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How to Deal with Cracks in Composite Deck Planks

There may have been gaps in composite deck planks in some people's rooms. So what are the reasons for the cracks in the composite timber decking? What are the treatment methods?

There may have been gaps in composite deck planks in some people's rooms. So what are the reasons for the cracks in the composite timber decking? What are the treatment methods?


1. What are the reasons for cracks in composite timber decking?


  • Unilateral expansion caused by ventilation at the connection of the moisture-proof layer.


When installing the composite timber decking, the connection of the moisture-proof layer is not tightly adhered with the waterproof tape. One side of the floor is above the moisture-proof layer and the other side is the connection of the moisture-proof layer. Moisture intrusion causes the side of the floor to be longer. The length is not equal so that the end of the floor appears a triangular seam. The features are as following:


(1) There is no triangle seam after the floor is installed, which occurs after a period of use.


(2) The moisture content of the two sides of the floor slats are not consistent and the deviation is generally more than 2%.


(3) After the floor is disassembled, moisture-proof layer is not tightly adhered with the waterproof tape.


  • Improper humidity control


When the indoor is kept empty for a long time, the humidity is not adjusted in time, which will cause the floor to shrink and cause cracking or arching.


  • Improper installation


In the installation of composite deck planks, the uneven force may cause the floor to produce triangular gaps. But the triangular gaps and side gaps can be eliminated by tightening in the specified direction.


2. How to deal with cracks in composite timber decking?


In the installation of composite floor, due to uneven force during installation, the composite floor has a triangular gap. Tightening the composite deck planks on both sides of the gap can eliminate the triangular gap and the side gap. If the room is unoccupied for a long time, you can put a basin of water indoors to adjust the indoor humidity, and the gap will disappear consequently.


  • If the gap of the composite floor is large, glass glue can be filled in the gap. But if the gap is not more than 5mm, it is best to use bakelite powder. After mixing the bakelite powder, fill in the cracks and leave it overnight.


  • The water-based transparent putty is environmentally-friendly and you do not have to worry about color difference. We can use water-based transparent putty and sawdust for filling. You can also fill it in with a thinner wooden strip, and then repair it with water-based putty and sawdust so that it will not affect the aesthetics of the interior structure.


  • You can go to the hardware store to buy a wood floor joint filler, which is helpful.


  • Because the large crack of the composite floor does not affect daily use, it can be ignored and not treated. When it is hot, the composite floor will expand, and the floor with a bigger crack will not be squeezed out of shape. In the heating period in winter, you can wipe it with a semi-dry rag to keep the humidity so that the gap becomes smaller in summer, and then use solid wax to maintain it again, and then there will be no such big gap in winter.

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