How to apply a mechanically fastened roof?
A mechanically fastened roof is generally quick and economical to install and because of its lightness in weight, will often enable savings to be made on the supporting structure. Additionally, as the membrane is exposed, any alterations are easily executed, as access is easy. The wide range of fasteners now available means that it is possible to mechanically fix an exposed Sika-Trocal membrane to virtually any type of deck.
The exposed, mechanically fastened membrane roof is the most widely specified option.
Sika-Trocal Type S membrane is suitable for mechanically fastened roofs in both new build and refurbishment applications, and generally provide the most rapid and economic system to install, utilising a Sika-Trocal Laminated Metal Disc and thermally broken fastener to secure both the membrane and the insulation rather than the separate fastening system used by many other single ply systems.
The Sika-Trocal Disc systems is generally accepted as the quickest, enable savings in time and cost. Furthermore there are no penetrations through the actual waterproofing.
Sika-Trocal Mechanically Fastened Roof Systems
A homogenous sheet, that is without any polyester fabric carriers, intended to be used solely as an exposed roof waterproofing membrane restrained against wind uplift forces by mechanical fasteners. Containing ultra violet stabilisers and fire retardants, Type S is highly resistant to ageing and industrial pollutants and will require no further surface treatments or coverings or any other maintenance throughout its service life. The absence of any carrier within the membrane means that the natural flexibility and extensibility of the product is left unrestricted so it has the ability to be fully utilised in absorbing all the movements that occur on any roof without failure.
Also, the elasticity of the membrane means that when dynamic wind loads are applied to the membrane the full dynamic force of that load is not directly transmitted to the fasteners, reducing the stress they would otherwise receive. The homogenous nature of the membrane also allows the use of ‘plastic memory’, stretching the membrane during manufacture so that when installed a limited amount of self tensioning will take place, removing the creases that are impossible to avoid during installation.