Cill Extensions take water away from structural openings and are designed with anti-capillary drips to allow water to drain away.

The extensions are glued and screwed to the window frame and are finished with silicone sealant at the joint for stability.

Various cill lengths can be offered on all products, the length being dependent on the construction detail. Cill extensions can also be used in certain build circumstances for doors.

The following lengths of cills are applicable to each range:
25mm/ 47mm/ 62mm / 87mm / 100mm / 114mm / 125mm / 140mm

114, 125 & 140mm cill extensions are supplied in hardwood as standard.

One piece subcills available on Traditional Casement models only