Why do plastic windows sweat and is it possible to get rid of condensation?

On the one hand, plastic windows create comfort and warmth in the house, and on the other, they add hassle when condensate accumulates on the glass units. The same fate falls on the share of greenhouses from plastic structures. What to do with it?

First of all, let's see where water drops appear on the glass and why condensation forms on various objects.

Why do plastic windows sweat?

The windows in the house or apartment sweat mostly in winter. And more often condensate accumulates from the inside - from the side of the room. Contrary to popular opinion, it’s not the windows themselves (in their poor quality), but inadequate ventilation. Fogging windows is not a design defect, but a physical phenomenon.

People who have recently replaced wooden windows with plastic, believe that plastic just does not "breathe", unlike wood, so condensation forms on it. In fact, the outside dry air is not passed by the wooden windows themselves, but by the gaps in the frames, which we are in a hurry to get rid of, because in the winter a cold wind blows through them.

Therefore, if we ensure an adequate supply of fresh air to the apartment, there will be no condensation on the sealed windows with double-glazed windows. At the same time, if you eliminate all the cracks in the wooden frames, such windows will sweat.

Usually the window fogs up from the bottom up, and most of all the liquid accumulates at the edges, at the places where the glass and the frame join. From there, the water flows on the windowsill and forms puddles. But not only this causes discomfort. Excessive moisture leads to mold. And these spores of the fungus, we are forced to breathe.

Also, condensate can accumulate on the windows, if there is a container with water on the windowsill, because the higher the humidity level in the room, the more condensation will form on the glasses.

Fogging is the process of forming small droplets of water from steam that combine to form large drops.

Condensate accumulates due to the fact that the warm air in the room is intensely cooled near cold windows. In summer, the windows, as a rule, do not sweat, because they heat up in the sun, and on a warm glass the steam does not turn into liquid.

How to get rid of condensation on the windows?

To prevent the glass from misting up, you need first reduce the humidity in the room and / or raise the temperature of the glass. The simplest solution is often to air the apartment so that the flow of fresh air is constant. But this is not always possible if all the tenants have been absent from the apartment for a long time. Then install the supply valve in the window or the ventilation valve in the wall will help.

In addition, check the ventilation grilles in the house (most often they are located in the kitchen and in the bathrooms). They must be clean and in good condition.

Consider: the farther the room is from the ventilation, the faster water vapor accumulates there. In this case, you need to organize the flow of air between the rooms: in the door panels make special overflow holes (lattices). And between the floor and the door there should be gaps 1.5-2 cm high.

To increase the temperature of the glass, you need to choose the right window sill. It should not be too wide. Ideally, the window sill should not block the radiator. The fact is that warm air rises and heats the windows. If the radiators are in niches or are completely covered with a window sill, then ventilation grilles should be placed under it.

Rolshtora and blinds are located close to glass and interfere with air exchange. As a result, the likelihood of condensate accumulation increases. Therefore, it is better to give preference to classic curtains made of fabric, and they need to hang so that the fabric does not fit to the window sill. Therefore, the choice of the eaves also need to be approached responsibly.

With abundant accumulation of condensate on the window, it is better to refuse roller blinds.

Also, to increase the temperature of the inner surface, you can install a more "warm" window profile. For PVC - 4-5-chamber profiles with a thickness of at least 70 mm. For laminated wood - profiles with a thickness of more than 78 mm. For aluminum windows - profiles with a thermal bridge of 30-35 mm.

In addition, in the glass unit it is recommended to replace the aluminum spacers with frames made of polymeric materials with low thermal conductivity. This does not relieve the windows from condensation completely, but the temperature in the edge zone of the frame will increase by several degrees.

Remember the main thing: even if you are afraid of the cold, do not give up ventilation and do not close all the holes in the house. The hood must always be in good condition.

Watch the video: HOW TO STOP CONDENSATION ON WINDOWS. Stop condensation in winter on windows (August 2019).