Traditionella och samtida bottenbj?lklag
med fokus p? isoleringsmaterialen
Floor frameInsulation materialsWood shavingsMineral wool insulationCharcoalBottenbj?lklagIsoleringsmaterialSp?nKolMineralull
The survey aims to shed light on traditional and contemporary bottom floor frames, their construction
and different insulating materials; mineral wool, wood shavings and charcoal. The purpose is to
analyze and discuss the similarities and differences as well as the pros and cons with a focus on the
construction and the different insulating materials.
The work has been limited to comparing two different wooden floor frames. The first one is based on
a real floor frame from an older building, this example is presented as the traditional floor frame in
this study and are from around 1940. The other floor frame is presented as a contemporary floor frame
and is based on wood building type descriptions and literature. Both constructions are floor frames
over an outside air ventilated crawl space.
Based on the work, some conclusions could be drawn. One of them is that it can be said that the
traditional and contemporary construction in many ways is equal, but one difference is that in the
contemporary solution, the underside of the construction is insulated to protect it. There is a bigger
difference between traditional and contemporary insulation materials. Wood shavings are a residual
product and so can probably also the charcoal be. These materials are when they are dry ready to be
laid in as insulation, and do not need any further manufacturing process. Mineral wool, on the other
hand, can be partly made from a residual product, but in addition requires a very energy-intensive
manufacturing process to become insulation. These are some conclusions that been drawn in this
work.