The appearance of mold after the replacement of windows

The growing, black mold appeared in the corners of the walls and ceiling after the assembly of PVC window. There is also a noticeable dampness on the walls that takes form of the drops of water. There may be a few reasons why the mold appeared, firstly we recommend to check and improve the working on the gravitational ventilation. Checking should include the control in the ventilation sector is unobstructed, then the needed amount of air should be brought into the room from outside, it may be done with the window ventilator, such as www.brevis.com.pl or www.aereco.com.pl. The air humidity should be of 55-60%. The apartment should be properly heated to avoid the frost damaging of the walls.