RolandW
2011-10-26 13:21:28
- #1
Hello dear community, due to certain circumstances it is possible for me to move into a house from 1950 in need of renovation. Overall, there will be many different construction sites to work on, but I would first like to focus on the insulation work. Specifically, I would like to insulate the ceiling between the ground floor and the attic. The following information may possibly be helpful: * Ceiling composition (from bottom to top): - Plaster, straw mat, counter battens, floorboards, coke ash, floorboards * the attic will definitely not be inhabited and does not necessarily have to remain walkable * unfortunately, the spacing of the roof beams is not identical everywhere * the roof itself is not insulated at all We have already given it some thought and tend to use PUR WLS 024 boards with a thickness of 8 cm. Possible applications can be seen in the sketch. In this sketch, I have created 3 scenarios and evaluated them each based on effort (costs, cutting) and efficiency (airflow ASSUMED by me). If all of this is nonsense, please let me know and offer me suggestions for improvement. Regarding the sketch, red stands for insulation and blue for drywall or OSB board. Furthermore, we are considering the insulation of the walls. Currently, the 38 cm thick wall was only plastered. In some rooms, for the sake of later electrical installation, we have completely removed the plaster and plan to use drywall boards according to the following example (either with battens or with mounting brackets). The problem here is that an air chamber forms behind the drywall (due to the uneven wall). A friend told me that air is an excellent insulator (costs nothing and is very good with about 0.02 W/mK). Unfortunately, I lack the expert knowledge to verify this statement. On the internet, you can find indications that air has low thermal conductivity, but rarely in relation to building or insulation. So I hope you can see everything and practice your critique diligently. Many thanks in advance, Roland