Les murs ou toits végétalisés sont de plus en plus fréquents dans les nouvelles constructions. Quels sont les rôles concrets de ces végétaux ancrés dans l’architecture du bâtiment, quelles contraintes, quelles espèces, quels avantages, quelles problématiques pour les eaux pluviales ? Les avantages environnementaux d’un point de vue biodiversité Les toits conventionnels ne sont pas des lieux d’accueil favorables à la biodiversité, c’est le moins qu’on puisse dire… Il n’y a bien que la mousse qui parvienne à s’y ancrer malgré l’aridité du milieu. Les toits végétalisés tels qu’on les connaît maintenant sont apparus en Allemagne dans les années 70 (au moment où je suis née, au siècle dernier)
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