BalconySeal® is a revolutionary product which provides water drainage and waterproofing on most exterior POSIglaze, POSIone and POSI-Lite installations.

Most balconies and flat roofs are built with a slight pitch to encourage rainwater to drain towards the edge of the roof. In these cases, the balustrade installer needs to allow for drainage points under the channel, to avoid water pooling around the edge.

The BalconySeal® system works by subtly raising the channel a few millimeters above the substrate on drain blocks. Notches on the top side of the drain blocks locate into the rebates of the POSI channel, locking it into position before the system is bolt-fixed to the substrate through each block.

The gaps between the drain blocks are your water drainage channels. The drain blocks are subsequently filled with sealant to create a fully waterproofed balustrade installation. The system works best when a rubber waterproof membrane is applied to the surface.

To the left, you can see how the drain block looks under the POSIone, POSIglaze and POSI-Lite Base Fix channel. The system, as with all products, has limitations and the product works best when a rubber waterproof membrane is applied to the surface. Please contact our technical team regarding other roofing membrane types.