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Lagoon 40 S2 Survey in Preveza

Today's survey assignment involved conducting a Pre-Purchase Inspection and Valuation of a popular Lagoon multihull, constructed in 2013. Surprisingly, we discovered no issues with the bulkheads or any structural problems whatsoever. Clearly, this vessel has been well-maintained.



Lagoon catamarans are well-known in the sailing community for their comfort and space, offering a popular choice for both private use and charter operations. However, like any mass-produced boat, they have faced scrutiny over certain design and construction issues, notably concerning structural problems related to bulkheads and door frames. These issues are important to consider for potential buyers and owners in the context of ensuring the safety and longevity of their vessel.


Bulkheads in any sailing vessel play a critical role in the overall structural integrity. They are essentially the vertical walls within the hull that divide the boat into different sections. In addition to compartmentalization, bulkheads provide crucial support to the hull, reducing flex and helping to distribute stresses experienced while under sail or in rough conditions. In Lagoon catamarans, there have been reports and instances where the bulkheads have either been inadequately bonded to the hull and deck or have shown signs of detachment over time. This detachment can compromise the boat's structural integrity, leading to increased flexing of the hull, which can exacerbate the issue or lead to further damage.

Similarly, door frames within these catamarans can also present problems, particularly if the hull and deck begin to flex more than anticipated. This flexing can lead to misalignment of door frames, making doors difficult to close or, in some cases, causing them to become jammed. This is not just an inconvenience but also an indicator of potential structural movement or deformation.


The underlying causes of these issues can vary, including design considerations, construction methods, materials used, and the quality control processes in place during manufacture. For potential buyers or current owners, it's essential to conduct a thorough survey of the vessel, with a particular focus on these known areas of concern. A qualified marine surveyor, familiar with Lagoon catamarans and the specific standards outlined by The Boat Safety Scheme and the International Institute of Marine Surveying, should inspect the vessel. This inspection should aim to identify any signs of bulkhead or door frame issues, assess the severity, and recommend any necessary remedial actions.


Addressing these issues early can prevent more significant problems down the line, ensuring the safety of those on board and protecting the investment in the vessel. It's also worth noting that while these issues have been reported, many Lagoon catamarans sail without incident, testament to the model's design and the joy it brings to its owners. However, awareness and vigilance regarding these potential structural problems are key to a positive ownership experience.



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