Installed into the original timber framework of a sash window, Ventrollas award winning Perimeter Sealing System can upgrade the performance of a window to levels comparable with modern uPVC replacements, without altering the traditional appearance.

Ventrollas Perimeter Sealing System virtually eliminates draughts, rattles and dust ingress and creates improvements in noise attenuation of up to 50%.

Using a patented two-piece parting bead and a high performance weather seal, Ventrollas Perimeter Sealing System exceeds the most severe test for air-infiltration, BS6375 Part 1 1989 and negates the need for secondary glazing.