Window frame extension elements for wooden and wood-metal windows
moisture-resistant and with sound insulation



  • Moisture-resistant
  • Thermal insulation values up to 0,3 W/m²K
  • Airborne sound insulation values up to 40 dB
  • All types of real wood veneers available
  • Circumferential wooden edge band
  • Good mounting options
  • Retain their shape and dimensions
  • Problem-free surface finishing





The following services are included in the square metre price:

  • Preassembled, custom-made according to the desired length, width and profile thickness
  • Four-sided counter profile work, tailored to your frame or threshold profile
  • Circumferential solid edge band
  • Delivered picked to order
  • No waste, machine, labour and storage costs


The following additional services can also be commissioned:

  • Edge banding possible
  • Additional wood inserts freely selectable
  • Special processing such as cut-outs, round and segment arches, ventilation slots or surface grooves are also possible
  • Special designs possible



Product description:


Surfaces Untreated, priming film, real wood veneer
Cover panels Plywood panel AW100
Insulation Glass wool, 20 kg/m³
Sound insulation Heavy bitumen foil
Edge band Spruce pine
Thickness 40 to 99 mm
Sizes 500 x 95 to 3588 x 1294 mm


The moisture-resistant Frinorm sound insulation frame extension elements are the right choice, especially when high levels of moisture resistance and thermal insulation are required. They are available with untreated plywood panel AW100, plywood panel AW100 with primer foil or plywood panel AW100 with real wood veneer in all types of wood. Depending on the sound insulation requirements, the frame extension elements are fabricated with one or two heavy bitumen foils. Glass wool, 20 kg/m³, is used for thermal insulation. The window frame extension elements are fabricated with a circumferential spruce pine edge band. Special edge bands can be inset according to your requirements.