• protects insulation material from dampness,
• guarantees airtightness,
• quick and easy to install,
• suitable for roof pitches 30° – 60°.

Airtight flashing should be secured internally to form a barrier against warm and humid air as any moisture on the surface of the insulation greatly reduces its thermo-insulating properties. For this reason, to avoid any air gaps, the roof window opening has an XDS airtight flashing. This ensures a flush fit between roof window and sheeting. The sheeting is pushed into a groove specially milled in the window's frame. The airtight flashing is made of polythene. The flashing should be chosen in accordance with the size of the window.