The True North Patented Butt Spline Assembly

	Two holes are drilled in the end of each log to create a figure 8 shape as they butt together in a wall assembly. A custom made butt spline clamp is inserted into pre-drilled clamping holes and pressure is applied to draw the joint together. An asphalt impregnated figure 8 foam pad is installed in the bottom of the figure 8 shaped holes. A two piece patented polypropylene butt spline assembly is wrapped with asphalt foam tape and then dropped into the figure 8 shaped holes. Two 10 inch common spikes are driven into the two piece butt spline assembly, wedging it apart, thus tightening the joint. This procedure is similar to attaching an axe to an axe handle with a wedge. Another asphalt impregnated figure 8 foam pad is installed on top of the butt spline assembly. Finally the butt spline clamp is removed.
	True North’s Secret The green arrows in Fig. A demonstrate the natural shrinkage in the width of the log. The log squeezes on the radius of the butt spline assembly. At the same time, shown with blue arrows, the log shrinks longitudinally pulling on the butt spline assembly making the joint progressively tighter over time. True North’s Philosophy The naturally occurring shrinkage in the width and the length of the log is used to its fullest advantage to make the log home airtight.
	*Systems shown and used by True North Log Homes Inc. are protected by patents and patents pending - U.S.A. and Canada.