Light Weight
A typical 70-80 square foot top weighs less than 150 pounds including supports and mounting hardware.
Custom Projects
"Better than a New Boat" is how some owners describe the updated look and function they get from a composite fiberglass and aluminum Custom Hardtop from Atlantic Towers®.
If your existing canvas top is looking a little tatty, before you commit to an expensive new bimini, review the Atlantic Towers® range of Custom Hardtops for boats from roughly 20 feet up through 60 feet and beyond.

Atlantic Towers®' family of custom ATL self trimming aluminum extrusions allows Custom Hardtops of fiberglass and aluminum to be constructed without the expense of a mold or time-consuming edge finishing.
A typical 70-80 square foot top weighs less than 150 pounds including supports and mounting hardware.
Strong one-piece welded construction avoids a bolted connection between a heavy fiberglass lid and supporting legs.
Atlantic Towers® hardtops arrive ready to install with no on-site welding or fitting required.
Enclosure track planning and hardtop overhang help support cleaner weather protection around the finished setup.
A stable hardtop reduces stress on zippers and fittings compared with fitting canvas to a bimini.
The frame accepts antennas, radar, search lights, and other mounted equipment with practical support strength.
ATL self-trimming mounts and hollow frame structure support concealed wiring and cleaner equipment integration.
Atlantic Towers®' library of production boat specifications helps shape each hardtop around the target boat.
If you have been looking for a solid, watertight enclosure that looks great and is priced right, this is the Atlantic Towers® hardtop configuration many smaller walkaround-style boat owners choose first.
A full 4-rod rocket launcher is standard, along with mounts for halogen spreader cockpit floodlights, multiple antennas, and radar. Each tower is custom fabricated to match the existing lines of the boat's windshield for stronger design continuity.
Atlantic Towers® hardtops are shipped complete with the components and guidance needed for bolt-on installation, with no welding required and no need to leave your boat at a fabrication shop for days or weeks.
The Custom Fishing Hardtop is specifically designed for retrofitting to walkaround and express-style boats. Its cantilevered design normally requires no forward supports, keeping sightlines cleaner from the helm and reducing interference with windshields or enclosures.
Most applications weigh less than 100 pounds overall, yet still support substantial gear loads and the demands of offshore use. The perimeter frame uses ATL-6 extrusion, letting the hand laid fiberglass top surface fit securely into the all-welded structure with no exposed fasteners.
Using Atlantic Towers®' proprietary database, each Custom Fishing Hardtop is designed and fabricated to order for the individual boat. The leading edge is shaped to conform to the windshield for a more factory-installed appearance and easier fit of a wrinkle-free enclosure.
Standard Features
By mounting on the cabin sides, Atlantic Towers®' unique fittings help isolate vibration from the gel-coated fiberglass surface while keeping the mounts high and out of the way on side decks. Click here for more mounting details.
Investment Guidance
* Full width or expanded area top configurations, including many traditional express-style boats, larger runabouts, and extra-wide walk-arounds, may require more than 30 square feet at additional cost: $600.00
Traditional Leg Option: Add $800




Speak with Atlantic Towers® about your boat, your enclosure needs, and the right Custom Fishing Hardtop configuration for the layout you are working with.

Full Custom Hardtop
Atlantic Towers® ATL 6 self trimming aluminum extrusion combined with quality hand laid fiberglass allows the construction of Custom Hardtops that combine strength, durability, and attractive factory-like design in a structure that is light in weight and available at reasonable cost. Custom Hardtop prices start in the high $3000s.
Each Atlantic Towers® Custom Hardtop frame is made from high strength corrosion resistant aluminum alloys. The aluminum is brushed or spiral finished with a fine 320 abrasive, then chemically cleaned by bright dip and clear anodized for saltwater protection.
The perimeter hardtop frame is shaped using Atlantic Towers®' proprietary ATL-6 aluminum extrusion, which provides a self-trimming recess for the hand laid fiberglass top surface with no exposed fasteners.
Using Atlantic Towers®' proprietary database, and when needed measurements, drawings, and photographs of your boat or a sister ship, each Custom Hardtop is designed and fabricated strictly to order for the individual boat.
The leading edge of the Custom Hardtop is shaped to conform to the windshield on your boat for a factory-installed look and easier fit of a wrinkle-free enclosure. ATL 4 proprietary extrusions provide for concealed wiring and hidden accessory mounting bolts.





Supporting leg structure defines both the style and the structural support of a hardtop installation. Atlantic Towers® ATL 6 construction keeps hardtop weight to a minimum, which allows for more esthetically pleasing support structure.
Arch style legs are stylish, strong, and make for easy installation. They add a contemporary look to older boats and typically do not interfere with bridge access, existing handrails, guard rails, or accessories.
On flybridge boats, arch style legs can eliminate the need to remove or cut headliners to install backing plates. They also provide maximum flexibility in positioning of the hardtop when installed. The supporting pipe is typically 1 1/2" schedule 40 marine grade aluminum pipe, measuring 1.90" outside diameter with a heavy wall thickness.
Hardtops designed with arch style legs typically have four primary legs and mounting points, and may add two secondary sway braces for a total of six attachment points.
Traditional style legs typically combine a three-element rear supporting leg with a pair of forward primary supporting legs and two, four, or more secondary braces.
Atlantic Towers® Custom Hardtops with traditional style legs have at least six attachment points and frequently eight or more. This style remains popular with owners of earlier sport fishermen, convertibles, and other traditionally styled boats that historically used permanent tops or half towers.
Many other configurations are possible as well, including attaching Atlantic Towers® Custom Hardtops to existing arches, supporting cockpit sunshades, aft deck hardtops on motor yachts, and aft cabin boats.
Quote Guidance
Share your boat details with the sales team for a fast and accurate quotation, along with guidance on the right hardtop style, support structure, and mounting approach for your layout.
Shipping & Logistics
All Atlantic Towers® Custom Hardtops are completely engineered products. They leave the plant ready for installation without field welding or additional fabrication, which makes them practical to pack and ship anywhere in the world.
For considerable freight savings, supporting legs and structure may also be designed to demount using Atlantic Towers® custom hardware fittings, allowing larger tops to ship flat when appropriate.
