Monartile 1F Bituminous Roofing Underlay

MonarTile 1F is a traditional underslating felt that is ideal for large or small projects with main use is on boarded roofs.

MonarTile 1F comprises of a traditional hessian reinforcement and standard bitumen with a sanded finish. It’s manufactured to the traditionally formerly known BS747 standard for type 1F underslating felt for ventilated cold pitched roofs.

Features & Benefits

  • Proven performance
  • Unaffected by fungi, moss or lichen
  • Can be used on boarded roofs
  • Heavy duty yet flexible
  • Not affected by freeze-thaw cycles
  • Self sealing around nails

Product Availability

Product Code Description Roll Size Roll Weight
3007195 Monartile 1F Roofing Underlay 15m x 1m 22.5kg


Product Data and Performance

Product Data
Surface finish: Top side: Black/sanded
Underside: Black/sanded
Weight: 1500 g/m²


Wind Uplift Resistance

One of the functions of an roof tile underlay is to reduce the wind load, generated under wind gusts, that acts on the underside of the roof slates or tiles.
This issue is addressed in the BS5534 Code of Practice for Slating and Tiling. The selection of the correct underlay is dependent on the exposure of the roof to wind uplift, the type of roof construction specified and roof tile batten gauge. It may also be necessary to seal the lap of underlay.

Click here to check the suitability of this roofing underlay for your roofing project and to ascertain whether it complies with the wind uplift zonal performance requirements of BS5534.

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