Why do plastic windows fog up inside

Plastic windows are becoming more popular year after year thanks to their m m number of positive qualities. They isolate the apartment rooms from street noise, keep heat well, do not require complex care arrangements, have a presentable appearance and, at the present time, the - has an affordable price.

become cloudy? However, like all the elements of home improvement, PVC windows have their drawbacks, which include the appearance of moisture on glasses during the temperature difference. Why do plastic windows fog in and how to avoid it? This issue is of concern to many homeowners, has double-glazed windows installed, because such manifestations lead to mold around the frame, and they can later spread to the rest of the walls.

Reasons for the occurrence of

As you know, the hot air in the room rises , so it is often damp, and then fungus occur in the upper corners of the frame. This is due to the temperature drop warm air coming from the apartment and cold, penetrating from the street. The most pronounced difference between them is created by at the top of the frame. When they "collide" and there is a condensation, but only in the event that there are no ventilation elements that contribute to permanent weathering of moisture. This manifestation can be characterized as the formation of a "dew point", i.e., the creates an temperature, with the of which the moisture in the air turns into a condensate, the which flows down the glass from the . By the way, it can also be actively formed at the bottom of the window.

There is also still a number of reasons contributing to the formation of condensation in the "dew point":

• Sharp changes in atmospheric pressure, usually accompanied by similarly abrupt weather changes. It is clear that it is impossible to influence this person.
• Increased dampness in the room, for example, coming from the basement, especially in apartments located on the first floors of multi-storey buildings.
• Excessive humidity resulting from food preparation or long-term steam supply - mainly refers to kitchen and bathroom areas in private homes where small PVC windows are often installed.
• High temperature in the rooms of the house, with very low outside the window. In such cases on the windows windows, even icing can occur - freezing of the condensate at the bottom of the window.

• The integrity of the insulating glass unit is considered undeniable, but it also makes it impossible for materials to "breathe", which also causes the fogging of glasses.
• A large number of indoor colors can also cause condensation on the windows. The plants require periodic irrigation, which the gives the a certain amount of wet fumes, and they, having no outlet due to the tightness of the structure, settle on the windows .In addition, if the flowers are mounted on a windowsill in a dense series, they block the flow of warm air from the batteries to the frame and window glass, which also causes temperature changes and the leads the to condensation.

• The condensation on the window frames can be caused by the fact that the window sill too wide blocks the from entering the warm air from the battery to the window, pointing it towards the room. According to the rules, the heated air should be directed to the px and windows, creating a thermal curtain, preventing the cold from entering the room, while actively ventilating the window surface.

• window. Household reasons such as repairing mortars and adhesives, as well as drying of under the conditions of an apartment in winter are also the reasons for the formation of moisture droplets on the plastic windows.
• It is impossible not to mention the errors that could have been made during the installation work of during the installation of frames. They are very often the cause of condensation. To the most widespread installation defects can be attributed:

- glass blocks made with deviations from the production technology, which do not correspond to the declared quality and characteristics, and therefore unable to protect the house from cold, draft and noise;

- components selected for window mounting that do not comply with this design;

- poor-quality sealing of foam joints between the double-glazed window and the wall;

- Insufficient warming of slopes from the side of the street, as a result of which cold air penetrates into the seams between the wall and the frame;

- use of poor-quality materials in the manufacture of insulating glass;

- no or incorrect position of the drainage holes in the frame.

• The cause of condensation, icing and mold spots on both the frame and around the of its may be the discrepancy of the thickness of the double-glazed window to the climatic conditions of the region. At winter temperatures below 20 degrees, single-chamber - double-glazing units are not suitable because they are simply not capable of protecting the premises from cold in winter frosts due to their characteristics. Therefore, at low winter temperatures, double-glazed windows can save wind and freeze, and the PVC frames( the profiles from which they are made) must have at least 5 chambers.

Video: The main causes of misting plastic windows

Solving problems

To solve problems that depend on the owner of the apartment, and to get rid of condensation, needs to take some affordable measures.

Normalization of humidity and temperature

Knowing the causes of condensation on glasses and window frames, you can start looking for a solution to this problem. For this, it is necessary to perform certain actions to reduce humidity or increase the temperature in the premises. Having done this, you can largely get rid of the occurrence of such an unpleasant manifestation.

To be aware of the relative humidity level in the room, it is necessary to acquire a hygrometer. The "dew point" directly depends on the level of humidity and temperature outside the window and inside the room. To know what temperature and humidity parameters lead to the formation of condensation, refer to the following table:

Indoor temperature	0	2.5	5	7.5	10	12.5	15	17.5	20	22.5	25
humidity level	Temperature near the panes resulting in the formation of a "dewpoint"
20	-20	-18	-16	-14	-12	-10	-8	-5.5	-3.6	-1.5	-1
30	-15	-13	-11	-	-6.5	-4.5	-2.5	-0.5	2	4	6
40	-12	-10	-7.5	-5	-3	0.5	1.5	3.8	6	8	10.5
50	-9	-7	-4.5	-2.5			0.1 2.5 4.5 9.5	7			14
60	11.5 -4.5 -7		-2		0.3 2.5 7.5	5			12	9.5 14.5 16.5
70		-4.5 -2.5 2.5	0		5	7	9.5	12		17	19
80	-3	14.5 -0.6 4.5	2		6.5	9	11.5	14	16.5	19	21.5
90	-1.5	1	3.5	6	8.5	11	13.5	16	18.5	21	23
100	0	2.5	5	7.5	10	12.5	15	17.5	20	22.5	25

PVC window manufacturers specify in the operating instructions for their operationThe recommended temperature values ​​at which the formation of condensate will be minimized. Ideally, it should be at least 18-20 degrees Celsius. The optimal way to maintain certain temperature, which will help to save not only the window and the walls of the room from the appearance of mold, but also the health of the tenants of the apartment, can be radiators or convectors with a built-in thermostat.

And the easiest way out of this situation is regular airing of the room, which should last for 10 ÷ 15 minutes twice a day.

But a more effective way to get rid of the condensation on the windows is the permanent ventilation in the plastic frame.

Ventilation of PVC windows

In order to ensure the correct ventilation of plastic windows, their manufacturers have introduced several devices, which should not be abandoned when choosing a model.

• " Comb", mounted on the frame, which will open the sash to the required distance .

• A conventional window, provided by the window design.

• A leaf that can be opened in two positions - completely and for ventilation, with the opening of the opening for 10 ÷ 15 cm.
• Comparative novelty in the construction of windows is a slotted ventilation when the window leaf moves away from the frameliterally a few millimeters.

• The ventilating valve , which is able to regulate the airflow into the room.

• Self-regulating ventilation, which performs air exchange as required, by means of channels in the profile chambers or special climate valves. valve - is a plastic box in which a special movable feather is made of plastic. It controls the incoming air, reacting to the intensity of the air flow. Thus, when the wind on the street increases, the pen itself is covered, and in its absence, the valve is open, so there is no draft in the room.

air valve. The climate control valve is installed in the upper section of the frame. If the window area is large enough, then a set consisting of two valves is installed.

Qualitatively arranged ventilation will solve most of the problems associated with the formation of condensation on the windows.

Ventilation Valve The just is installed enough for ventilation in the PVC window, and the whole process of the will not take the much time. The kit with apan includes everything you need to install it. From tools you need a construction knife and screwdriver with a cross head.

This element is mounted on the top panel of the balcony door or any opening window leaf. The main - select the correct valve size.

• First open the flap and apply the valve to the planned installation site in order to mark the length of the rubber seal to be removed. Later, will be replaced by the seal that comes with the valve.
• Next, the seal is neatly cut out. In the places of its cut, along with the remaining sealant and in the middle of the gap that formed in the groove, where the rubber band was previously installed, attach special devices - plugs with holes for the screw. Through them, the valve will be screwed into the sash.
• Then the valve is installed on the valve. It has a layer of double-sided scotch on the bottom plane. It is necessary to remove the protective film and glue the body to the upper end of the leaf in the right place. Then, self-tapping screws are inserted into the eyelets with holes and screwed into the previously installed plugs. So is provided by the reliable valve connection with the window sash.
• The kit must include two pieces of seal, which are inserted into the grooves of the valve between the screwed screws
• When finished with the flap, you can proceed to work with the frame seal. On the it also marks the length of the rubber band to be cut. This part, to be removed, should be located exactly opposite the valve installed on the leaf.
• Instead of remote , a new seal is installed from the kit.

This completes the work. It is only necessary to close the sash and move the valve regulator in the desired direction, to the closed or open position.

Video: self-installing the simplest ventilation valve

This work can be done by any owner or even owner apartments, since nothing complicated and heavy in this process is not.

Problem in installing

If the condensate continues to collect after the valve is installed and regular ventilation, and the mold does not come off the walls, the cause should be sought in the correctness of the general installation of the window or of the product itself.

. In order to identify the cause in this case, it is necessary to invite a specialist who will perform an revision of the insulating glass unit and the quality of its installation. After the check, the wizard will be able to give a qualified conclusion about whether the situation can be remedied by eliminating the flaws in the incorrect installation, or still will have to replace the window with a new one.

To get rid of the condensation on the window will not be difficult, if there is a problem in insufficient ventilation of the room. You need to conduct a number of simple and affordable activities, and you can forget about the unpleasant puddles on the windowsill or ice on the glass.

It will be more difficult to solve the problems if the manufacturer and the installer of the double-glazed window got unfair, and performed the installation process somehow. In this case, sometimes only radical measures will help to cope with the occurrence of condensation.

Video: how to install the automatic supply air valve