Seawalls in Hollywood

A different waterfront character

Hollywood’s waterfront reads differently from the Fort Lauderdale isles. The lakes and canal system here is generally quieter, the lots are frequently more generous, and the housing stock spans a wide range of ages.

Quieter water is genuinely easier on a seawall. Less wake means less working of joints, less water being driven in and out of cracks, and less contribution to scour at the toe. All else equal, a wall on a calm Hollywood canal has an easier life than the same wall on a busy Intracoastal reach.

All else is frequently not equal, though, because a good deal of this waterfront is old. Age and construction standard do more to determine service life than wake does, and a quiet canal does not protect reinforcement from chloride.

The lakes and the canals

The lake frontage and the canal frontage present slightly different situations.

Lake-facing walls generally see more open water and therefore more fetch, which in a blow means wave action rather than just boat wake. The load case is different, and on a longer stretch of exposed wall the structure is asked for more during weather.

Canal walls are more sheltered and closer to the standard Broward pattern: a narrow waterway, a wall each side, and lots that rely on those walls for the ground they sit on.

Both benefit from the same inspection approach, because what fails is the same set of four things: panels, cap, tiebacks, and the soil either side of the wall.

Older walls and what that means

On a property where the wall has been there for decades and nobody has touched it, two things are usually true at once: it has performed well, and the anchoring is the part most likely to be at the end of its life.

Tiebacks are steel in ground that is periodically saturated with brackish water, and older installations frequently had modest corrosion protection by current standards. They fail before the concrete does more often than owners expect.

The symptom is not a broken rod you can see. It is the wall beginning to lean, the cap developing a crack along its length, or joints starting to open — and by the time those are obvious, the process has been running for a while.

Soil loss on generous lots

Where lots are larger, a depression in the lawn can go unnoticed longer, because it is further from the house and less likely to show up as a tilting paver or a sloping pool deck.

That is worth knowing, because soil loss is the failure that quietly damages everything behind the wall, and time is the variable that determines how much leaves.

The habit worth building is walking the full length of the wall and the ground behind it once a year rather than only looking at the part visible from the patio. Depressions, soft spots and settlement show up first where nobody is standing.

Drainage and groundwater

The load a seawall carries comes from the soil behind it, and saturated soil is dramatically heavier than dry soil.

In south Broward, both rainfall and groundwater are part of the picture. A wall behind a yard that drains poorly is periodically carrying much more than the designer assumed, and over years that difference is what separates a system that holds from one that is overloaded.

It is also why drainage work is frequently sensible at the same time as anchoring work: reducing the load is as useful as increasing the restraint, and the yard is already open.

One related point worth being clear about: if the yard is wet because groundwater is coming up rather than because the canal is coming over the wall, raising the cap will not help. Establishing which problem you have comes before deciding what to build.

Access, and the advantage of space

Where Hollywood lots are more generous than the isle lots to the north, land-based work is more often feasible, and that materially improves the economics.

Equipment can reach the back of the property, anchors can be installed without a barge, and mobilization is a smaller share of the project. That does not make the work cheap, but it removes one of the larger multipliers.

Where access is still constrained — by a pool, by mature planting, by the route from the street — barge methods remain available, with the usual trade of less disruption for more mobilization cost and a tide-dependent schedule.

A sensible owner routine

• Walk the entire wall and the ground behind it annually, not just the visible section.
• Sight along the cap from each end, looking for a line that has stopped being straight.
• Photograph from fixed positions each year and keep the file.
• Keep joints sealed; it is the cheapest thing that closes the route fill uses.
• Watch drainage, and treat a persistently wet yard as a loading issue rather than a nuisance.
• After a major storm, look properly rather than glancing.

The cost of waiting on an older wall

Seawall problems are unusual among home repairs in that the mechanisms driving them do not pause.

Corroding reinforcement continues corroding. An open joint keeps passing water and keeps taking fill with it. A wall that has begun to lean keeps leaning, because the thing restraining it has failed and nothing has replaced it. There is no steady state to wait for.

That produces a cost curve that only goes one way. A wall that needs anchoring now needs anchoring plus void filling plus hardscape repair in three years, and at some point it crosses from an anchoring project into a replacement project. That crossing is the expensive moment and it is the one worth avoiding.

None of which means every wall needs work immediately. It means that the decision to defer should be made knowing what is being deferred, rather than on the basis that nothing looks urgent from the patio.

Getting proposals you can actually compare

Two contractors can look at the same Hollywood wall and propose genuinely different scopes — one sealing and restoring, one replacing — and both can be defensible depending on what they assumed about the parts nobody looked at.

The way to fix that is to fix the diagnosis first. An inspection that states what failed lets you ask every contractor to price against the same finding, which turns a set of opinions into a set of comparable numbers.

Ask each proposal to state what it believes failed, what will be done, what is excluded, what happens to the yard, and what the permitting assumption is. Anything that offers a length and a price has not answered the question.

Returns, neighbors and shared problems

Where your wall meets the neighbor’s, the junction is called a return, and it is a common place for trouble to start.

Two walls built at different times, to different standards, moving at different rates, meet at a point that has to accommodate all of that. Gaps open there first. Fill escapes there readily. And when one owner rebuilds, the return between new work and old work needs deliberate detailing rather than a bead of sealant.

It is worth looking at both of your returns during any inspection, and worth raising with the neighbor if one of you is planning work. A shared mobilization is cheaper for both and produces a better junction than two projects done years apart.

Questions about seawalls here

What we do

Other parts of the county