This is a topic that always irks me to be honest, one that invokes heated debated and I'm right you're wrong answers.   In my honest opinion, SBD is no better than RC2 - they are both based on EN1627-30 which is the European standard. I have supplied European windows into the UK market for years and one supplier refuses to obtain additional certification (SBD/Pas24) for certifications they already have (EN1627-30). Gravenhill is an example and one that @Visti will confirm. Every single
    • Like
    1