Under the roof tiles

Underlay is placed under the exterior roof and acts as a secondary line of defence against wind driven rain and snow, and reduces the wind loading on the roof tiles and slates and acts as a temporary roof covering during building construction, however, it is generally recommended in most product guarantees that exposure of the underlay should not exceed 1 month.
 Most modern membranes have many advantages over the traditional bitumen-based underlays:
  • Suitable for all concrete and clay roof tiles and slates.
  • Suitable for any roof shape and building type.
  • Suitable for cold roofs and ventilated or unventilated warm roofs.
  • Can be easily cut with a sharp knife.
  • Remain flexible at all normal working temperatures.
  • Can be used on the main roof areas, at the Eaves, Verges, Ridges, Valleys and Hips.


John Brash



Maintenance Plan

Missing tile? Cracked Mortar?

Download our Maintenance Plan here.
Share This...