1. How dose the aluminum foil insulation work?
Aluminum foil insulation cannot absorb heat but can reflect over 97% radiant heat. When it is used as the facing material for traditional insulating materials, it can effectively increase the R-value of them. Due to its high reflectivity of radiant heat, there is only small quantity of heat reaching traditional insulation materials. Hence, a much longer time will be needed for the traditional thermal insulation to absorb heat exceeding its absorbing capacity. Thus, the outdoor heat cannot pass through the insulation materials easily to enter into rooms. This is how the aluminum foil insulation offer thermal insulation function.
2. How to correctly use the aluminum foil insulation materials?
It is necessary to leave 2cm space between the aluminum foil insulation material and the material it is attached to. This prevents heating of aluminum foil insulation caused by contacting, so as to ensure thermal insulation performance.
3. What is R-value?
The R-value is a measure of thermal resistance commonly used in the building and construction industry. It is used to express the thermal resistance performance of a building material. The higher the R-value, the higher the thermal resistance or thermal insulation capacity the material has. The R-value has close relationship with the material's thickness and thermal conductivity. On condition of constant thermal conductivity, the thicker the material, the higher the R-value.
4. Dose aluminum foil facing has R-value?
No. But aluminum foil facing, as a kind of radiant barrier material, is capable of reflecting heat, which discontinues heat transfer or heat convection. So, it can effectively increase insulation materials' thermal insulation performance.
5. What is radiant barrier?
Radiant barrier material refers to metallic materials being able to inhibit heat transfer. It is typically used under roof's rafter system, so as to prevent unnecessary solar heat entering into rooms. Aluminum foil with aluminum purity up to 99% is ideal radiant barrier choice, and its radiant emittance is between 2% and 5%. Radiant emittance is the power per unit area radiated by a surface.
6. Why use aluminum foil materials?
Approx. 75% thermal transmission is completed through thermal radiation. Majority building materials absorb radiant heat, and then radiate the heat, which makes the indoor temperature much higher than outdoor temperature in summers. Hence, the air conditioner has to work continuously to lower the temperature. Aluminum foil materials, including aluminum foil woven fabric, aluminum foil facing, double side reflective aluminum foil insulation, etc., can reflect over 97% radiant heat, so they can help create a comfortable indoor environment and help save electricity energy consumption.
7. Is it necessary to joint the joints using aluminum foil tape?
Yes, it is. Using aluminum foil tape for joint sealing can help achieve better vapor barrier function.