In some stills from the video we see the wall panels being laid out on the large "tables" and filled with what appears to be a very dense fiberglass batt insulation, not like the fluffy stuff we have in the US. In the clip you can see the insulation material being cut on a special table with a rolling blade.
In this part of the film the company executive is explaining the construction of their wall panels. What we see here is a stud wall which looks to be closer to our 2x8 size than our 2x6s. That 2x8 stud wall is filled with the dense insulation, and then there is a second insulation layer on the outside of the wall, adding another 3" or so of what looks to be a rigid fiberglass panel. And finally on the outside of this is a heavy tongue and groove siding panel.
Its clear that the Swedes are achieving some very high performance houses using this construction. No SIPs, nothing unfamiliar to any US carpenter. They are just stepping it up. Up to 2x8 thick walls, filled with high density insulation. They are adding a second continuous insulations layer outside of that to fight the thermal bridging of the studs, and finishing it with a substantial and long lasting siding panel. This is something we could be doing here today.
Lapponia no longer has the factory video posted to their site, but their online catalog is here: Lapponia
Links to past entries in the Letters from Sweden Series:
Letters from Sweden - automation in the factory
Letters from Sweden - the foundation
Letters from Sweden - deliver and set
Letters from Sweden - plumbing the prefab
Letters from Sweden - wiring zen
Letters from Sweden - a windows tale
Letters from Sweden - panel building in Sweden vs the USA
Letters from Sweden - Europe is different, Sweden is not, sort of..
Letters from Sweden - land of modern, land of prefab
Letters from Sweden - conversations with an expatriate builder
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