Window frame extension elements for plastic windows



  • Moisture-resistant
  • Thermal insulation values up to 0,2 W/m²K
  • Airborne sound insulation values up to 34 dB
  • Perfect surface thanks to 4 mm thick rigid PVC
  • Circumferential plywood edge band
  • Excellent screw retention qualities
  • Good mounting options
  • Retain their shape and dimensions





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 White (Veka, Kömmerling, Finstal, Internorm), film laminated
Cover panels Hard PVC panel, HPL decorative panel
Insulation Expanded polystyrene rigid foam with graphite additive, 25 kg/m³
Edge band Plywood IW67
Thickness 40 to 99 mm
Sizes White: 500 x 95 to 3588 x 1294 mm
Film: 500 x 95 to 2988 x 1294 mm


The Frinorm standard frame extension elements for plastic windows are especially suited for meeting high thermal insulation requirements. They are available in hard PVC in different shades of white (Veka, Kömmerling, Finstral or Internorm) or HPL with decorative foil (all colours). Expanded polystyrene rigid foam with graphite additive (EPS lambda), 25 kg/m3, is used as standard for thermal insulation. Other types of thermal insulation, such as PUR rigid foam or glass wool, are also available. The frame extension elements are fabricated with a circumferential plywood edge band or an edge band only on the long sides. Special edge bands can be inset according to your requirements. 

Test reports (PDF)