Frequently asked questions

Useful information when choosing joinery Useful information when choosing joinery

If you are hesitant in your choice, ask us for advice

What joinery should I choose for my home?

This is a strictly individual decision. The choice of joinery depends a lot on the region in which the home is located. What are the climatic conditions there? Is it subjected to strong wind pressure? On which floor is the apartment located? What is the direction exposure of the premises? That is why our specialists are at your disposal and will offer you the best option. We have distributors in almost every district of Varna to provide convenience for our customers and contact with the nearest office.

In addition, we offer a completely new service for our city - a mobile office. After a call and a request for a visit from you, our specialists will visit you at a place of your choice. In a specially equipped minibus you will be able to see, get acquainted with the qualities and try samples of our joinery, our consultants will advise you what kind of joinery is best to order and will prepare an offer.

2. How do I choose the company to order joinery from?

We recommend that you choose a company that has an office, has samples and a place where you can go and get acquainted with the products they offer.

Require documents for the obtained right for production of joinery - certificates, references. Every self-respecting company that offers a quality product should have them.

The joinery must have the CE mark, which is a guarantee that all requirements are met.

Sign a contract! It will describe the conditions, terms, penalties, guarantees, etc

Always request a payment document. It is your guarantee when you will seek your rights in case of a problem.

Request warranty service. By law, the warranty on the windows is five years. Do not agree to a smaller one.

Choose a company whose production base is close to you, because that way they will react faster in case of a problem.

3. When is the best time to change your joinery?

We may shock you, but the best season to change your windows is winter. We know this will embarrass you, but let's tell you why we think so. First, in the winter, because it is not the season of repairs the demand for joinery is less, companies make promotions and are more inclined to discounts. So you will get a better price for the joinery you have chosen.

Second, the masters are freer, due to the reduced volume of work, they will be more careful and will do their job more precisely, and will not "beat" you, rushing to the next customer.

Third, it is the right the moment when you can find out if there is a problem with the windows. Usually when you install it in the summer, the problems shine through during the first heating season, but months have passed. And now it will become clear immediately if there is a problem and we will react immediately.

The biggest concern of customers is how they will let their home open in the cold. In Varna the winters are not very cold and even December sometimes has positive temperatures. In addition, after the old ones are removed, the new windows are installed immediately. So your home will not be left unprotected. On the inside, you can start finishing work right away. The concern of most customers comes from the fact that they will not be able to insulate the windows. Usually a gap of 3-4 cm remains outside, which is filled with polyurethane foam, which does not allow rain and snow. And already in the spring you can call a company to make your insulation from outside.

That is why we recommend our customers to change the windows in the winter.

4. I have damp spots down at both ends of the windows. What is the reason for this?

Usually in the new construction after the installation of the joinery it is foamed and plasterboard is placed inside and insulation outside. The warm air passes through the plasterboard and reaches the cold foam, where it condenses. Accumulated moisture dies under the windows at both ends. We have a solution to this problem and it is the placement of a parodiffuse membrane around the perimeter of the windows. The membrane is similar to a textile tape that is placed around the perimeter of the windows and it does not allow water vapor to pass through.

5. Can condensation appear between the two panes?

It can, but it's a sign of a default on the glass packet. It must be replaced. In our company within five years replacement is at our expense. Keep in mind that glass packets have a certain lifespan. If it is produced by the standards their life is over 10 years. How much will they last depends on many factors - way of production, number of barriers, type of adsorbent, size etc.

6. How to solve the problem of condensation at home?

Condensation worries everyone who decides to change their windows and always the first question customers ask is: will I have condensation when I replace my old windows with new plastic or aluminum ones.

Condensation is a problem that occurs with windows that insulate well. When we change our windows, we literally seal our home and if there is no good ventilation, condensation appears.

What are the solutions?

The first thing is to provide fresh air into your home. This happens if there is a good ventilation system, but this is rarely an option in our homes. Public buildings usually have one.

That is why we offer installation of valves in the joinery to ensure the flow of fresh air. There are two types of valves: manual by Renson and automatic by Aereco.

How do they operate?

You have probably noticed that when the windows are closed, the kitchen screen and the fan in the bathroom do not work effectively. This is because an underpressure is created. The valves we offer support the efficient operation of these devices. How does this work? They are usually installed in the upper part of the windows where in the upper third of the room warm and humid air is collected. By injecting dry cold air in the room, it pushes the moist air to the vents and they suck it in.

Many customers worry that this will make their room cooler. In fact, through the valves, which open a very small gap, the air enters at a low speed and when it goes down it has already warmed up and so you do not feel cold air.

Hand operated valves allow you to decide for yourself when to ventilate.

The principle of operation of Aereco automatic valves is different. When the humidity in the room becomes over 35-40%, the sensor built into the valves begins to gradually open them and let in fresh air. When the humidity normalizes, it closes the valves. The valves work without electricity, they are silent and have an elegant design.

You can order us to install the valves during the production of the joinery, but this can be done at any subsequent stage.

We also offer the micro-ventilation function, which we can build in the hardware to provide fresh air in the room. What is the effect of this feature? When you turn the window handle at an angle of 45 degrees, it opens a small gap through which fresh air enters.

The other way we work to solve the condensation problem is to make the window warmer. Why is this necessary? According to the laws of physics, when warm moist air touches a cold window - it condenses. Therefore, if we make our window warmer, we will reduce this condensation. This is done by placing special glasses - K-glass or all-season glass. That is why the choice of glazing is important. K-glass, by comparison, increases the thermal insulation of the window compared to two ordinary white glasses almost twice. The coefficient of thermal conductivity of the double-glazed unit with two white panes is over 2.5. If only one K-glass is placed and argon is released between them, this coefficient becomes 1.1. In other words – installing only one K-glass is like installing two windows one after the other.

The four-season glass has the same coefficient, but it additionally has a solar factor, i.e. it stops the solar energy coming in. By raising the temperature of the glazing we reduce condensation. If we put triple glazing, the coefficient from 1.1 becomes 0.6 -0.8. Glass package with four seasons

white K-glass has a heat transfer coefficient of 0.6-0.8. For comparison, the heat transfer coefficient of an insulated brick wall is 0.3-0.5. The triple glazing with two four seasons special glasses and K-glass inside approaches by its thermal insulation features a standard brick wall.

There is one more thing that can be done to reduce condensation. Dew always begins to appear on the perimeter of each glazing. The reason for this are the spacers. They are made of aluminum and around the perimeter the windows are the coldest and that is why the moisture condenses there first. To avoid this, specially designed plastic spacers are now available on the market. Using such a spacer, we make the entire glazing evenly warm and dewing around the perimeter is avoided.

Other tips to help you deal with condensation are:

Install heaters under the windows. Thus the warm air, rising upwards, will raise the temperature of the joinery and so there will be no cold surface against which the warm air will condense.

Whenever you can, it is good to pull the curtains and lift the blinds from the windows so that the air around the windows can move and not be able to condense.

Ventilate properly! This is done by opening the window wide for a few minutes. If in the room it is 20 degrees and you open the window wide for a few minutes, the warm air, which is with high humidity, is replaced by cold one, which is usually dry. It heats up quickly and when you close the room it will be 20 degrees again. Moreover, in a few minutes the walls and furniture do not have time to cool down.

7. How to choose glazing?

The double-glazed packages we use are of high quality. They are extremely important because they occupy 85% of the window opening and the comfort in our homes depends on them. We offer 32 mm and 44 mm double-glazed windows. There is currently a wide variety of window glass on the market with which we can achieve maximum comfort in our homes.

Let's start with the most familiar - low-emission K-glass. This is a float glass, which is "fired“ in special chambers with titanium or silver ions and thus a thin metal film is formed on its surfsace. When heated or heated by the sun's rays, this film raises the temperature of the window. K-glass has a high coefficient of absorption and reflection of long waves, which are actually the waves of

heating appliances. This is exactly the reason why the double-glazed unit, which includes K-glass, has 30% better thermal insulation properties than a double-glazed unit made of two ordinary panes. We recommend that you do not install ordinary double-glazed windows in your homes, because in this case the condensation will be very large. It is best to put K-glass on the inside, which will save you money on heating and at the same time, as the window gets warmer, you will not have a problem with condensation. The increase in the cost is insignificant, but the benefit is great. K-glass is mandatory for northern facing windows. It is not good to install such glazing in western facing windows, as it can create a greenhouse effect.

In recent years, more popular becomes four seasons windows glass, also called all-season. This glass has a solar factor, i.e. stops about 50-60% of incoming solar energy. It is recommended for southern or western facing rooms, where the summer sunshine is intense. By placing such glass on the outside of the glazing, it will not allow the temperature in the room to rise too much and it will be easier to cool. To achieve this solar factor, a special film is placed on the surface of the glass, which reduces the light transmission of the window, which some customers do not like. But there is a solution for that. The Four Seasons SUN system is now available on the market, without such shading.

Recently, the most ordered and as it turns out, the most effective is the glass package made of:

four-season glass on the outside

white in the middle

k-glass at the room side.

The choice of glazing depends a lot on the exposure of the premises and what we aim to achieve by changing the joinery with modern one. We provide a variety of combinations of glazing and will offer you the best solution.

8. Ventilation valves

Very often our customers are worried about the appearance of condensation after replacing the joinery. We have a solution to this problem as well. In fact, condensation appears because good joinery literally seals our homes. The lack of fresh air and ventilation for the premises leads to a change of the optimal humidity. The warm air reaches the windows, which are cold, and condenses there. To avoid this problem, we offer special valves that we install in the windows. They provide a supply of fresh air and ensure efficient operation of the kitchen screen or ventilation fan in the home.

The valves we offer are of two types - manual by Renson and automatic by the French company Aereco.

The Renson valves are adjusted manually, i.e. when you feel that the humidity in the room increases, you open the valves and when you decide you may close them.

Aereco automatic valves are mounted in the sash wings. They work completely automatically, silently and without electricity consumption. They have an elegant design and are suitable for all types of windows. It is best to install them during the production of the joinery, but they can also be installed additionally. The models we offer also have manual valve closing.

When the humidity in the room increases, the built-in sensor activates a mechanism that opens the valve and increases the flow of fresh air, and the old air exits through the ventilation system.

The humidity sensor is set at the factory not to react to relative humidity in the room up to 35-40%. Above these values, it begins to gradually open the valve, allowing fresh air from outside and thus creating sufficient draft to remove moist, polluted air through the vents.

Our customers often worry about not cooling their homes. This will not happen because the flaps open a very small hole. In addition, they are placed in the upper part of the windows, where the more humid warm air is collected. When they open, dry cold air enters, which expels the moist air through the fan or aspiration. And while the fresh cold air falls down, it warms up and inhabitants don’t feel like an influx of cold air is let into the room.

9. What types of consultation can you offer me?

Depending on your needs, a variety of combinations can be made to get maximum comfort when using your new windows. Types of consultations:


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