synthetic roof underlayment
• The intrusion of rain and water vapor into the building envelope system will reduce the effective thermal resistance of the insulation layer
• Air flow into the building envelope system to form convective circulation, will also reduce the performance of insulation
• Increase the heating equipment to ensure that the indoor temperature is suitable, thus increasing the building energy consumption.
Waterproof breathable roof film synthetic roof liner for sloping roofs
Durability of the building
• Rainwater and water vapor invade building envelope system, erosion building materials,
• Accelerate the aging of building materials, thus affecting the durability of the building.
The intrusion of air flow has an adverse effect on the thermal comfort of the room.
• Pollutants and radiation enter the room through the air flow, thus affecting the indoor air quality.
The water vapor entering the inside of the building envelope is sealed in the structure for a long time, resulting in the generation of moisture and the formation of mold, thus reducing the comfort of living.
undefined condensation phenomenon Because the higher the air temperature, the more water vapor can be contained, that is, the higher the saturation temperature; On the contrary, the lower the air temperature, the lower the saturation temperature, when the temperature drops and below the saturation temperature, the water vapor will condense in the state of water droplets and separate from the air, which occurs dew phenomenon.
• When roofing underlayment and condenses in the insulation layer, it will reduce the thermal efficiency of the insulation layer and cause moisture problems such as mold on the inside of the external wall. Due to the existence of indoor and outdoor temperature differences, the phenomenon of condensation is difficult to avoid.
• Due to the synthetic underlayment of traditional waterproof coils (such as asphalt waterproof coils, etc.), water vapor cannot be discharged freely, resulting in the formation of mold.
Therefore, it is important to ensure the steam permeability of the building and make the water vapor diffuse to the outdoor form to achieve natural drying.
To sum up, the energy saving, durability and comfort of the building are closely related to the air tightness, water tightness and steam permeability of its enclosure system, and the synthetic underlayment membrane enclosure system is to achieve the energy saving, durability and comfort of the living environment of the building by improving the above factors.
