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Passive Sills is the leading specialist provider of super lightweight, thermally efficient, insulated window sills, oversills, and thresholds. Compliant with all building regulations & energy efficiency standards, our products are designed and fabricated in our modern HQ and manufacturing facility in Youghal, Co. Cork.

Passive Sills products are recommended by leading architects, engineers & construction professionals. They are used by self-builders, construction developers, building firms, and local authorities for projects that range in size from small private residential projects to social public housing and large commercial projects.