Roofing breather membrane information
Breather Membrane Info:
High Performance Breather
"Highly breathable waterproof
membrane, constructed from high tensile spun-bonded polypropylene
layers, around a microporous polypropylene film. The outer layer
forms the functional waterproof surface, the middle layer is the
breathable waterproof membrane, and the inner layer protects the
membrane from abrasion and damage, also giving additional strength.
This enables the fabric to allow moisture vapour to pass through,
whilst remaining fully waterproof. Rubershield-PRO has a dark green
upper surface, printed with the trade name and head lap
Rubershield-PRO is a
second-generation breather membrane, conforming to the highest
performance and professional standards. Designed for use as a fully
supported or unsupported breathable underlay for tiled, slated or
metal roofing systems, Rubershield-PRO is a triple layer engineered
fabric, ensuring full moisture vapour permeability, whilst
maintaining the highest levels of water resistance.
The high vapour permeability and
waterproof nature of the membrane, combined with excellent
tensile/tear strength, make Rubershield-PRO the professional's
choice as the ultimate breather membrane. It is equally suitable
whether draped unsupported over rafters or laid directly over
insulation. Rubershield-PRO allows the escape of water vapour from
within the roof structure whilst protecting against wind driven
rain, snow and dust which may penetrate the main roof
waterproofing, providing a permanent quality breather underlay,
which will last the life of the roof construction".
(Ruberoid, Breather Membrane,
There are also several other
manufacturers of quality breather membrane who's logos appear on
the materials page.