Hi all, it’s been another week since our extreme water test.
How is the bamboo flooring faring now?
Before I share the results with you, let me just emphasise again: This is an extreme test and not representative of the usual conditions. Do this to any wood or bamboo flooring, and it will be irreparably damaged.
As you can see, 7 days after being fished out from the water tank, the test specimen has completely dried out. It has now returned to its original colour.
To the casual observer, there is little physical change to the bamboo flooring.
However, close examination reveals that the test piece is now about 0.3mm longer.
It is also very slightly convex i.e. it is higher in the middle than at the sides. Since the warping wasn’t present 7 days earlier, it must have happened during the drying process.
The explanation is simple:
Our bamboo flooring comes pre-finished with a polyurethane coating on the surface. This coating acts as a barrier and prevents water from pass through.
As a result, more moisture escapes from the bottom than from the top. As it dries out, the bottom shrinks more than the top surface.
It is this difference in shrinkage that causes the very slight convex shape now. Even though the test piece is now completely dry, it doesn’t return to its original shape nor size.
When it bulges up in the middle like this, it is called crowning.
The size expansion is known as swelling, which is usually caused by flooding.
In bamboo flooring, the crowning and swelling is hardly perceptible, a testament to its high dimensional stability. But even the strongest wood floors cannot stand abuse like this.
So to keep your bamboo floor in tiptop condition for years to come, I highly recommend that you keep you it dry and away from water.