All insulated units (double paned glass) installed by Ace Glass have a 5 year manufacturer’s warranty on the seal of the glass. This means that if it loses its seal and fogs up within 5 years of the installation date, the glass unit will be covered under warranty. Please note that the labor to install the glass is not included under the manufacturer’s warranty. A discounted labor fee would still be applied for the removal and installation of the new glass unit.