Risse an Dachfenster Scheibe, Fensterscheibe geplatzt, Glasbruch. Was tun? Dachfenster austauschen? Nicht unbedingt. Wir zeigen Ihnen Schritt von Schritt wie man das Scheibenpaket im FAKRO Dachfenster tauscht. Wenn Sie das ganze Dachfenster austauschen möchten, weil das zu Jahre gekommen ist nutzen Sie unsere Austauschfenster-Programm.

Bei Dachfenstern ist es schwierig, von einer Standardgröße zu sprechen. Der heutige Markt bietet in diesem Bereich viele Möglichkeiten, um die Wünsche der Kunden zu erfüllen. Am beliebtesten sind jedoch die Fenstergrößen zwischen 55 - 114 cm in der Breite und zwischen 78 - 140 cm in der Höhe. Dabei ist zu beachten, dass die Breiten und Höhen nicht beliebig kombinierbar sind. Die Größen werden von den Herstellern festgelegt und sind teils auch technisch bedingt nicht anders wählbar. 

Generell können für folgende Gewerke Fördergelder beantragt werden:

•     Dämmung der Gebäudehülle (von Außenwänden, Dachflächen, Geschossdecken und Bodenflächen), sowie Erneuerung/Aufbereitung von Vorhangfassaden;
•     Erneuerung, Ersatz oder erstmaliger Einbau von Dachfenstern, Fenstern, Außentüren und -toren;
•     Sommerlicher Wärmeschutz durch Ersatz oder erstmaligen Einbau von außenliegenden Sonnenschutzeinrichtungen mit optimierter Tageslichtversorgung

Jedes Gebäude verliert eine gewisse Menge an Wärmeenergie. Um diese Verluste zu minimalisieren empfiehlt es sich, das Gebäude zu isolieren. Als Hauptaufgabe der Isolierung betrachten wir die Sicherstellung der entsprechenden Wärmeisolierung der Außenwände der Gebäude zum Zweck der Begrenzung der Wärmeverluste aus dem beheizten Raum des Gebäudes in die Umgebung sowie die Vorbeugung gegen Entwicklung von Schimmelpilzen auf den Innenwänden der Gebäude. Gleichzeitig sollte jedoch vermieden werden, dass die Wärmeisolierung zur steigenden Wandfeuchtigkeit durch Konzentrierung von Wasserdämpfen in Innenräumen führt. Die Erfüllung dieser Vorgaben erreicht man durch die Wahl der entsprechenden Schichtdicke der Art der Wärmeisolierungsstoffe. Um den Wärmeisolierungsstoff und seine Schichtdicke richtig zu wählen, sollte man den Koeffizienten U* sowie den Wert des Koeffizienten Ep* errechnen. Die Berechnungen sollten von einem Projektanten durchgeführt werden, man kann diese jedoch selber mit den speziellen Rechnungsprogrammen, die man auf der Internetseite www.atlas.com.pl findet, machen. Am häufigsten wird in unserem Land die trocken-feuchte Methode der Wärmeisolierung, bekannt auch als fugenloses Wärmeisolierungssystem FIS, eingesetzt. Diese wird verwendet sowohl im Falle der neu gebauten Gebäude, sowie bei der Thermoisolierung der vorhandenen Gebäude. Diese Methode zeichnet sich dadurch aus, dass man an die Außenfläche der Wände eine entsprechende Schicht des Wärmeisolierungstoffes (Styropor oder Mineralwolle) anklebt, diese mit Mörtel beschichtet und in diese Schicht ein Schutznetz aus Glasfasern eingeschmolzen wird, um die Oberfläche anschließend mit dünnschichtigen Edelverputz zu beschichten.

Egal, ob es draußen sonnig oder bewölkt ist, der Frühling ist zweifellos da und mit ihm beginnt sich auch die Renovierungs- und Bausaison. Bei dieser Gelegenheit empfehlen wir Ihnen, sich mit dem breiten Angebot unseres Online-Shops vertraut zu machen. Bei uns finden Sie Verblender für Innenräume und Außenfassaden. Die hochwertigen Verblendsteine sind robust, leicht zu montieren und gehören zweifelsohne zu den edelsten Materialien für die Wandverzierung. Je nach Geschmack, Projektidee und Vorstellungen, aber auch nach den Anforderungen an der Montage und das Budget wird jeder etwas für sich finden.

Die beliebtesten Einfamilienhäuser verfügen heutzutage über ein ausgebautes und bewohnbares Dachgeschoss. Zimmer mit Dachschräge sind sehr gemütlich und anmutig, aber sie haben auch spezielle Anforderungen. Eine dieser Anforderungen ist die Auswahl geeigneter Dachfenster, um eine optimale Nutzung des Tageslichts und eine effektive Beleuchtung des Raumes zu ermöglichen.

How to Reduce the Heat in the room?

We get a lot of such a questions from our customers. And we know how to solve this problem.

First of all we must understand why during the summer attic becomes hotter than rooms that are placed below it. That's because hot air always goes up. So hot air enters the house, goes up and stays there, because it stucks on the roof's insulation. Then sun is shining directly on the roof, heating it from one side, and at the same time warm air is collecting on the other side.

Second of all - roof windows. They look really great in the roof, give possibility of excellent view on the landscape or the sky, make interior light. But, glass absorbes the heat and gives it away to the room. Those are "weak points" of the roof. There's no insulaton there - like under the tiles, glass "sticks directly to the interior". Also Roof windows absorbs more heat than vertical ones. Therefore - the more roof windows, the hotter is inside the room. And by hotter - we mean really hot. Sometimes it is hard to get asleep in such a hot room. Even if the evening is much cooler than the day, attcic won't get cooled that quick.

How to prevent from summer heat?

Well, you can't stop physics, but we can trick it somehow :-)

There is great product, that can help to reduce the temperature in the attic - awning blind for roof window. This is an excellent anti-heat solution. Awning blind supposed to be mounted outside the roof window. In that way, that it covers whole glass. Special mesh-fabric stops the sun, reflects the sunlight and doesn't allow it to get to the glass and through it. At the same time it doesn't limit the view. It gives little shade, but still you can see through it. Most common awning blind is a manual operated one - due to it's low cost and no problems with providing power supply. Very often an operation rod is included, for smooth manouvering. There are an extension rods available, if the standard one is too short, and window is to high. But here's also possibility of purchasing solar or electric awning blinds. It is a great solution for windows, that are placed high, beyond the hands' range. Operation by a remote control or programme opening and closing the blind at certain hours is possible then. They could be compatible with smart home system.

Many customers think, that regular blackout blind will handle problem of overheating. But unfortunately - no, it will not. Why? It's very simple - it is placed behind the glass, inside the room. That means, that sunlight will get to the glass easily and (perhaps in smaller amount than when there's no blind at all) through it.

Below there's a comparison between no heat-protection, blackout blind and awning blind:

Roof window with no accessories  g = 61% ( 0,61) according to EN 410

Roof window with blackount blind installed g = 37% (0,37) acording to EN 13363-1

Roof window with awning blind mounted
(depending on fabric used) g = 4-14% (0,04 − 0,14) according to EN 13363-1

As you can see, even up to 96% of sunlight can be stopped thanks to the awning blind.

Most probably you will discover a wide range of fabrics, that are being used in blinds. Some of them may have relative fabric transparency = 10%, others 1% or different values. That means that some of the fabrics are denser than others. They are less, or more transparent, and allow to see more or less through them. At the same time, if fabric has 1% relative fabric transparency, it let less sunlight to the interior. So they are more efficient, but also more expensive at the same time.

According to our experience though even 10% transparency fabrics help to cool the air in the attic. Even up to few degrees- accoridng to our customers. So it is not necessary to buy more expensive products.

• relative fabric transparency = 10%

• relative fabric transparency = 1%

Also - what is important you can find many products, that are compatible with your window, even if they are not being produced by the same producer. E.eg OptiLight blinds from Kronmat (a subsidiary of FAKRO) fit to FAKRO windows and vice versa. Blinds from RoofLite (the same VKR group) fit to VELUX roof window. Of course all necessary information should be given in a product's description.

How to choose awning blind?

• First af all you must know what type of the window you have. It is very important, because each producer has his own external and internal accessories to roof windows. E.eg. Awning blind from FAKRO won't fit to VELUX window etc. That's because each producer's window has different thickness of the frame, different shape of the frame, and holes, where the scrubs should be screwed, can be placed in a different places.
• After that you must know what size of the window you have. Please note that while buying accessories to roof windows you should always choose the same size as window's size. Of course awning blind itself will be narrower than the window, but is correct, it has to cover only glass. The best way for checking that is to find a window's nameplate. It supposed to be placed on the sash. You can find serial number there, but also type and model of the window and it's size as well.

• Then please check if the blind, that you found in the store or online shop is dedicated to your type of window. It supposed to be written in a descriprion. If you have any doubts, you can always send a picture of the nameplate to the customers service of the following store, and seller should help you to choose proper product
• if the product is correct, please choose size corresponding to the windows' size
• then only installation is left

How to mount awning blind

Installation is very simple, you should follow the instruction, which is added to each blind, together with simple tools. Each producer place a ready holes in the windows, where blinds' screws should be screwed. Thanks to that you don't have to drill in the window's frame, and there's no threat that you will damage the frame and unseal the window. A blind's box should be mounted outside, at the top the window, hooks to which the awning will be hooked, should be placed at the bottom of the sash.

There is wide range of awnings on our website: awning blinds to FAKRO, VELUX, RoofLite, Skylight, OptiLight, and many others: DAKSTRA, DAKEA, SOLSTRO, LUXTRA, LUMINATEC windows. Filters placed on the top and on the left side of the website will allow you to choose awning blind compatible to your window.

Few words about condensation

A common problem with windows is so called "sweating window", it mainly occurs on roof windows. Because they are mounted on the roof, they are particularly exposed to environmental impacts such as rain, hail and temperature changes. How it occurs? When a hot, humid air hits the cold window, it cools down and some of the moisture condenses on the window (the transition from steam to water is called condensation). The better the insulation in the attic, the higher the condensation level. Despite of the water vapor diffusion in the insulation layer, water vapor stays in the room / attic. Both new buildings and old but well-renovated buildings are particularly tight nowadays, which is of course good for the energy balance, but not perfect for the indoor climate. This means that moisture generated inside cannot escape.

A small amount of water vapor, which mainly settles on the glass and the surrounding elements, can be considered as a normal process. However, if you find that your window is filled with water vapor between the windows, it means that the window has lost its heat-insulating properties and must be replaced.

Especially during the winter season, you can see that small drops of water form not only on the window but also on the window frame. Condensation occurs mainly after activities that cause a high moisture level, e.g. cooking, washing or showering. This means that humidity plays an important role in counteracting condensation. It is known that water always arises where the warm, humid air meets a cold surface. As a result of the cooling, the air can retain less moisture, so that an excess is condensed and in the form of water droplets appears on the cold surface. The room temperature therefore plays an important role, as does the temperature difference between inside and outside. If the temperature differences are higher than 20 ° C and the humidity is above 60%, condensation occurs. Condensation occurs mainly during the colder season when the temperature differences between day and night are extremely high. When the air is heated, the condensation evaporates. If there are other factors, such as a lot of snow on the windows, in extreme situations it can even lead to condensation freezing on the inside of the frame and damaging the structure, especially wooden windows.

In general, condensate is not harmful. There are two areas where condensation can have a negative impact though:

• On the one hand, it stays on window's elements - wood is of course particularly sensitive here - but also the cladding around the window, which is often made of plasterboard. Moisture cam create the mold on such surfaces and destroy them.
• The second area is the health of the inhabitants. Living in a humid environment can lead to coughing and shortness of breath. And once mold occurs, there are other negative effects on health e.g. allergic reaction.

how to stop condensation on windows?:

• Short-term ventilation - the windows should be fully opened 3-5 times every day for 10-15 minutes at a time. If there is a possibility to do a draft, it is even better. To do this, simultaneously open two roof winows that are placed opposite each other. In this way, you can quickly achieve an air exchange with minimal heat loss.
• Windows with natural ventilation - this allows a constant air exchange between the damp inside with fresh outdoor air even when the window is closed.
• Keep the room temperature as constant as possible throughout the day. Recommended temperatures: bedroom 18 ° C, children's room, bathroom 23 ° C, basement - not less than 15 ° C. The humidity should be between 40-60% in the apartment and up to 70% in the bathroom.
• Regularly remove condensate / water vapour to prevent mold.
• Location of radiators. It is recommended to install a radiator under each window. There should be a distance of at least 10 cm between the window sill and the radiator to ensure the hot air circulation. In this way, the extreme cooling of the window glass can be avoided and the risk of water vapour occurance reduced. In addition, the rising hot air absorbs already accumulated condensation and ensures faster drying.
• Avoid humidifiers and water vaporizers on radiators if possible.
• When cooking and showering, open the windows so that the moisture can be released immediately. At the same time, keep the interior doors closed so that moisture cannot spread to other rooms.
• Do not dry laundry in the living room to not to increase the humidity.
• Particular attention should be paid to the "sources of moisture" in the room, especially in winter. This means that temporary activities such as cooking or showering, high presence in the home also increase the humidity, as well as plants or pets. So it is better to divide such sources, especially in winter.