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Figure 17.—Typical log-wall section, taken through window.
If standard mill work frames are used, false side jambs of sawed material, usually 2-inch planks, should be fitted in the openings to hold the logs in place. For a wall made of 10-inch logs, a plank 2 inches by 10 inches should be used for the jambs and the standard frame fitted in place between them after providing the necessary allowance for the wall logs to shrink or settle. The head casing ordinarily will cover the space allowed for shrinkage.
Some kind of insulating material which will take compression, such as crumpled newspapers, asbestos wool fiber, or rock wool, may be used to fill the space over the head allowed for settlement. Insulating material must be installed loosely, so as not to take any weight as the headlog gradually settles.
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Figure 18.—Various ways of framing eaves. Despite the fact that sawed rafters, as shown above, are often used for convenience in framing the roof, sawed or milled material is incongruous in appearance in the exterior of log buildings Hence, pole rafters, hand-made shakes, and similar hand-riven features are preferred.