Proper use, adjustment and maintenance of the PINUS products guarantee a long-lasting and faultless exploitation.

  1. At least once a year there should be carried out through overhaul and done a necessary maintenance job:
    - The hardware should be inspected whether they are still steadily fastened and not worn out. All closing parts should get easily into proper catches and press evenly the wing to the frame. The parts should also be kept clean and lubricated once a year,
    - opening and closing of the window wings should be done without unnecessary effort, when the effort can be felt, an adjustment should be carried out.

  2. No other cleaners should be used but those which do not harm the anti-corrosive protection of the hardware.

  3. Proper maintenance of the varnished surfaces can be ensured by:
    - keeping the windows clean,
    - using only mild cleaners – no use of substances containing solvents as well as chemically aggressive and scrubbing substances.

  4. Twice a year (having cleaned the windows thoroughly) should be used GORI, a special protective substance – available from the woodwork manufacturer

  5. Damaged varnish should be repaired as it comes, using GORI renovation varnish which is also available from the woodwork manufacturer.

There is close link between the damage to wooden windows in winter and the quality of airing rooms.

This is why we have decided to advise you how to properly air room.
There is often misunderstanding as for connections between air humidity, the amount of CO2 in the air and the demand for energy in order to air the room. People are also unaware of consequences and damage that may result from the fact that they are not familiar with them.

The amount of vapour at the building stage.
While new buildings are drying out their inner plaster and screed are giving off a great amount of vapour.
The relation between the amount of the water that is given off and the time in which the water diffuses thorough the walls and windows without airing, can be explained with such an example:
In the case of 30m2 room ( the height – 2,5 m) the screed (4cm thick) and plaster ( 1,5 cm thick) give off in 4 weeks of drying around 500 litres of water. Through varnished window frames of standard size 1,25 x 1,25 m and wit closed windows as little as 1gm of water, that is 1,25 litre of vapour can diffuse in an hour ! Assuming that window frames take up 4% of the wall surface and thus only 4% of the water that is given off (about 20 litres) diffuses through window frames, so the process of drying of the room would last over 2 years. The conclusion is obvious – the vapour will not get out of the new buildings soon enough unless it is properly aired while drying the screed and inner plaster.
The consequence of the lack of airing is so called winter damage. The vapour penetrates the wood through weak points (e.g. glass rebates or poorly varnished outer parts of the frame), gets condensed and increases the dampness of the wood to over 30 %, which in turn causes difficulties in opening the windows and damages the glued places or increases the danger of an attack by fungi which might destroy the wood. In extreme cases there appear – the blisters can be filled with water.
This kind of damage can be prevented both when plastering is carried out and while drying out the room – through proper airing (e.g. leaving the windows slightly opened).

The amount of vapour in closed areas.
The vapour is non-toxic, colourless and odourless gas which is continually given off in great amounts in inhabited buildings ( in a 4-person household an average 8-15 kg of vapour is given off daily, which equals to the volume of about 10000 – 19000 litres).
The relative humidity of the air ranging 40-70 % is felt as normal.
Too dry air may cause creation of electric charges as well as drying out mucous membrane. When the air is very dry 9 below 40 %) a discomfort may be felt, as it is when some bacteria and viruses get activated – those responsible for illnesses of upper respiratory tracks.
The situation in which relative humidity of the air above 60-65 % prolongs, causes condensation of the water in cooler places on outside walls, which is an ideal nutrient for moulds.

The condensation of the water can be prevented by:
- Thorough insulation of the house from the outside and there should not be any places left un-insulated. Besides, if it is possible, the places endangered by liquefaction should be given inside insulation. The probable places are: corners, window frames and joining points of the ceiling,
- active airing through windows so that the humidity in the room does not exceed 50-55% ( it is necessary to have a hygrometer to check the inside relative humidity).

Carbon dioxide
Carbon dioxide is continually created as a result of breathing. Too high a concentration of carbon dioxide in a room makes people feel tired and causes a decrease of concentration. Depending on how active the people are, there are 10-75 litres of CO2 given off per person in an hour. Thus, in 4-person household, in order to keep the concentration of CO2 below the critical level, there should be daily 2000-3000 m3 of fresh air. It means that in a 75m2 flat there should be a full exchange of the air every 1,5 – 2 hours and in a 140m2 house – every 3 hours.

Airing through windows
The purpose of airing is to get the best possible quality of the air in the room with minimum use of energy:
- how long the room is to be aired depends on the outdoor temperature. A complete exchange of the air in the room with wide opened window requires 4-6 min in winter, 10-15 min in spring and autumn, 25-30min in summer,
- even a light wind can double the exchange of the air. The bigger is the difference between the inside and outside temperatures, the faster the warm inside air tends to get off through the open window. This explains why the time necessary to exchange the air in the winter is much shorter that in other seasons.

The vapour that arises while drying out the screed and inside plaster has to be driven outside by proper airing of the room- otherwise the dampness may cause some damage at the stage of building.
When the room or house is inhabited it also has to be aired so that that the people can enjoy the nice climate and fresh inside air. This is the only way to prevent the development of the mould and avoid any damage caused by dampness.

Here are some useful practical tips:
  • do not air more than one room at a time, while airing more rooms and causing a draught three minutes will do to exchange the air,
  • active airing is advisable only when the room is inhabited, if nobody lives there, the room will be aired by itself – through the cracks,
  • widely used airing through a tilted window often causes too fast an exchange of the air,
  • during the 6 cold months there is no need to do anything but leave the window ajar for no longer that 7-20 min per 24 hours,
  • airing the room through a wide open window, which is advisable, is energy-saving if it does not last long (4- 6 min),
  • continuous airing has good results if it is done with adjustable ventilators. One of them will do for a room,
  • on all the occasions of the active airing it is the outside temperature that decides how long the window may be open. The colder it is outside, the shorter should be the airing due to the increased thermics.