SIA – Sociedade Industrial de Alumínios is a Portuguese company founded in 1990, specializing in the supply and installation of made-to-measure PVC and aluminium doors and windows. With more than 30 years of experience, SIA provides solutions for homes that aim to improve comfort, insulation, security and energy efficiency. Its services can include removing existing structures and installing modern systems, with work tailored to each customer’s needs. The company uses certified materials and modern installation techniques, and holds the CLASSE+ certification promoted by ADENE, recognizing the energy performance of its window installations.

SIA’s product range includes windows designed for thermal and acoustic insulation, durable doors, discreet insect screens, blinds for managing light and privacy, and shutters offering added thermal protection. Customers can choose options suited to their homes and façades. The company emphasizes professional installation, quality finishes and efficient service, and offers free, personalized quotations without obligation. Through its combination of products and installation services, SIA helps homeowners update their properties with practical, carefully fitted solutions.