Scandinavian Full-Scribe Log Building

Where it comes from

Finnish and Swedish settlers introduced horizontal log building to North America in the colony of New Sweden in 1638, and later waves of Scandinavian and Finnish immigrants brought their techniques to the Upper Midwest ¹. Their hallmark was round or hewn logs fitted so tightly they needed little or no chinking - unlike most American log houses, which were chinked and daubed ¹.

Full scribing is the modern refinement: each log is traced to the exact shape of the log below and grooved to match. Robert Wood Chambers’s Log Construction Manual lays out the whole process for round-log homes, from sill logs to log roof systems ².

Logs

• Species: straight, slow-tapering conifers - pine, spruce, fir, cedar, larch.
• Cut in winter, when sap is down; peel the bark promptly (drawknife or spud) to stop beetles and staining.
• Size: typically 10-14 inches at the small end for a house; even taper matters more than size.
• Sort logs by length and diameter before starting; Chambers’s log-selection rules choose each next log so the wall stays level and the courses balance ².

Sill logs and alternating

1. Lay the sill logs on the foundation, flattened on the bottom, with ends locked at the corners.
2. Alternate butts and tops - the thick end of one log over the thin end of the one below - so each course stays roughly level.
3. Each course crosses the one below at the corners, rising half a log per wall.

Scribing

1. Rough-notch the next log at the corners and set it on the wall, temporarily, above its final position.
2. Set the scriber - a divider with level bubbles - to the largest gap between the two logs.
3. Run one point along the lower log while the other marks the upper log, on both sides along the full length and around the corner notches, keeping the scriber level.
4. Roll the upper log over and cut to the lines.

The long groove and notches

• Cut the long groove along the underside with a chainsaw, slick, and gouge (or traditionally axe and groove ax), slightly hollow in the middle so only the scribed edges bear - that’s what makes a tight visible seam.
• Cut the corner notches - usually a round or saddle notch - to their scribe lines; Chambers describes compression-fit saddle notches and underscribing that tighten as the logs settle ².
• Lay insulation in the groove - traditionally moss, now wool or foam gasket - and set the log down on the wall.

Settling

Green logs shrink across the grain as they dry, so a full-scribe wall settles several inches over the first years. Plan for it:

• Window and door bucks in slotted keyways with a settling gap above.
• Adjustable posts under beams, and slip joints on stairs and partitions.
• Plumbing and wiring routed to tolerate movement.

What to take from this

Finnish and Swedish settlers brought tight-fitting log building to North America, and full scribing refines it: alternate butts and tops, scribe each log to the one below with a level scriber, cut a slightly hollow long groove and notches to the line, insulate the groove, and design every opening and post for several inches of settling.