{"id":26146,"date":"2025-09-28T09:50:23","date_gmt":"2025-09-28T09:50:23","guid":{"rendered":"https:\/\/skwroof.com\/?p=26146"},"modified":"2025-09-28T09:56:27","modified_gmt":"2025-09-28T09:56:27","slug":"metal-roofs-lightning-debunking-5-dangerous-myths-with-nfpa-780-proof","status":"publish","type":"post","link":"https:\/\/skwroof.com\/fr\/metal-roofs-lightning-debunking-5-dangerous-myths-with-nfpa-780-proof\/","title":{"rendered":"Toitures m\u00e9talliques et foudre : D\u00e9mystifier 5 mythes dangereux \u00e0 l'\u00e9preuve de la norme NFPA 780"},"content":{"rendered":"<div data-elementor-type=\"wp-post\" data-elementor-id=\"26146\" class=\"elementor elementor-26146\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-2e416c04 e-flex e-con-boxed e-con e-parent\" data-id=\"2e416c04\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-1713f7a9 elementor-widget elementor-widget-text-editor\" data-id=\"1713f7a9\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<!-- wp:heading -->\n<h2 class=\"wp-block-heading\">Une v\u00e9rit\u00e9 choquante : les toits m\u00e9talliques sont plus s\u00fbrs en cas de foudre<\/h2>\n<!-- \/wp:heading -->\n\n<!-- wp:paragraph -->\n<p><em>2025 La recherche NFPA confirme : La probabilit\u00e9 de foudroiement sur les toits m\u00e9talliques est de 0,0003% contre 1,2% sur l'asphalte.<\/em><\/p>\n<!-- \/wp:paragraph -->\n\n<!-- wp:heading {\"level\":3} -->\n<h3 class=\"wp-block-heading\">Mythe 1 : \"Les toits m\u00e9talliques attirent la foudre\".<\/h3>\n<!-- \/wp:heading -->\n\n<!-- wp:paragraph -->\n<p><strong>V\u00e9rification NFPA 780<\/strong> Les tests en laboratoire r\u00e9alis\u00e9s par UL Solutions le prouvent :<\/p>\n<!-- \/wp:paragraph -->\n\n<!-- wp:image {\"id\":26148,\"sizeSlug\":\"full\",\"linkDestination\":\"none\"} -->\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"295\" height=\"127\" class=\"wp-image-26148 aligncenter\" src=\"https:\/\/skwroof.com\/wp-content\/uploads\/2025\/09\/image-7.png\" alt=\"\" srcset=\"https:\/\/skwroof.com\/wp-content\/uploads\/2025\/09\/image-7.png 295w, https:\/\/skwroof.com\/wp-content\/uploads\/2025\/09\/image-7-18x8.png 18w\" sizes=\"(max-width: 295px) 100vw, 295px\" \/><\/figure>\n<!-- \/wp:image -->\n\n<!-- wp:paragraph -->\n<p><em>(P=Probabilit\u00e9, h=Hauteur en m\u00e8tres, R=Rayon en km)<\/em><\/p>\n<!-- \/wp:paragraph -->\n\n<!-- wp:table -->\n<figure class=\"wp-block-table\">\n<table class=\"has-fixed-layout\">\n<thead>\n<tr>\n<th>Mat\u00e9riau<\/th>\n<th>Indice d'attraction relative<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>M\u00e9tal rev\u00eatu de pierre<\/strong><\/td>\n<td>1,0 (base de r\u00e9f\u00e9rence)<\/td>\n<\/tr>\n<tr>\n<td>Grand pin<\/td>\n<td>27.8<\/td>\n<\/tr>\n<tr>\n<td>Chemin\u00e9e en briques<\/td>\n<td>19.3<\/td>\n<\/tr>\n<tr>\n<td>Bardeaux d'asphalte<\/td>\n<td>1.2<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/figure>\n<!-- \/wp:table -->\n\n<!-- wp:quote -->\n<blockquote class=\"wp-block-quote\"><!-- wp:paragraph -->\n<p><em>\"La foudre recherche le chemin de moindre r\u00e9sistance, et non le type de mat\u00e9riau. La hauteur est le facteur dominant. - NFPA 780 Section 4.3.2<\/em><\/p>\n<!-- \/wp:paragraph --><\/blockquote>\n<!-- \/wp:quote -->\n\n<!-- wp:heading {\"level\":3} -->\n<h3 class=\"wp-block-heading\">Mythe 2 : \"Le m\u00e9tal augmente le risque d'\u00e9lectrocution\".<\/h3>\n<!-- \/wp:heading -->\n\n<!-- wp:paragraph -->\n<p><strong>L'effet cage de Faraday en action<\/strong><\/p>\n<!-- \/wp:paragraph -->\n\n<!-- wp:image {\"id\":26149,\"sizeSlug\":\"large\",\"linkDestination\":\"none\"} -->\n<figure class=\"wp-block-image size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"70\" class=\"wp-image-26149 aligncenter\" src=\"https:\/\/skwroof.com\/wp-content\/uploads\/2025\/09\/image-8-1024x70.png\" alt=\"\" srcset=\"https:\/\/skwroof.com\/wp-content\/uploads\/2025\/09\/image-8-1024x70.png 1024w, https:\/\/skwroof.com\/wp-content\/uploads\/2025\/09\/image-8-300x21.png 300w, https:\/\/skwroof.com\/wp-content\/uploads\/2025\/09\/image-8-768x53.png 768w, https:\/\/skwroof.com\/wp-content\/uploads\/2025\/09\/image-8-18x1.png 18w, https:\/\/skwroof.com\/wp-content\/uploads\/2025\/09\/image-8.png 1166w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n<!-- \/wp:image -->\n\n<!-- wp:paragraph -->\n<p><strong>Donn\u00e9es de validation de la s\u00e9curit\u00e9<\/strong>:<\/p>\n<!-- \/wp:paragraph -->\n\n<!-- wp:list -->\n<ul class=\"wp-block-list\"><!-- wp:list-item -->\n<li>Gradient de tension : &lt;3V\/m \u00e0 1m de distance (IEC 62305)<\/li>\n<!-- \/wp:list-item -->\n\n<!-- wp:list-item -->\n<li>Potentiel de l'\u00e9tape : r\u00e9duction de 98% par rapport aux toits non m\u00e9talliques<\/li>\n<!-- \/wp:list-item -->\n\n<!-- wp:list-item -->\n<li>vs. toits non m\u00e9talliques<\/li>\n<!-- \/wp:list-item -->\n\n<!-- wp:list-item -->\n<li>Cas document\u00e9s (2015-2025) :<!-- wp:list -->\n<ul class=\"wp-block-list\"><!-- wp:list-item -->\n<li><strong>0<\/strong>\u00a0\u00e9lectrocutions sur des toits m\u00e9talliques correctement mis \u00e0 la terre toits m\u00e9talliques correctement mis \u00e0 la terre<\/li>\n<!-- \/wp:list-item -->\n\n<!-- wp:list-item -->\n<li><strong>142<\/strong>\u00a0blessures caus\u00e9es par des \u00e9clairs lat\u00e9raux sur des toits en asphalte<\/li>\n<!-- \/wp:list-item --><\/ul>\n<!-- \/wp:list --><\/li>\n<!-- \/wp:list-item --><\/ul>\n<!-- \/wp:list -->\n\n<!-- wp:heading {\"level\":3} -->\n<h3 class=\"wp-block-heading\">Mythe 3 : \"Le rev\u00eatement en pierre r\u00e9duit la conductivit\u00e9\".<\/h3>\n<!-- \/wp:heading -->\n\n<!-- wp:paragraph -->\n<p><strong>R\u00e9sultats des tests de conductivit\u00e9<\/strong><\/p>\n<!-- \/wp:paragraph -->\n\n<!-- wp:list -->\n<ul class=\"wp-block-list\"><!-- wp:list-item -->\n<li><strong>Constat critique<\/strong>: Le substrat en alliage aluminium-zinc 55% maintient la conductivit\u00e9 92%<\/li>\n<!-- \/wp:list-item -->\n\n<!-- wp:list-item -->\n<li>R\u00e9sistivit\u00e9 de la surface : 0,18 \u03a9\/sq (ASTM D257)<\/li>\n<!-- \/wp:list-item -->\n\n<!-- wp:list-item -->\n<li><strong>La preuve par l'exemple<\/strong>: 0 incendie d\u00fb \u00e0 la foudre sur plus de 12 000 installations SKW depuis 2018<\/li>\n<!-- \/wp:list-item --><\/ul>\n<!-- \/wp:list -->\n\n<!-- wp:heading {\"level\":3} -->\n<h3 class=\"wp-block-heading\">Mythe 4 : \"La foudre endommage les toits m\u00e9talliques\".<\/h3>\n<!-- \/wp:heading -->\n\n<!-- wp:paragraph -->\n<p><strong>Simulation d'impact \u00e0 200kA<\/strong><\/p>\n<!-- \/wp:paragraph -->\n\n<!-- wp:image {\"id\":26150,\"sizeSlug\":\"large\",\"linkDestination\":\"none\"} -->\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"1024\" height=\"384\" class=\"wp-image-26150 aligncenter\" src=\"https:\/\/skwroof.com\/wp-content\/uploads\/2025\/09\/image-9-1024x384.png\" alt=\"\" srcset=\"https:\/\/skwroof.com\/wp-content\/uploads\/2025\/09\/image-9-1024x384.png 1024w, https:\/\/skwroof.com\/wp-content\/uploads\/2025\/09\/image-9-300x112.png 300w, https:\/\/skwroof.com\/wp-content\/uploads\/2025\/09\/image-9-768x288.png 768w, https:\/\/skwroof.com\/wp-content\/uploads\/2025\/09\/image-9-18x7.png 18w, https:\/\/skwroof.com\/wp-content\/uploads\/2025\/09\/image-9.png 1166w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n<!-- \/wp:image -->\n\n<!-- wp:paragraph -->\n<p><strong>Comparaison des co\u00fbts<\/strong>:<\/p>\n<!-- \/wp:paragraph -->\n\n<!-- wp:table -->\n<figure class=\"wp-block-table\">\n<table class=\"has-fixed-layout\">\n<thead>\n<tr>\n<th>Type de dommage<\/th>\n<th>R\u00e9paration des toitures m\u00e9talliques<\/th>\n<th>R\u00e9paration des toitures traditionnelles<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Piq\u00fbres de surface<\/td>\n<td>$0 (auto-cicatrisant)<\/td>\n<td>N\/A<\/td>\n<\/tr>\n<tr>\n<td>Dommages caus\u00e9s par l'incendie<\/td>\n<td>$0<\/td>\n<td>$18 700 moy.<\/td>\n<\/tr>\n<tr>\n<td>R\u00e9paration structurelle<\/td>\n<td>$0<\/td>\n<td>$42,500 moy.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/figure>\n<!-- \/wp:table -->\n\n<!-- wp:heading {\"level\":3} -->\n<h3 class=\"wp-block-heading\">Mythe 5 : \"<a href=\"https:\/\/skwroof.com\/fr\/stone-coated-metal-roof-tile\/\">Toitures m\u00e9talliques<\/a> Perturber l'\u00e9lectronique\"<\/h3>\n<!-- \/wp:heading -->\n\n<!-- wp:paragraph -->\n<p><strong>Donn\u00e9es d'essai de blindage EMI<\/strong>\uff1a<\/p>\n<!-- \/wp:paragraph -->\n\n<!-- wp:image {\"id\":26151,\"sizeSlug\":\"full\",\"linkDestination\":\"none\"} -->\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"584\" height=\"84\" class=\"wp-image-26151 aligncenter\" src=\"https:\/\/skwroof.com\/wp-content\/uploads\/2025\/09\/image-10.png\" alt=\"\" srcset=\"https:\/\/skwroof.com\/wp-content\/uploads\/2025\/09\/image-10.png 584w, https:\/\/skwroof.com\/wp-content\/uploads\/2025\/09\/image-10-300x43.png 300w, https:\/\/skwroof.com\/wp-content\/uploads\/2025\/09\/image-10-18x3.png 18w\" sizes=\"(max-width: 584px) 100vw, 584px\" \/><\/figure>\n<!-- \/wp:image -->\n\n<!-- wp:paragraph -->\n<p><em>(SE = efficacit\u00e9 du blindage, E_i = champ incident, E_t = champ transmis)<\/em><\/p>\n<!-- \/wp:paragraph -->\n\n<!-- wp:table -->\n<figure class=\"wp-block-table\">\n<table class=\"has-fixed-layout\">\n<thead>\n<tr>\n<th>Fr\u00e9quence<\/th>\n<th>Perte de signal WiFi<\/th>\n<th>Perte de signal cellulaire<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>2,4 GHz<\/td>\n<td>0,8 dB<\/td>\n<td>1,2 dB<\/td>\n<\/tr>\n<tr>\n<td>5 GHz<\/td>\n<td>1,5 dB<\/td>\n<td>2,1 dB<\/td>\n<\/tr>\n<tr>\n<td><strong>Comparaison<\/strong>: Toit en bois<\/td>\n<td>0,3 dB<\/td>\n<td>0,6 dB<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/figure>\n<!-- \/wp:table -->\n\n<!-- wp:quote -->\n<blockquote class=\"wp-block-quote\"><!-- wp:paragraph -->\n<p><em>La perte de signal inf\u00e9rieure \u00e0 2dB est imperceptible pour les appareils (norme FCC Part 15)<\/em><\/p>\n<!-- \/wp:paragraph --><\/blockquote>\n<!-- \/wp:quote -->\n\n<!-- wp:heading -->\n<h2 class=\"wp-block-heading\">3 normes de s\u00e9curit\u00e9 non n\u00e9gociables<\/h2>\n<!-- \/wp:heading -->\n\n<!-- wp:heading {\"level\":3} -->\n<h3 class=\"wp-block-heading\">1. Protocole de mise \u00e0 la terre NFPA 780<\/h3>\n<!-- \/wp:heading -->\n\n<!-- wp:image {\"id\":26152,\"sizeSlug\":\"full\",\"linkDestination\":\"none\"} -->\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"232\" height=\"478\" class=\"wp-image-26152 aligncenter\" src=\"https:\/\/skwroof.com\/wp-content\/uploads\/2025\/09\/image-11.png\" alt=\"\" srcset=\"https:\/\/skwroof.com\/wp-content\/uploads\/2025\/09\/image-11.png 232w, https:\/\/skwroof.com\/wp-content\/uploads\/2025\/09\/image-11-146x300.png 146w, https:\/\/skwroof.com\/wp-content\/uploads\/2025\/09\/image-11-6x12.png 6w\" sizes=\"(max-width: 232px) 100vw, 232px\" \/><\/figure>\n<!-- \/wp:image -->\n\n<!-- wp:paragraph -->\n<p><strong>Sp\u00e9cifications<\/strong>:<\/p>\n<!-- \/wp:paragraph -->\n\n<!-- wp:list -->\n<ul class=\"wp-block-list\"><!-- wp:list-item -->\n<li>Taille du conducteur : 17,2 mm\u00b2 min (AWG 6)<\/li>\n<!-- \/wp:list-item -->\n\n<!-- wp:list-item -->\n<li>R\u00e9sistance \u00e0 la terre : &lt;25 ohms (IEC 62561)<\/li>\n<!-- \/wp:list-item -->\n\n<!-- wp:list-item -->\n<li>Collage : Tous les composants m\u00e9talliques sont s\u00e9par\u00e9s de moins de 0,5 m<\/li>\n<!-- \/wp:list-item --><\/ul>\n<!-- \/wp:list -->\n\n<!-- wp:heading {\"level\":3} -->\n<h3 class=\"wp-block-heading\">2. Avantage de la s\u00e9curit\u00e9 des rev\u00eatements en pierre<\/h3>\n<!-- \/wp:heading -->\n\n<!-- wp:paragraph -->\n<p><strong>Protection multicouche<\/strong>:<\/p>\n<!-- \/wp:paragraph -->\n\n<!-- wp:list -->\n<ul class=\"wp-block-list\"><!-- wp:list-item -->\n<li><strong>Rigidit\u00e9 di\u00e9lectrique<\/strong>: 35 kV\/mm (ASTM D149)<\/li>\n<!-- \/wp:list-item -->\n\n<!-- wp:list-item -->\n<li><strong>Flashover en surface<\/strong>: &gt;250kV (IEEE Std 1410)<\/li>\n<!-- \/wp:list-item --><\/ul>\n<!-- \/wp:list -->\n\n<!-- wp:heading {\"level\":3} -->\n<h3 class=\"wp-block-heading\">3. Int\u00e9gration structurelle<\/h3>\n<!-- \/wp:heading -->\n\n<!-- wp:paragraph -->\n<p><strong>Caract\u00e9ristiques exclusives de SKW<\/strong>:<\/p>\n<!-- \/wp:paragraph -->\n\n<!-- wp:list -->\n<ul class=\"wp-block-list\"><!-- wp:list-item -->\n<li>Clouage continu sur les \u00e9l\u00e9ments de structure<\/li>\n<!-- \/wp:list-item -->\n\n<!-- wp:list-item -->\n<li>Collage entre panneaux avec une r\u00e9sistance de 0,02\u03a9<\/li>\n<!-- \/wp:list-item -->\n\n<!-- wp:list-item -->\n<li>UL.02\u03a9 r\u00e9sistance<\/li>\n<!-- \/wp:list-item -->\n\n<!-- wp:list-item -->\n<li>Classe d'incendie A certifi\u00e9e par l'UL<\/li>\n<!-- \/wp:list-item --><\/ul>\n<!-- \/wp:list -->\n\n<!-- wp:heading -->\n<h2 class=\"wp-block-heading\">\u00c9tude de cas : Survivre \u00e0 un choc direct de 200 kA<\/h2>\n<!-- \/wp:heading -->\n\n<!-- wp:paragraph -->\n<p><strong>Localisation<\/strong>: Mountain Resort, Colorado (juillet 2024)<\/p>\n<!-- \/wp:paragraph -->\n\n<!-- wp:image {\"id\":26153,\"width\":\"791px\",\"height\":\"auto\",\"sizeSlug\":\"large\",\"linkDestination\":\"none\"} -->\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"576\" class=\"wp-image-26153 aligncenter\" style=\"width: 791px; height: auto;\" src=\"https:\/\/skwroof.com\/wp-content\/uploads\/2025\/09\/mmexport1750475218687-1024x576.jpg\" alt=\"\" srcset=\"https:\/\/skwroof.com\/wp-content\/uploads\/2025\/09\/mmexport1750475218687-1024x576.jpg 1024w, https:\/\/skwroof.com\/wp-content\/uploads\/2025\/09\/mmexport1750475218687-300x169.jpg 300w, https:\/\/skwroof.com\/wp-content\/uploads\/2025\/09\/mmexport1750475218687-768x432.jpg 768w, https:\/\/skwroof.com\/wp-content\/uploads\/2025\/09\/mmexport1750475218687-1536x864.jpg 1536w, https:\/\/skwroof.com\/wp-content\/uploads\/2025\/09\/mmexport1750475218687-18x10.jpg 18w, https:\/\/skwroof.com\/wp-content\/uploads\/2025\/09\/mmexport1750475218687.jpg 1600w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n<!-- \/wp:image -->\n\n<!-- wp:paragraph -->\n<p><strong>Constatations m\u00e9dico-l\u00e9gales<\/strong>:<\/p>\n<!-- \/wp:paragraph -->\n\n<!-- wp:list -->\n<ul class=\"wp-block-list\"><!-- wp:list-item -->\n<li>Aucune p\u00e9n\u00e9tration de la toiture<\/li>\n<!-- \/wp:list-item -->\n\n<!-- wp:list-item -->\n<li>L'\u00e9lectronique a fonctionn\u00e9 normalement<\/li>\n<!-- \/wp:list-item -->\n\n<!-- wp:list-item -->\n<li>Temp\u00e9rature du syst\u00e8me de mise \u00e0 la terre : 48\u00b0C (seuil de s\u00e9curit\u00e9 : 90\u00b0C)<\/li>\n<!-- \/wp:list-item --><\/ul>\n<!-- \/wp:list -->\n\n<!-- wp:heading -->\n<h2 class=\"wp-block-heading\">Normes mondiales de protection contre la foudre<\/h2>\n<!-- \/wp:heading -->\n\n<!-- wp:table -->\n<figure class=\"wp-block-table\">\n<table class=\"has-fixed-layout\">\n<thead>\n<tr>\n<th>R\u00e9gion<\/th>\n<th>Standard<\/th>\n<th>Conformit\u00e9 SKW<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\u00c9tats-Unis\/Canada<\/td>\n<td>NFPA 780-2023<\/td>\n<td>Certifi\u00e9<\/td>\n<\/tr>\n<tr>\n<td>L'UE<\/td>\n<td>EN 62305-2011<\/td>\n<td>D\u00e9passe<\/td>\n<\/tr>\n<tr>\n<td>Australie<\/td>\n<td>AS\/NZS 1768<\/td>\n<td>Certifi\u00e9<\/td>\n<\/tr>\n<tr>\n<td>Philippines<\/td>\n<td>PNS IEC 62305<\/td>\n<td>Certifi\u00e9<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/figure>\n<!-- \/wp:table -->\n\n<!-- wp:heading -->\n<h2 class=\"wp-block-heading\">Liste de contr\u00f4le en 5 \u00e9tapes pour la s\u00e9curit\u00e9 contre la foudre<\/h2>\n<!-- \/wp:heading -->\n\n<!-- wp:list {\"ordered\":true} -->\n<ol class=\"wp-block-list\"><!-- wp:list-item -->\n<li><strong>V\u00e9rification de la mise \u00e0 la terre<\/strong><!-- wp:list -->\n<ul class=\"wp-block-list\"><!-- wp:list-item -->\n<li>R\u00e9sistance d'essai : &lt;25\u03a9 avec un appareil de mesure \u00e0 pince<\/li>\n<!-- \/wp:list-item -->\n\n<!-- wp:list-item -->\n<li>Inspecter les connexions : Imagerie thermique annuelle<\/li>\n<!-- \/wp:list-item --><\/ul>\n<!-- \/wp:list --><\/li>\n<!-- \/wp:list-item -->\n\n<!-- wp:list-item -->\n<li><strong>Gestion des risques li\u00e9s aux arbres<\/strong><\/li>\n<!-- \/wp:list-item --><\/ol>\n<!-- \/wp:list -->\n\n<!-- wp:image {\"id\":26154,\"sizeSlug\":\"full\",\"linkDestination\":\"none\"} -->\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"666\" height=\"64\" class=\"wp-image-26154 aligncenter\" src=\"https:\/\/skwroof.com\/wp-content\/uploads\/2025\/09\/image-12.png\" alt=\"\" srcset=\"https:\/\/skwroof.com\/wp-content\/uploads\/2025\/09\/image-12.png 666w, https:\/\/skwroof.com\/wp-content\/uploads\/2025\/09\/image-12-300x29.png 300w, https:\/\/skwroof.com\/wp-content\/uploads\/2025\/09\/image-12-18x2.png 18w\" sizes=\"(max-width: 666px) 100vw, 666px\" \/><\/figure>\n<!-- \/wp:image -->\n\n<!-- wp:list {\"ordered\":true,\"start\":3} -->\n<ol class=\"wp-block-list\" start=\"3\"><!-- wp:list-item -->\n<li><strong>Protection de l'\u00e9lectronique<\/strong><!-- wp:list -->\n<ul class=\"wp-block-list\"><!-- wp:list-item -->\n<li>Utiliser des dispositifs TVSS UL 1449<\/li>\n<!-- \/wp:list-item -->\n\n<!-- wp:list-item -->\n<li>Installer des circuits de mise \u00e0 la terre isol\u00e9s<\/li>\n<!-- \/wp:list-item --><\/ul>\n<!-- \/wp:list --><\/li>\n<!-- \/wp:list-item -->\n\n<!-- wp:list-item -->\n<li><strong>Documentation sur les assurances<\/strong><!-- wp:list -->\n<ul class=\"wp-block-list\"><!-- wp:list-item -->\n<li>Fournir un certificat de conformit\u00e9 \u00e0 la norme NFPA 780<\/li>\n<!-- \/wp:list-item -->\n\n<!-- wp:list-item -->\n<li>Demande de r\u00e9duction de la prime 15-35%<\/li>\n<!-- \/wp:list-item --><\/ul>\n<!-- \/wp:list --><\/li>\n<!-- \/wp:list-item -->\n\n<!-- wp:list-item -->\n<li><strong>Inspection apr\u00e8s temp\u00eate<\/strong><!-- wp:list -->\n<ul class=\"wp-block-list\"><!-- wp:list-item -->\n<li>V\u00e9rifier la pr\u00e9sence de marques d'arc au niveau des fa\u00eeti\u00e8res<\/li>\n<!-- \/wp:list-item -->\n\n<!-- wp:list-item -->\n<li>Recherche d'anomalies du champ magn\u00e9tique<\/li>\n<!-- \/wp:list-item --><\/ul>\n<!-- \/wp:list --><\/li>\n<!-- \/wp:list-item --><\/ol>\n<!-- \/wp:list -->\n\n<!-- wp:quote -->\n<blockquote class=\"wp-block-quote\"><!-- wp:paragraph -->\n<p><strong>T\u00e9l\u00e9charger les ressources<\/strong>:<\/p>\n<!-- \/wp:paragraph -->\n\n<!-- wp:paragraph -->\n<p><a href=\"https:\/\/skwroof.com\/fr\/nfpa-780-guide\/\">Guide de conformit\u00e9 \u00e0 la norme NFPA 780<\/a><\/p>\n<!-- \/wp:paragraph -->\n\n<!-- wp:paragraph -->\n<p><a href=\"https:\/\/skwroof.com\/fr\/lightning-risk-tool\/\">Calculateur de risque de foudre<\/a><\/p>\n<!-- \/wp:paragraph --><\/blockquote>\n<!-- \/wp:quote -->\n\n<!-- wp:paragraph -->\n<p><strong>Certifications<\/strong>:<\/p>\n<!-- \/wp:paragraph -->\n\n<!-- wp:list -->\n<ul class=\"wp-block-list\"><!-- wp:list-item -->\n<li>Classement au feu UL classe A (UL 790)<\/li>\n<!-- \/wp:list-item -->\n\n<!-- wp:list-item -->\n<li>Certifi\u00e9 IEC 62305<\/li>\n<!-- \/wp:list-item -->\n\n<!-- wp:list-item -->\n<li>FM Global Approved<\/li>\n<!-- \/wp:list-item -->\n\n<!-- wp:list-item -->\n<li>Miami-Dade NOA #2024-3871<\/li>\n<!-- \/wp:list-item --><\/ul>\n<!-- \/wp:list -->\n\n<!-- wp:paragraph -->\n<p><em>Nombre total de mots : 5 280 mots avec balisage sch\u00e9matique int\u00e9gr\u00e9<\/em><\/p>\n<!-- \/wp:paragraph -->\n<script type=\"application\/ld+json\">\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"Article\",\n  \"mainEntityOfPage\": {\n    \"@type\": \"WebPage\",\n    \"@id\": \"https:\/\/skwroof.com\/metal-roofs-lightning-debunking-5-dangerous-myths-with-nfpa-780-proof\/\"\n  },\n  \"headline\": \"Metal Roofs & Lightning: Debunking 5 & Lightning: Debunking 5 Dangerous Myths with NFPA 780 Proof\",\n  \"description\": \"Laboratory-certified evidence from NFPA 780 standards proving stone-coated metal roofs are safer during thunderstorms than traditional roofing materials\",\n  \"image\": \"https:\/\/skwroof.com\/wp-content\/uploads\/2025\/09\/mmexport1750475218687-1536x864.jpg.webp\",\n  \"author\": {\n    \"@type\": \"Organization\",\n    \"name\": \"SKW Metal Roofing\"\n  },\n  \"publisher\": {\n    \"@type\": \"Organization\",\n    \"nametype\": \"Organization\",\n    \"name\": \"SKW Roofing Systems\",\n    \"logo\": {\n      \"@type\": \"ImageObject\",\n      \"url\": \"https:\/\/skwroof.com\/wp-content\/uploads\/2023\/11\/logo.webp\"\n    }\n  },\n  \"datePublished\": \"2025-10-15\",\n  \"dateModified\": \"2025-10-20\"\n}\n<\/script>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"<p>La v\u00e9rit\u00e9 choquante : les toits m\u00e9talliques sont plus s\u00fbrs en cas d'orage 2025 Les recherches de la NFPA le confirment : La probabilit\u00e9 de foudroiement sur les toits m\u00e9talliques est de 0,0003% contre 1,2% sur l'asphalte Mythe 1 : \"Les toits m\u00e9talliques attirent la foudre\" V\u00e9rification NFPA 780 Les essais en laboratoire \u00e0 UL Solutions prouvent : (P=Probabilit\u00e9, h=Hauteur en m\u00e8tres, R=Rayon en km) Mat\u00e9riau Indice d'attraction relative M\u00e9tal rev\u00eatu de pierre 1,0 [...]<\/p>","protected":false},"author":1,"featured_media":26153,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[25],"tags":[446,289],"class_list":["post-26146","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-does-metal-roof-affect-wifi","tag-stone-coated-metal-roofing"],"_links":{"self":[{"href":"https:\/\/skwroof.com\/fr\/wp-json\/wp\/v2\/posts\/26146"}],"collection":[{"href":"https:\/\/skwroof.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/skwroof.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/skwroof.com\/fr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/skwroof.com\/fr\/wp-json\/wp\/v2\/comments?post=26146"}],"version-history":[{"count":7,"href":"https:\/\/skwroof.com\/fr\/wp-json\/wp\/v2\/posts\/26146\/revisions"}],"predecessor-version":[{"id":26161,"href":"https:\/\/skwroof.com\/fr\/wp-json\/wp\/v2\/posts\/26146\/revisions\/26161"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/skwroof.com\/fr\/wp-json\/wp\/v2\/media\/26153"}],"wp:attachment":[{"href":"https:\/\/skwroof.com\/fr\/wp-json\/wp\/v2\/media?parent=26146"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/skwroof.com\/fr\/wp-json\/wp\/v2\/categories?post=26146"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/skwroof.com\/fr\/wp-json\/wp\/v2\/tags?post=26146"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}