ALENOR "Warm Window" Technology: Sealed Installation Tapes

ALENOR "warm window" technology is a sealed-installation system that seals the mounting joint with inner and outer tapes to reduce heat loss.

The footage was recorded during a demonstration window installation at a construction trade show. The message is that, alongside a quality window, quality installation matters just as much.

What the video shows

• A demonstration window installation using the ALENOR warm-installation technology.


• Joint sealing with ALENOR tapes: an inner (vapour-barrier) tape and an outer tape with increased UV resistance.


• The tapes were tested at a construction institute in Leipzig.


• Filling of the mounting joint with elastic installation foam.


• Key point: heat loss caused by poor installation means unnecessary costs.

The principle of warm installation uses three layers in the joint: an inner vapour barrier, a middle thermal-insulation layer (foam) and an outer vapour-permeable layer that protects the foam from moisture and extends its service life.