|The continuous shrink–swell of wood can cause some issues. When it’s wet, the moisture in the air is absorbed by those drinking straws or wood fibers and the wood swells. Most often, the swelling occurs across the width. In fact, this swelling has enough force to pull joints apart. The worst is that if the wood is joined improperly, it can cause cracks or splits in the wood.|
|When it’s not so humid, moisture is released wood fibers and as a result, the wood shrinks. Most often, the shrinking occurs across the width of the board. In fact, this shrinking has enough force to pull joints apart. The worst is that if the wood is joined improperly, it can cause cracks or splits in the wood.
How to Keep Wood from Splitting
✅ Choosing a suitable wood is a right beginning of a successful project. Tight-grained kinds of hard wood that are seasoned or kiln-dried split not so often in comparison to green woods or softwoods.
✅ Cut the wood so that the grain runs its longest direction along all length of your project, rather than working the wood diagonally or across the grain.
✅ Seal the wood with linseed oil (preferably with boiled linseed oil) or sanding sealer asap after you are done with shaping the work.
✅ Use an exterior sealer for lumber used in building handrails, decks, or any other outdoor building products to reduce expansion and contraction during rain or sunny weather changes.
✅ Reduce exposure to direct sunlight, because rapid drying can cause the splitting of the wood if possible.
✅ Consider using knotty or burl woods since the gnarly, uneven or crooked grains are not as prone to cracking as are straight grains.
Reference article: https://www.wikihow.com/Stop-Wood-from-Splitting
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