Items | Test methods |
Glass felt /confirm/ied | After tearing tiles, you find rib felt, use the compound fetal, no quality guarantee. If find more glass fiber, using glass felt. imported tiles have the most glass filament. |
Asphalt /confirm/ied | Smell it after tearing shingles, if used defective asphalt, we will find tiles irritating |
Colored sand fading | Put the colored sand in a glass cup, add a little muriatic acid into the cup (or vinegar), and boil for about two hours, observe colored sands fading. imitate directly solar radiation and acid rain in real life |
Cold resistance | very simple, throw the asphalt shingle into the fridge freezers directly, freeze it for a few hours, then see if it occurs leaking sands, cracking, and so on |
Heat-resisting | Place the saiteng asphalt shingle in the oven, set the temperature 90 degrees. Position these strips overhanging vertically in the oven, after one or two hours, observe if surface flows, drips, bubbles, and so on |
Leaking sand | Directly rub the asphalt tile surface with the hand repeatedly, or bridle with high pressure water flushing, observe the leaking sand, if just few sand falling, it is normal, But if you rub or flush many times, led to sands fall more and more, even with asphalt layer coming out, so that the life of the tiles must be discounted |
Waterproof | Put saiteng asphalt shingle on the ground , and water it directly, then observe the waterproof effect. |
Wind resistance | randomly selected two pieces saiteng asphalt shingle, according to normal construction sequence fold them, put them under sun, One or two hours later the tiles have basically stuck together, can be found in one or two days ,it will be much firmer (in case of lower temperature, we can wait longer time to observe) |
UV resistance | Put tiles into an UV temperature box, then observe the tiles aging under exposure to ultraviolet rays, but it takes a long time, consider appropriately, |
Others | It relates to some professional equipment, ask testing organizations for inspection. |