Due to the ability of foam, the opposite bars in the door frame are pre -strengthened by spacers significantly increased in volume. If this is not done, then the pressure created by foam very often leads to damage and deformation of the door box. Before using a foam, you need to shake the foam, and also moisten the door box and the opening from the outside with water. Moisturization will contribute to improving the clutch of foam, in addition, it will also accelerate and harden. A very important point is not to overdo it with water, since it is quite possible to achieve a completely different and opposite effect. It is also not the last moment that the cylinder throughout the work should be in a state of inverted position. This helps that the light GA is the best as possible and mixes with other components of the cylinder. The mounting foam grows quite well with almost all types of building materials, in connection with which, no problems even arise. In the case of using foam, it is necessary to provide a temperature of 5 to 30 degrees. Although specially for the cold season, foams are provided, which are designed when working with a temperature of minus 10 degrees.