Polyester is a composite material, i.e. it is made up of several elements. The fabrics that form the weave are impregnated with resin, while the surface is composed of a gelcoat that provides protection from the outside environment<\/b>. Residues, acid and alcohol especially, are trapped inside the material during the catalysis process. The difference in concentration between these compounds and seawater causes the seawater to eventually soak through the gelcoat and impregnate the polyester. Gradually, the volume of liquid increases to the point of blistering the surface layer.<\/p>\n
[\/et_pb_text][et_pb_text admin_label=”Sommaire” _builder_version=”4.16″ _module_preset=”default” text_font=”Source Sans Pro|600|||||||” text_line_height=”2em” link_text_color=”#3e6a91″ background_color=”#fef9f5″ module_alignment=”center” custom_margin=”50px||0px||false|false” custom_padding=”30px|30px|30px|80px|false|false” global_colors_info=”{}”]<\/p>\n
Summary<\/h2>\n
1 – High and dry means no osmosis on my boat!<\/a> [\/et_pb_text][et_pb_text admin_label=”Paragraphe 1″ module_id=”titre1″ _builder_version=”4.16″ background_size=”initial” background_position=”top_left” background_repeat=”repeat” custom_margin=”50px||||false|false” global_colors_info=”{}”]<\/p>\n The gelcoat is therefore no longer perfectly watertight<\/b> and, if you\u2019re not careful, all the polyester ends up saturated with moisture to varying degrees. The best way to prevent osmosis from damaging your boat is to take it out of the water!<\/strong> Transportable boats and generally all those that winter ashore for more than 2 months a year don\u2019t suffer this phenomenon. When dry docking, you absolutely must rinse the hull with fresh water<\/b> to prevent any salt from retaining moisture.<\/p>\n [\/et_pb_text][et_pb_image src=”https:\/\/blog.bandofboats.com\/wp-content\/uploads\/2019\/10\/osmose-stade-avanc\u00e9.jpg” alt=”vision de pr\u00e8s de l’osmose d’un bateau” title_text=”osmose-stade-avanc\u00e9” _builder_version=”4.16″ _module_preset=”default” global_colors_info=”{}”][\/et_pb_image][et_pb_text admin_label=”Paragraphe 1″ module_id=”titre2″ _builder_version=”4.16″ background_size=”initial” background_position=”top_left” background_repeat=”repeat” custom_margin=”50px||||false|false” global_colors_info=”{}”]<\/p>\n For boats that remain afloat, shipyards recommend applying a preventive anti-osmosis treatment every 10 years<\/strong>. This involves stripping all the antifouling<\/b> layers, rinsing thoroughly with fresh water and carefully checking the hull\u2019s humidity level before you do anything else. You can measure this using a moisture tester<\/b>, a device used by marine surveyors, but also by lots of professionals.<\/p>\n This check is vital<\/b>. In fact, applying a waterproof treatment to waterlogged hulls will only trap moisture in the fabric. When buying second-hand, we strongly recommended that you are assisted by an independent expert, who can, among other things, ensure that the hull\u2019s humidity level is acceptable<\/b>.<\/p>\n [\/et_pb_text][et_pb_text admin_label=”Paragraphe 1″ module_id=”titre3″ _builder_version=”4.16″ background_size=”initial” background_position=”top_left” background_repeat=”repeat” custom_margin=”50px||||false|false” global_colors_info=”{}”]<\/p>\n Blisters are the most obvious sign that the disease is in an advanced stage! It\u2019s annoying, but not a case for panic: except in exceptional cases, it\u2019s a sign of ageing and not of decay\u2026 The disease progresses slowly and the prognosis is encouraging!<\/p>\n On the other hand, the treatment is lengthy<\/b>, tedious and quite expensive. Once out of the water, the entire hull must be stripped bare<\/b>. The porous gelcoat should removed, a painful and messy operation that should be entrusted to a competent and well-equipped professional. Once the polyester is bare and in open air, it should washed with fresh water to rinse off the acetic acid, the vinegar-scented liquid permeating it.<\/p>\n Then begins the lengthy drying phase<\/b>. This can last from 6 to 12 months, during which the surface<\/b> will have to be rinsed several times<\/b>. Once the tester displays acceptable moisture readings, the hull should be coated to restore the surface to a good condition and finally treated with a durable epoxy coating.<\/p>\n [\/et_pb_text][et_pb_image src=”https:\/\/blog.bandofboats.com\/wp-content\/uploads\/2019\/10\/osmose-coque-bateau.jpg” alt=”osmose sur la coque d’un bateau” title_text=”osmose-coque-bateau” _builder_version=”4.16″ _module_preset=”default” global_colors_info=”{}”][\/et_pb_image][et_pb_text admin_label=”Paragraphe 1″ module_id=”titre4″ _builder_version=”4.21.2″ background_size=”initial” background_position=”top_left” background_repeat=”repeat” custom_margin=”50px||||false|false” hover_enabled=”0″ global_colors_info=”{}” sticky_enabled=”0″]<\/p>\n Faced with the reality that your boat will experience osmosis, you may react in different ways.<\/strong> There are the constant worriers, who will invest in their own equipment and work out the hygrometric curve of their boats! Then there are those who think \u201cno blistering, no osmosis\u201d! \u00bb. Then there are those who enjoy pleasure of sailing to the fullest, while being aware that any abuse will end up damaging their boat<\/b>. They know that if they let the boat gradually soak up water, sooner or later they won\u2019t be sailing any more. They know their boat needs to stop drinking and go on a detox so that it can get back into shape.<\/p>\n Discover all the latest used boats for sale<\/a> available on Band of Boats!<\/p>\n The article is written by Olivier Chauvin.<\/i><\/p>\n [\/et_pb_text][\/et_pb_column][\/et_pb_row][\/et_pb_section]<\/p>\n","protected":false},"excerpt":{"rendered":" Boat osmosis is frightening, sometimes irrationally so! It worries both owners and future buyers of a polyester boat. Here\u2019s what you need to know! Polyester is a composite material, i.e. it is made up of several elements. The fabrics that form the weave are impregnated with resin, while the surface is composed of a gelcoat […]<\/p>\n","protected":false},"author":1,"featured_media":17475,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"on","_et_pb_old_content":"
2 – It\u2019s better to plan for osmosis appearing!<\/a>
3 – Make a prognosis to avoid boat osmosis<\/a>
4 – What precautions should you take to minimise boat osmosis<\/a><\/p>\n1. High and dry means no osmosis on my boat!<\/h2>\n
2. It\u2019s better to plan for osmosis appearing!<\/h2>\n
3. Make a prognosis to avoid boat osmosis<\/h2>\n
4. What precautions should you take to minimise boat osmosis?<\/h2>\n
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Au sec, pas d'osmose sur son bateau !<\/h2>\r\n\r\nLe gelcoat n'est donc pas parfaitement \u00e9tanche<\/b> et, si l'on n'y prend pas garde, tous les polyester finissent par s'impr\u00e9gner d'humidit\u00e9 \u00e0 des degr\u00e9s divers. La meilleure parade pour \u00e9viter que l'osmose n\u2019ab\u00eeme votre bateau, est de le sortir de l'eau !<\/strong> Les bateaux transportables et d'une mani\u00e8re g\u00e9n\u00e9rale, tous ceux qui hivernent \u00e0 terre plus de 2 mois par an sont \u00e9pargn\u00e9s par le ph\u00e9nom\u00e8ne. A la mise \u00e0 terre, il est essentiel de rincer la car\u00e8ne \u00e0 l'eau douce<\/b>, pour \u00e9viter que le sel n'entretienne l'humidit\u00e9.\r\n\r\n[caption id=\"attachment_12023\" align=\"alignnone\" width=\"1200\"]
![\"vision](\"https:\/\/blog.bandofboats.com\/wp-content\/uploads\/2019\/10\/osmose-stade-avanc\u00e9.jpg\")
OLYMPUS DIGITAL CAMERA[\/caption]\r\n\r\nMieux vaut anticiper l'apparition d'osmose !<\/h2>\r\n\r\nPour les bateaux qui restent \u00e0 flot, les chantiers recommandent l'application d'un traitement pr\u00e9ventif anti-osmose tous les 10 ans<\/strong>. Cela implique un d\u00e9capage de toutes les couches d'antifouling<\/b>, un rin\u00e7age soigneux \u00e0 l'eau douce et un contr\u00f4le rigoureux du degr\u00e9 d'humidit\u00e9 de la coque avant toute autre intervention. Cette mesure se fait \u00e0 l'aide d'un testeur d'humidit\u00e9<\/b>, appareil dont disposent les experts maritimes, mais aussi la plupart des professionnels.\r\n\r\nCe contr\u00f4le est indispensable<\/b>. En effet, appliquer un traitement \u00e9tanche sur des fonds gorg\u00e9s d'eau, ne ferait qu'emprisonner l'humidit\u00e9 dans les tissus. Il est d'ailleurs fortement recommand\u00e9 lors d'un achat d'occasion, de se faire assister par un expert ind\u00e9pendant, qui pourra, entre autres choses, s'assurer que le degr\u00e9 hygrom\u00e9trique de la coque est acceptable.<\/b>\r\n\r\n
Faire un pronostic pour \u00e9viter l'osmose de son bateau<\/h2>\r\n\r\nLes cloques sont le signe le plus \u00e9vident que la maladie est \u00e0 un stade avanc\u00e9 ! C'est ennuyeux, mais pour autant, pas d'affolement : sauf cas exceptionnel, il s'agit d'une marque de vieillissement et non de d\u00e9cr\u00e9pitude... La maladie \u00e9volue lentement et le pronostic vital est encourageant !\r\nPar contre, le traitement est long<\/b>, fastidieux et assez co\u00fbteux. Apr\u00e8s sortie de l'eau, l'ensemble de la car\u00e8ne est mise \u00e0 nu par pelage<\/b>. On la d\u00e9barrasse du gelcoat poreux, une op\u00e9ration p\u00e9nible et salissante, qu'il y a tout lieu de confier \u00e0 un professionnel comp\u00e9tent et bien outill\u00e9. Une fois le polyester \u00e0 l'air libre, il est lav\u00e9 \u00e0 l'eau douce pour rincer l'acide ac\u00e9tique, le liquide \u00e0 l'odeur de vinaigre qui l'impr\u00e8gne.\r\n\r\nCommence alors la longue phase de s\u00e9chage :<\/b> elle peut durer de 6 \u00e0 12 mois, au cours de laquelle il faudra rincer la surface \u00e0 plusieurs reprises<\/b>. Une fois que le testeur affiche des mesures d'humidit\u00e9 acceptables, la car\u00e8ne est enduite pour retrouver un bon \u00e9tat de surface et enfin trait\u00e9e avec un rev\u00eatement \u00e9poxy, durablement \u00e9tanche.\r\n\r\n[caption id=\"attachment_12022\" align=\"alignnone\" width=\"1200\"]
![\"osmose](\"https:\/\/blog.bandofboats.com\/wp-content\/uploads\/2019\/10\/osmose-coque-bateau.jpg\")
OLYMPUS DIGITAL CAMERA[\/caption]\r\n\r\nQuelles pr\u00e9cautions prendre face \u00e0 l'osmose de son bateau ?<\/h2>\r\n\r\n
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