Vinterträdgårdar ur ett byggperspektiv
En undersökning om byggandet av vinterträdgårdar
The purpose of this of this essay is to explore the construction of a conservatory that is livable allyear around. When you build a conservatory there are several factors that need to be regardedthat usually are of no importance when you build a regular conservatory. The glassed facadeneeds to have a very good U-value and all the parts of the facade need to be isolated and theconstruction needs to prevent thermal bridges.In this essay we will start by looking at the shape of the conservatory. Due to the façade consistsof glass the conservatory will need to have a good ratio between the area and the façade so thatthe heat losses will be at a minimum. However, due to the fact that one of the sides of the façadeis connected to the warm house, you quickly realize that the shape of the conservatory is of noimportance.There are two common ways to build a foundation for a conservatory, a molded concretefoundation and isolated wooden beams. The molded concrete foundation is usuallyrecommended but if you have a difference in heights on the ground the wooden beams are agood solution. The frame of the conservatory usually consists of gluelam; however there aresome exceptions where the frame consists of aluminum. It is very common for the roof of aconservatory to consist of polycarbonate which is a very good at isolating while the price is stillrelatively low. Depending on how much time of the year you want to spend in the conservatorythe thickness of the polycarbonate while differ. It is recommended that the minimum thicknessof the roof of a conservatory that is to be used all year round should be 32 mm.The price of the conservatory varies greatly depending on how much time of the year you wantto use it. A regular conservatory can cost around 33 000 SEK for an area of 10,5 m2while thesame conservatory would cost up to 127 000 SEK. The difference in price arises due to the factthat the demands on a conservatory are higher it is to be used all year round. While a regularconservatory might have a U-value of 6,7 W/(m2*K) the U-value of an all year roundconservatory is 1,1 W/(m2*K). The biggest increase in price comes when you go from an almostall year round conservatory to an all year round conservatory. The U-value decreases with 31 %while the price increases with 152 %. This is probably due to the complex process of preventingthermal bridges by installing plastic between the aluminum profiles.In today?s market there are three different categoriesof facades: sliding facades, folding facadesand fixed parties. Even within the different categories there are different facades, they varydepending on how many glasses they consist of. These differentiate in price, this price differenceis directly correlated to how much of the facade that you can open. The more you can open, themore expensive the price is.Also, we examine two different ways of heating the room, stoves and floor heating. Floor heatingis a popular alternative for all year round conservatories because they usually have a moldedconcrete foundation. It is rather difficult to install floor heating in isolated wooden beams.That is why we examine another alternative, stove that run on ethanol. Apart from the heat theyalso add an esthetic appeal.At the end of the essay we will design our own conservatory that is adapted to the house. Thefinal price for the all year round conservatory lands at a whopping 313 300 SEK.