The existing balconies were severely leaking into the residents’ properties below. While discussions for fitting a new membrane were underway, we took the opportunity to thermally upgrade the balconies to meet current regulations. We collaborated with an insulation company to design a custom “cut to fall” system, ensuring efficient water drainage to the outlet.
The works consisted of the following:
The original balcony structure comprised a concrete frame with screed to fall and asphalt as the primary waterproofing. Both the asphalt and screed were broken out, removed, and disposed of into skips.
Once down to the concrete frame, the surface was mechanically cleaned to remove all dirt and debris, creating a clean base. Prokol Pro Cap VCL was then adhered to this newly cleaned surface using Prokol Pro Cap adhesive.
A new bespoke “cut to fall” insulation system was fitted to the VCL, again using PU adhesive. This system was precisely cut to ensure all rainwater drains efficiently to the outlet.
Next, 9mm non-combustible cement board was chemically adhered to the foil-faced insulation using Prokol Monoselant mastic. Prokol Primer RW was then applied to the new cement board, including all upstands and parapet walls.
Finally, Prokol 136-T, a durable, hard-wearing pure polyurea, was applied to the entire balcony area, including all upstands and parapet walls, in one seamless coating. This coating spanned blocks of four balconies, terminating into a saw chase at either end of the block, creating a single waterproof layer. Cement tiles were then fitted over the polyurea with a wear course top coat, providing an anti-slip surface.
This application comes with a 50 year material and labour warranty.
