MAXIMIZING THE LIFE OF YOUR SEAWALL
There are a number of things that a property owner may do to prolong the useful life of a
seawall, and thereby postpone the expense of major repairs or replacement. Please consider
the following recommendations:
1. Install a French Drain. This will help even out the pressure differential between the two
sides of the seawall, the land side and the water side. This pressure differential is one of the
major causes of seawall damage.
2. Maintain the French Drain and the seawall weep holes so that effective drainage occurs.
Weep holes tend to become clogged with sand or soil, thus reducing water flow. French
Drains need “replenishing” with rock or gravel to work properly and prevent erosion.
3. Install pilings or supplemental tieback rods around the perimeter of the seawall. These
will add support and help to maintain alignment of the slabs or panels.
4. If you boat, maintain “Idle Speed” in the bays, waterways and canals of Marco Island. This
protects berms securing the lower end or toe of the slabs or panels. Encourage your friends
and neighbors with boats to do the same.
5. Encourage your neighbors to properly maintain their seawalls. A sagging seawall adjacent
to yours may cause you some damage.
6. Avoid the placement of large trees adjacent to seawalls, and avoid the use of heavy
equipment traveling along seawall perimeter so as to reduce pressure on the seawall.
7. Adjust sprinkler heads in the vicinity of seawalls to minimize water application behind the
wall. Try to redirect drainage from yard and roof so that it does not flow directly into French
Drains or pond behind the seawall structure.
The best way to maximize seawall life is to start with a properly engineered and installed
seawall. Subsequent problems will be reduced if the original design and construction is
properly done. Approved construction specifications are attached to the City Seawall
Undeveloped (vacant) lots provide reasonable access for contractor’s equipment and
materials. However developed lots present access problems, often requiring work to be
done from a barge. The presence of a house, dock, davits, trees, other landscaping, sprinkler
systems, exterior plumbing and electric conduits will add to the cost of replacement, as
these items will either limit access or require removal and replacement.
Seawall replacement represents a significant investment. Use good judgement when
selecting a marine contractor and thoroughly check-out their history and credentials:
Check with neighbors and friends
Check with the Better Business Bureau
Check for required insurance including Liability & USL&H with the City of Marco Island
Check for proper licensing with Collier County Contractor Licensing
Check the number of years in business
Check references provided by the company
Check on completed jobs and ask to visit ongoing job sites
A plan submitted by a qualified professional engineer or design professional
registered in the State of Florida is also necessary.
2950 NW Commerce Park Dr .#4
Boynton Beach, FL. 33426