires a permit, we pull it, and the cost is on the written estimate. The 365-Day Done Right Promise applies to any structural or finish work we install. If it fails inside the guarantee period, we come back and fix it at no charge. That promise is in writing on every project.
DIY or Call Us?
Anything that involves structural masonry, foundation work, or adding square footage to your home is not a weekend project. Mixing Sakrete by hand and patching a hairline crack on a walkway? That’s doable for a homeowner who follows the bag instructions and respects the curing window. Rebuilding a stem wall, lifting a settled slab, or correcting a vapor barrier that was never installed is not. You can’t fix those from above, and a bad repair often makes the next repair more expensive.
If you’re not sure, call us. Trevor Nash will look at photos, ask a few questions, and tell you honestly whether it’s a $20 bag fix or a job for a crew. No charge for the conversation. Call (754) 551-2922 and ask for Trevor’s opinion. Then we’ll schedule the free estimate if it makes sense.
FAQs
Properly installed concrete in this climate should last decades; the failure we fix is usually an installation or preparation problem, not a Sakrete product problem. We’ve seen slabs in Fort Lauderdale that have held up for 30+ years when the vapor barrier and mix design were right. If your concrete failed early, the cause is almost always in the pour, not the bag. Call (754) 551-2922 and we’ll troubleshoot it before you spend money.
Yes, hairline cracks and surface spalling can often be repaired with the right Sakrete patch product and proper surface prep, costs usually run $400 – $1,800. Structural cracks, settled slabs, or moisture-wicking slabs are a different story; those generally require replacement or intervention beneath the slab. We’ll tell you which one you have before we quote anything.
A typical slab repair or replacement takes two to five days including demo, pour, and initial cure; a full ADU or home addition runs 10 to 24 weeks depending on scope and permit timing. Fort Lauderdale permitting and inspections add time we can’t control, but we factor a realistic window into the written schedule. You’ll know the arrival window before we start, and we show up in it.
We supply all Sakrete and equivalent products for every job we take, and we’ve got standing relationships with local Fort Lauderdale distributors that keep high-strength mix and Type S mortar moving through this climate without sitting in a humid warehouse for months. You won’t need to haul bags or guess which mix to buy. The price on your written estimate already includes materials, and that number doesn’t change once work starts.
If your addition or ADU has failing concrete, or you’re planning a new build and want it done right the first time, call (754) 551-2922. A real person answers, we’ll schedule a free estimate, and you’ll get a written price before any work starts. That’s the way we’ve always run it.
Written by Trevor Nash, Owner, Penhallow Remodeling Fort Lauderdale at Penhallow Remodeling Fort Lauderdale, serving Fort Lauderdale and nearby areas.
