Warranty terms for insulating glass units

  1. The insulating glass unit (IGU) manufacturer grants, with regard to the impermeability to moisture and dust of the interpane space of standard IGUs made by the manufacturer and used for building purposes, a warranty of 5 (five) years in the case of double glazing (2K) and triple glazing (3K) and a warranty of 3 (three) years in the case of movable units.
  2. The warranty period shall begin on the date of delivery of the product, except in the case of project-based delivery, where it shall begin on the date of acceptance of the completed work or site.
    The IGU manufacturer shall not be liable under these warranty terms, if the manufacturers deem it likely that the damage was caused as a result of an accident or similar incident or conditions the responsibility for which lies with another party.

For the warranty to be valid:

  • the mounting of the IGU must conform to applicable standard requirements;
  • the IGU must not be subject to extraordinary loads, for example, loads stemming from the load-bearing structure of the building;
  • the IGU’s joint seals and sash must be given regular maintenance in accordance with the manufacturer’s instructions;
  • the surfaces of the glass must not be painted over or covered with tapes, films, etc.
  1. If defects in workmanship or raw materials are discovered during first use or inspection upon delivery, the manufacturer must be notified immediately and the product must not be used without the manufacturer’s permission.
  2. The warranty period of an IGU provided to replace a defective IGU shall end at the end of the warranty period for the replaced IGU.
    Other elements, except IGUs covered by a warranty on impermeability to dust and moisture, shall be delivered to the company that purchased the IGU or to the installation site.

  3. This warranty shall not apply to IGUs with non-standard designs or in non-standard conditions, where:
  • another type of glass than float glass is used for the glazing;
  • the nominal width of the spacer bar is less than 6 mm or
  • greater than 15 mm, and the nominal thickness of the glass is less than 3 mm;
  • the nominal width of the spacer bar is less than 6 mm or greater than 20 mm, and the nominal thickness of the glass is greater than or equal to 4 mm;
  • the IGU is non-rectangular;
  • the IGU is installed in non-standard conditions (sauna, testing lab, cold store, factory, etc.), i.e. conditions caused by heating, humidity, air pressure, or chemicals that differ from normal conditions, or installation that does not conform to generally accepted guidelines. (SFS/EN standards and RT files)
  1. To ensure the long service life of the window, the glazing and the structures surrounding the IGU must be kept in good condition. In wooden windows, the treatment layer, the insulation material used for fixing the layers of glass, and the hinges require regular inspection and maintenance. If necessary, the insulation material and fixing must be repaired and the wooden surfaces must be re-treated.
  2. During follow-up inspection and maintenance of IGUs, attention must be paid, among other things, to the following:
  • the insulation material between the glazing and the framing must be restored, if necessary;
  • the fixing of the layers of glass must be repaired and the surfaces must be cleaned or re-treated, if necessary;
  • the surfaces of the framing must be re-treated regularly;
  • the sill room must have adequate ventilation.
  1. Warranty claims must be submitted to the IGU manufacturer before the end of the warranty period.
    Claims for repair or notices of defects submitted under the warranty terms must include the address of the property to be inspected, the contact details of the contact person, and, if possible:
  • the label of the IGU, indicating the year of manufacture and the manufacturer or brand;
  • the number of IGUs concerned;
  • the dimensions of the glass: width and height (incl. units);
  • the content of the claim for damages, supplemented by a simple drawing of the damage;
  • the number and date of the order placed with the original supplier;
  • the type marking of the IGU.