PergoSTET 3m x 3m Aluminium & Steel Square Pergola in grey is a fully waterproof louvred roof featuring an award-winning design, exclusively from Harbour Lifestyle. The PergoSTET pergolas come with a built-in drainage system, a fully waterproof roof, and powder coating protection. They provide shade in the summer heat and can be switched to a fully waterproof roof at a moment's notice. All PergoSTET pergolas come with a 3 year warranty on the frame and 1 year warranty on the blinds and louvres.