Logs were split in two halves, set or rammed into the earth (generally called post in ground construction) and given a roof.
Single-nave churches in Norway: Grip, Haltdalen, Undredal, Hedal, Reinli, Eidsborg, Rollag, Uvdal, Nore, Høyjord, Røldal, and Garmo.
The tall internal posts (staver) are interconnected with brackets (bueknær), and also connected to the outer walls with aisle rafters, creating a laterally rigid construction.
The oldest technique is often called palisade work and was a self-supporting wall construction with densely placed earthen pillars or planks, which enclosed a room and at the same time carried the roof.
Later, split logs were used, which gave the walls a flat inside, and the edges could be leveled or fitted with tongue and groove.
[1] By lifting the pole planks up from the ground and placing them on sleepers clamped between more powerful corner or intermediate posts, the risk of rot damage was reduced.
It has now been proven that the reused building parts originally belonged to the current church's forerunner, dendrochronologically dated to the period 1070–1080.
[4] Jørgen H. Jensenius believes that archaeological material does not provide unequivocal support for Christie's hypothesis; a change in size or transition to a stone church may also explain why excavated pillars fell out of use.
He calculated the ground plan and area for 79 churches, and the nine largest were all in Sunnmøre with Hjørundfjord, Volda, and Norddal of over 280 square metres (3,000 sq ft).
He concluded that several were originally listed as cruciform churches in stakes, including Hareid, Volda, Vatne and Ørsta.
For some other churches (Bremsnes and Kornstad on Nordmøre), contemporary sources say that the cross arms were later added to the lumber.
[4] Roar Hauglid estimated that most (80–90%) of the medieval Norwegian stave churches were simple single-nave buildings (Type A) and most were relatively small.
In written sources from the Middle Ages, there is a clear distinction between stafr (posts) and þili or vægþili (wall boards).
[17] According to Norway's oldest written laws and Old Norwegian Homily Book, the consecration of the church was valid as long as the four corner posts were standing.
[18][19] For instance, the sermon says: "The four corner posts of the church are a symbol for the four gospels, because their teachings are the strongest supports within the whole of Christianity.
(Um einskildmenn byggjer kyrkje, anten lendmann gjer det eller bonde, eller kven det er som byggjer kyrkje, skal han halda henne i stand og inkje øyda tufti.
Replica stave churches have been built in several American communities, mostly in the Upper Midwest, with Norwegian or Islandic immigrant populations.
Lorentz Dietrichson in his book De norske Stavkirker ("The Norwegian Stave Churches") (1892) claimed that the stave church is "a brilliant translation of the Romanesque basilica from stone to wood" ("En genial oversettelse fra sten til tre av den romanske basilika").
Nicolaysen wrote: "Our stave churches are now the only remaining of its kind, and according to the sparse records and known circumstances, it appears that nothing similar existed except perhaps in Britain and Ireland."
[29] Folklore and circumstantial evidence seem to suggest that stave churches were built upon old indigenous Norse worship sites, the hof.
Bugge and Norberg-Schultz accordingly claimed that "there is no reason to believe that the last hofs and the first churches had any major differences" ("og da er det liten grunn til å tro at de siste hov har skilt seg synderlig fra de første kirker").
Pope Gregory I encouraged (year 601) Augustine of Canterbury to reuse pre-Christian temples, but this had little relevance for Norway according to Nicolaysen.
Stave churches were also often located near or in the sight of large natural formations which also had a significant role in Norse Paganism, thus also suggesting a form of continuity through placement and symbolism.
[clarification needed] Owing to this evidence newer research has suggested that Christianity was introduced into Norway much earlier than was previously assumed.
Basic geometrical figures, numbers that were easy to work with, one or just a few length units and simple ratios, and perhaps proportions, were among the theoretical aids all builders inherited.
The matrix, forming ‘lines’ in space, has an expressive potential that includes the capacity to delineate proportion, direct eye-movement, suggest spatial enclosure, create patterning, permit transparency and establish continuity with landscape.
One of the exceptions is the Christian motifs found on the west portal[56] from the torn Hemsedal stave church, which shows St. Olav's martyrdom and status as a Christlike saint.
The sources of the Physiologus are Indian, Hebrew and Egyptian animal stories and various classical texts written by, among others, Aristotle and Pliny the Elder.
An important problem in dating the churches is that the solid ground sills are the construction elements most likely to have the outer parts of the log still preserved.
The program was to create positive ripple effects in the form of greater local activity with traditional ways of using materials and resources.