Danelaw LR120TT – Vapour Permeable Tile and Slate Roofing Underlay

Danelaw LR120TT is a high quality low resistance roofing underlay for slate and tile roofs suitable for unsupported applications draped over rafters or fully supported over timber sarking or rigid insulation in compliance with the requirements of BS 5534 Slating and tiling for pitched roofs – Code of Practice and BS5250 Management of moisture in buildings – Code of practice.

This product has an integral tape to tape system for effectively sealing horizontal overlaps in moist and dusty conditions.

Features and Benefits of our Roofing Underlay

  • BBA Approved for use in warm and cold roofs (Certificate number 17/5426)
  • Integral tapes for effectively sealing overlaps
  • Durable and resistant to damage from foot traffic
  • UV resistant
  • Temporary weather protection prior to tile or slate fixing
  • Contributes to weathertightness of a completed roof
  • Airtight when sealed for improved energy efficiency

Product Codes and Sizes

Product code: DLR120TT 1.0 – 1.0m x 50m 
Product code: DLR120TT 1.5 – 1.5m x 50m

Hambleside Danelaw also produces LR120 which is the same weight but without the integral tape to tape system.  We also have other weights available which can be found at our stockists.

To find out more about the LR120TT roofing underlay, take a look at the available downloads below, or contact us.



Danelaw LR120TT Tile and Slate Roofing Underlay Datasheet
BBA 17 5426 Certificate Membrane – LR120 and LR150
Declaration of Performance (DOP) Danelaw LR120TT
DOP UKCA Danelaw LR120TT
Danelaw LR120TT 1 x 50m label and installation recommendations
Danelaw LR120TT 1.5 x 50m label and installation recommendations
Danelaw Ventilation for Tile and Slate Roofs Product Guide
  • Product code
  • Colour
  • Made from
  • Length
  • Width
    1.0m and 1.5

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