The XDP Thermo set is used for quick and tight insulation of the window over the entire length of the frame. The XDP Thermo set consists of the vapour permeable collar (made of EUROTOP membrane and cut to match the window size, welded at the corners) with the installation tape and insulation band made of polyethylene foam. This material features a very low heat conduction coefficient of ʎ= 0.04 W/(m∙K). The adhesive tape is applied to the band in order to connect it with the roof window frame. The band comes with special notches for adjusting it to the roof window lining.