KLS telescopic edge profiles are L-shaped and made of aluminium with perforations along the main fold for continuous drainage. The 2m long pieces have an insert of the same length, making it extensible and easily joinable, saving time and making cuts unnecessary. It provides vertical separation between gravel and growing media, it can also be used for edging green roofs until 90mm media depth. Typically they are self supporting and require no membrane penetrations.
KLS telescopic, also known as extending gravel boards, provide vertical separation between different aggregates with a maximum height difference of 9 cm. In addition they can also be used for edging extensive green or flat roofs, taking special conditions into consideration (eg. roof with no parapet wall).