The three-layer breathable membrane, composed of thermal laminated non-woven PP, a waterproof and vapor permeable membrane, and non-woven PP, serves as roof deck protection. Its primary function is to safeguard the construction structure from wind and rain erosion, while also reinforcing gas tightness and water tightness. Moreover, it boasts excellent breathability, allowing it to expel water vapor and prevent the occurrence of mold and condensation. This versatile membrane is commonly used as an underlay on pitched roofs or walls in construction projects, where it excels in both water resistance and high vapor permeability.

Physical Property	Result	Test Method
Size	1.5M*50M
Colour	Orange
Thickness	0.55mm
Weight	145g/m2
Water vapour transmission	>600g/m2/24h	BS 3117(25C/75%RH)
Hydrostatic Pressure of Water	1500mm,2h No Leaking	BS EN 20811
Water Resistance	Pass	BBA T1/15(2)
Nail Tear Resistance	>50N(MD,CD)	MOAT 27:5.4.1
Tensile Strength	150N/5cm(MD),90N/5cm(CD)	EN ISO 527-3(Test Speed 100mm/min)
Bending at low temperature	-30C No Cracking
UV Resistance	3~4 month
Aging Test under Hot Air(80C,168h)	Visual Inspection	No powder,No layered
	Retention rate of Tensile Strength	>80%(MD,CD)
	Hydrostatic Pressure of Water	1000mm,2h No Leaking
	Water vapour transmission	>1000g/m2/24h

145gsm Vapour Permeable Waterproof Roof Underlay Membrane

1) Breathable membrane with excellent waterproofing properties.

2) High water vapor permeability.

3) Stable anti-UV & anti-aging performance.

4) 3-layers thermal laminated: PP+PE+PP.

5) Light weigth so easy handled.

6) Excellent tensile and tearing strength.

7) Good low temperature flexibility.

8) For both roof and wall application.

9) High quality with very competitively price.

In addition to its protective function, the installation of an external breathable membrane is an essential step in ensuring proper ventilation and moisture control in roofing systems. This membrane allows water vapor to escape from the roof while preventing the ingress of moisture from the outside. By incorporating an external breathable membrane, the risk of condensation and subsequent damage to the roof structure and insulation is significantly reduced.
Similarly, the installation of a breathable roof membrane is crucial in maintaining a healthy and efficient roofing system. This type of membrane is typically placed on top of the thermal insulation material, ensuring that any moisture that accumulates within the roof structure can escape without causing damage. By allowing for the efficient evaporation of moisture, a breathable roof membrane helps to prevent the growth of mold and rot, preserving the integrity of the roof and the overall building structure.
Lastly, the construction of a breather membrane is an important aspect of ensuring the overall performance and longevity of a roofing system. This membrane is typically installed within the roof structure, acting as a barrier against the ingress of moisture while still allowing for the escape of water vapor. By incorporating a breather membrane, the risk of condensation and subsequent damage to the roof and building structure is minimized, ensuring a healthier and more durable roofing system.

Overall, the addition of external breathable membrane, breathable roof membrane installation, and breather membrane construction are crucial steps in enhancing the performance and longevity of various roofing systems, including wooden pitched roofs and metal roofs. These membranes provide essential protection against the destructive effects of weather while facilitating proper ventilation and moisture control.