MemBreathe 135gsm Breathable Membrane

A triple layer, premium performance breather membrane, designed to help water vapor escape from inside the building without ventilation. Also acts as a barrier, repelling rain from entering.


  • In a fully supported or unsupported tiled, slated or metal roof system
  • Draped unsupported over rafters
  • Laid directly over insulation
  • Laid directly over sarking boards (Scottish Practice)

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Product Information

MemBreathe 135gsm Breathable Membrane

DescriptionWidth QuantityProduct Code
MemBreathe 135gsm Membrane1m1MEM13550
MemBreathe 135gsm Membrane1.5m1MEM13575

  • Available in 1m and 1.5m widths
  • Blue upper surface, branded with MemBreathe by Timloc logo
  • 3 layer waterproof membrane
  • Lightweight, flexible and easy to use
  • Excellent tensile and tear strength
  • UV stable (up to 3 months exposure)
  • Suitable for warm and cold roof applications
  • BBA independent certification
  • CE compliant to EN 13859-1
  • Tested in line with BS 5534:2014 Annex A (see Zone Suitability table on the MemBreathe 135gsm Datasheet)
  • Made from high tensile spun-bonded polyproylene layers around a microporous polypropylene film
  • Blue upper layer with branding
  • White lower layer
  1. Use a felt support tray or eaves protection strip to extend into the gutter. The membrane must not be dressed
    into an external gutter.
  2. Overlap with a first run of membrane, printed side up, starting from the eaves and working upwards.

MemBreathe by Timloc must be installed in accordance with the relevant sections of BS 5534:2018 and
Timloc Building Products’ installation guide.


To view the full installation guide for MemBreathe 135gsm click here or refer to the Technical Support section of


  • Order as each
  • State product code
  • Supplied as each in 1m or 1.5m roll widths

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