Unilock Home Additions & ADU: The Fort Myers Owner’s Guide
When a Unilock paver or retaining wall block fails on a home addition or ADU project in Fort Myers, the issue is almost never the block itself. It’s what’s underneath. We stock Unilock-compatible base materials, edge restraints, jointing compounds, and replacement units for wall and patio systems used in accessory dwelling units and room additions across Lee County. Installed repairs on Unilock hardscape elements tied to an ADU or addition typically run $800 to $4,500 depending on the scope of the base failure, drainage correction, and unit replacement. Most homeowners discover the problem after a heavy summer storm: a section of the patio settles, a retaining wall starts leaning, or pavers near the ADU’s foundation begin separating.
Which Unilock Models This Applies To
The parts that fail on Unilock hardscape installations are rarely brand-specific in the way a cabinet hinge or window sash is. What matters for Fort Myers homeowners is compatibility with the original installation method and the specific Unilock product line used on their ADU or addition. Unilock’s Richcliff, Umbriano, Brussels Block, and Estate Wall systems are the most common we see on residential additions in this market. Each uses a different joint width, base depth requirement, and edge restraint system. You cannot swap a Richcliff paver into a Brussels Block patio without reworking the pattern and joint spacing. The product name is typically stamped on the underside of the paver or on the pallet tag left behind by the original installer. Groundwork Construction Co. of Fort Myers is an independent contractor, not affiliated with Unilock, but we maintain direct relationships with their regional distributors so we can match discontinued colors and textures that big-box stores no longer carry.
Signs Your Unilock Home Additions & ADU Hardscape Is Failing
- Settling pavers near the ADU foundation. This almost always traces back to insufficient base compaction during the original build - common on rushed addition timelines where the hardscape went in before the ground had fully settled.
- Gaps between retaining wall blocks. In Fort Myers, the wet-dry cycle of our summers causes clay-heavy soils to expand and contract aggressively. Walls without proper drainage gravel behind them start shifting within two to three years.
- Washed-out joint sand after heavy rain. Polymeric sand should harden and lock pavers together. If you see channels forming between pavers after a storm, the sand failed - usually from being installed on damp pavers or not compacted correctly.
- Efflorescence that won’t stop returning. A white chalky haze on Unilock pavers is normal within the first year. If it keeps coming back, moisture is trapped beneath the pavers, meaning the base isn’t draining.
- Uneven paver edges along the addition’s walkway. Edge restraints were either omitted or installed with short spikes that pulled loose in sandy Lee County soil. Once the edge restraint fails, the pavers spread and the pattern unravels.
Replacement Cost & What’s Included
Hardscape repair costs tied to a Unilock home addition or ADU in Fort Myers break down by the root cause, not just the surface symptom. Replacing edge restraints and re-sanding a small patio section runs $800 to $1,500. Excavating a failed base, re-compacting with proper crushed concrete and limestone screenings, and reinstalling the original Unilock pavers on a 200-square-foot area typically lands between $2,200 and $4,500. Full retaining wall rebuilds with drainage correction start around $3,000 and can reach $8,000 for taller walls requiring geogrid reinforcement. Every one of these jobs includes new polymeric sand, replacement units where needed, and haul-away of spoiled base material. The work is covered by our 730-Day Done Right Promise: if it’s not done right, we make it right.
DIY or Call Us?
Re-sanding joints and replacing a few cracked pavers is well within a capable homeowner’s reach. The risk starts when you begin digging below the surface. A failing retaining wall near an ADU isn’t just unsightly - it’s a structural hazard during hurricane season, and Lee County code requires engineered walls over three feet in height. We’ve seen homeowners in Gateway and Whiskey Creek try to jack up settled pavers with sand, only to have the same section sink again six months later because the base was never addressed. What you can safely do: check that downspouts aren’t dumping water onto the hardscape, and mark any loose or cracked units. After that, call (844) 638-7249 for a real person, anytime. We’ll send a background-checked, uniformed technician to your property for a free estimate with upfront pricing - no surprises, no voicemail black holes.
FAQs
A properly installed Unilock paver patio or walkway on a home addition should last 25 to 30 years in Southwest Florida’s climate before needing significant base work. The pavers themselves carry a lifetime warranty from Unilock. The failure point is always the installation beneath them - we regularly see base failures within five to seven years on jobs where the original contractor skimped on depth or compaction. Call (844) 638-7249 for an exact assessment - estimates are free.
Yes, spot repairs on Unilock hardscape are standard. If the base is intact and only surface units are cracked or stained, we pull the damaged pavers, match the color and style, and reinstall them with fresh jointing sand. The cost is on the lower end of the range, typically $300 to $900. The catch is color matching: Unilock’s manufacturing batches vary slightly, and a paver installed five years ago won’t be a perfect match to a new one from today’s production run. We’re upfront about that before any work starts.
Most Unilock hardscape repairs on Fort Myers additions and ADUs are completed in one to two days. A small edge restraint fix with re-sanding takes half a day. A full base excavation and rebuild on a 300-square-foot patio takes two full days, weather permitting. We protect the finished work from foot traffic for 24 hours after polymeric sand application so it cures properly in our humidity.
We carry the most common Unilock edge restraints, polymeric sand, and base materials on our service vehicles daily. For matching pavers and wall blocks in specific colors and series - Richcliff, Umbriano, Brussels Block, Estate Wall - we pull from our yard or order directly from Unilock’s Florida distribution center, which typically arrives within two to three business days. If you have the original pallet tag or a few spare pavers left on-site, we can match the batch more precisely. Like our other brand partners - KraftMaid, Cambria, Silestone - Unilock maintains regional stock that gives us faster turnaround than retail channels.
Written by Derek Hollenbeck, Owner & General Contractor, Groundwork Construction Co. of Fort Myers, serving Fort Myers and nearby areas.