{"id":3577,"date":"2026-11-09T09:03:19","date_gmt":"2026-11-09T01:03:19","guid":{"rendered":"https:\/\/smartexscreen.com\/?post_type=news&p=3577"},"modified":"2026-11-07T09:44:42","modified_gmt":"2026-11-07T01:44:42","slug":"are-outdoor-blinds-waterproof-zip-blind-fabrics-explained","status":"publish","type":"news","link":"https:\/\/smartexscreen.com\/fr\/news\/are-outdoor-blinds-waterproof-zip-blind-fabrics-explained\/","title":{"rendered":"Les stores ext\u00e9rieurs sont-ils imperm\u00e9ables\u00a0? Les tissus des stores zipp\u00e9s expliqu\u00e9s"},"content":{"rendered":"

An store banne ext\u00e9rieure \u00e0 fermeture \u00e9clair<\/a> est g\u00e9n\u00e9ralement tout au plus r\u00e9sistante \u00e0 l\u2019eau, et non \u00e9tanche. Les tissus en maille et les toiles ajour\u00e9es laissent passer l\u2019eau par conception, et m\u00eame les tissus pleins peuvent laisser entrer l\u2019eau au niveau du coffre, de la barre inf\u00e9rieure et des coutures. Un rail \u00e0 fermeture \u00e9clair ferme les espaces lat\u00e9raux, ce qui r\u00e9duit la pluie sur les bords, mais ne transforme pas le syst\u00e8me en paroi \u00e9tanche.<\/p>\n

\u00c9tanche \u00e0 l\u2019eau ou r\u00e9sistante \u00e0 l\u2019eau : deux promesses diff\u00e9rentes<\/h2>\n

Imperm\u00e9able<\/strong> d\u00e9crit une barri\u00e8re qui emp\u00eache l\u2019eau liquide de passer dans les conditions indiqu\u00e9es. Pour une store banne ext\u00e9rieure, cette promesse devrait couvrir l\u2019ensemble du syst\u00e8me install\u00e9 : tissu, coutures, guides lat\u00e9raux, cassette sup\u00e9rieure, barre inf\u00e9rieure et espace entre la barre et le sol.
\nR\u00e9sistante \u00e0 l\u2019eau<\/strong> (parfois appel\u00e9 \u201c d\u00e9perlant \u201d) signifie que le mat\u00e9riau ralentit l\u2019eau ou la fait glisser \u00e0 sa surface. Une pluie l\u00e9g\u00e8re forme des gouttelettes qui ruissellent. Une pluie persistante, de l\u2019eau stagnante ou la pression du vent finit par traverser le mat\u00e9riau.
\nUne troisi\u00e8me cat\u00e9gorie est souvent absente de la discussion : les tissus perm\u00e9ables \u00e0 l\u2019eau. La plupart des tissus de stores zip de type screen appartiennent \u00e0 cette cat\u00e9gorie. Leur tissage ajour\u00e9 est con\u00e7u pour laisser passer l\u2019air et la lumi\u00e8re, et laisse donc aussi passer l\u2019eau. Ils peuvent n\u00e9anmoins r\u00e9duire la quantit\u00e9 de pluie qui atteint un espace de d\u00e9tente, car une partie des projections frappe les fils et ruisselle sur la face du tissu. C\u2019est un avantage utile. Il ne s\u2019agit pas d\u2019une r\u00e9sistance au sens textile du terme, et encore moins d\u2019une imperm\u00e9abilisation.<\/p>\n

\"Pergola<\/p>\n

Par o\u00f9 l\u2019eau passe-t-elle au-del\u00e0 d\u2019un store zip ?<\/h2>\n

Un store zip est un panneau en tissu dont les bords lat\u00e9raux coulissent \u00e0 l\u2019int\u00e9rieur de coulisses, emp\u00eachant ainsi le tissu de battre au vent ou de sortir du rail. Contrairement aux stores en PVC enroulables, qui pendent librement ou sont maintenus par des sangles et des crochets, il ferme les espaces lat\u00e9raux ouverts par lesquels la pluie pouss\u00e9e par le vent p\u00e9n\u00e8tre g\u00e9n\u00e9ralement en premier. De nombreuses pages de revendeurs s\u2019arr\u00eatent l\u00e0 dans leur explication.<\/p>\n

Le probl\u00e8me, c\u2019est que les c\u00f4t\u00e9s ne sont que l\u2019un des nombreux passages possibles :<\/p>\n

    \n
  1. Through the fabric itself. On any open-weave fabric, this is the main path.<\/li>\n
  2. Over the top. Water running down a wall or off a roof edge can track behind the cassette and down the inside face of the fabric unless the installation includes flashing or a roof overhang.<\/li>\n
  3. Under the bottom bar. Patios, decks and balcony tiles are rarely perfectly level. Any gap between bar and floor lets water and wind-blown spray through, and floor drainage can push water inward.<\/li>\n
  4. At fabric joins. Wide openings sometimes need fabric panels welded or stitched together. Stitch holes are a classic leak point on otherwise solid fabric.<\/li>\n
  5. Through the guide channels. Channels keep the edge captured; they are not gaskets. Water running down the outside of a channel can still reach the inside.<\/li>\n<\/ol>\n

    So the honest answer depends on the whole assembly, and the fabric decides most of it.<\/p>\n

    \"Toile<\/p>\n

    Fabric Type Decides Most of the Result<\/h2>\n

    The table below compares the common categories of fabric used in outdoor screens and blinds across the industry. It describes how each category behaves in rain in general terms. It is not a Smartex Screen specification, and which of these we can supply for a particular zip blind model must be confirmed for that model.<\/p>\n\n\n\n\n\n\n\n
    Fabric category<\/b><\/strong><\/td>\nStructure<\/b><\/strong><\/td>\nRain behavior<\/b><\/strong><\/td>\nAirflow and view<\/b><\/strong><\/td>\nTypical trade-off<\/b><\/strong><\/td>\n<\/tr>\n
    Open-weave coated polyester screen fabric<\/td>\nCoated yarns woven with visible openings<\/td>\nWater passes through the openings; some spray is deflected<\/td>\nAir moves through; outward view retained<\/td>\nComfortable in heat, but the space behind it will get wet in steady rain<\/td>\n<\/tr>\n
    Tighter-weave screen fabric<\/td>\nSame principle, smaller openings<\/td>\nLess spray gets through, but water still passes<\/td>\nLess airflow, darker view<\/td>\nA middle path that still cannot be called water-resistant without a test<\/td>\n<\/tr>\n
    Coated solid (non-mesh) fabric<\/td>\nBase cloth with a continuous coating<\/td>\nResists water through the cloth; seams and edges remain weak points<\/td>\nNo airflow; no view unless printed or sheer<\/td>\nTraps heat and humidity; carries higher wind load on the panel<\/td>\n<\/tr>\n
    Clear PVC sheet<\/td>\nContinuous transparent film<\/td>\nBlocks water through the material<\/td>\nNo airflow; full view<\/td>\nCondensation on the inside; can scratch and needs careful cleaning<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    Two practical points follow from this. A blind that blocks water also blocks air, so a fully closed patio can feel stuffy and damp in warm weather. And a solid panel catches more wind than a mesh panel, which matters for how the system is sized and when it should be retracted.<\/p>\n

    \"Toile<\/p>\n

    The “PVC Means Waterproof” Mistake<\/h2>\n

    This is the most common error we see in sourcing briefs and on marketplace listings. “PVC” appears in two very different products:<\/p>\n