The Roofshield roofing membrane has long been recognised as one of the highest performing roofing membrane solutions, providing a pitched roof underlay that is air and vapour permeable. The exceptional performance of Roofshield has been successfully incorporated in many of the most demanding locations worldwide. Its characteristics allow even very complex pitched roofs to breathe without the need for air gaps or secondary venting.
A unique performance characteristic of Roofshield is its patented SMS (Spunbond Meltblown Spunbond) structure, which allows high levels of airflow and the transport of moisture vapour, making the formation of condensation in the roof space virtually impossible. Numerous vapour permeable underlays use an airtight VP film layer to achieve their performance. However, the exceptionally high vapour permeability and air permeability of Roofshield means that it can perform in conditions in which air tight alternatives will not.
The roof structures of historic buildings can be complex, and the sensitive nature of these projects demands careful consideration of moisture management and condensation control. Many vapour permeable underlays use an airtight VP film layer to achieve their performance. However, Roofshield’s patented SMS (Spunbond Meltblown Spunbond) structure allows high levels of airflow, in addition to the transport of moisture vapour, making the formation of condensation in the roof space virtually impossible. It has an extremely high degree of vapour permeability and air permeability, so it will still perform in conditions in which airtight alternatives will not.
The exceptional air permeability performance of Roofshield means that the roof space will result in similar air changes to that of a roof using traditional eaves/ ridge ventilation. Therefore, another advantage of incorporating Roofshield into the roofing design is that it can lead to savings in labour and material costs due to removing the need for an additional vapour control layer in cold roof applications.
The inclusion of Roofshield provides significant protection for the roof and the house, preserving yet another essential part of the great Scottish heritage.