Why Does Wood Crack Filler When it Dry?

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Wood Crack Filler – To go straight to the point, wood cracks due to differential shrinkage. Differential shrinkage occurs because the outer fibers in the shell are dry first and begin to shrink. However, the core hasn’t start to dry out and shrink, and as a result, the shell is restrain from shrinking the core. Thus the shell becomes stressed and the core becomes compress. With pressure from the shell and the core pulling in the opposite direction, the wood fiber breaks and cracks form. The bigger the wood member, the more pressure is given to the wood members.

The 1×8 board is only one inch thick so it dries pretty fast. The stress is minimal and only a little, a small surface examination can occur. Much larger 8×8 (8-inch x 8-inch) wood takes a long time to dry which can reach six months. The inside of the wood will remain wet for months while the outside is dried to below 20 percent moisture content. Stress arranged in 8×8 will eventually produce a gap of 1/2 inch or greater on one face to wood. This crack will reach the center of the wood and usually only on one face.

We have seen people cut round, “lily pad” from the end of the wood so they can use it as a cutting board in the kitchen. It looks good in green, not spicy, but after a few weeks, it develops large pie cracks on its part. This is finally discarded as unsightly. After throwing it away, they wondered what had happened to the wood that made this possible. This is just another reason why wood should be dried properly before using it in any mode other. Than for exterior use such as fence posts, landscape wood or rough fences. If they are used where their final water content will be 15% or lower. They must be dried before grinding and installed to their final use.

In this way the spices, stress cracks can be aligned in such a way that they are hidden or thrown away. Preventing Cracks – Proper drying techniques and PEG what can be done to prevent degradation of spices in wood? With wood in large quantities, boards for wood, we can only use proper drying following the many details that make up the complete process. This can be done well with a kiln or by air drying but many details must be followed to get the desired results. It is not the purpose of this short subject to describe what must be done about the correct dry wood. This will be discussed in another article.

 

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