Sika is a market leading manufacturer of a wide range of single layer roof waterproofing membranes and associated ancillary products. Sika-Trocal® products are light in weight, quick and easy to install and are suitable for both refurbishment and new build projects. They can be laid onto flat, pitched or even vertical surfaces along with convex, concave & other non standard roof profiles. The first Sika-Trocal® flexible roofing sheets were produced in Germany in 1962 and since then they have gone on to be used in many different environments around the world. The first major project in the UK was commissioned in 1972 and we have been at the forefront of developing the UK market since then. This manual is intended to provide design & technical information on our products & systems.