Concealed screw connection for wooden decking

Conclusion: The technically best system for concealed fastening of wooden terraces. However, it is also more complex than some other solutions.

Conclusion: Relatively inexpensive system, which, however, requires more space on the substructure and is not available in stainless steel.

Conclusion: Expensive since an extra lever tool is required for around €300. Technically critical because the mandrel is pushed in laterally without pre-drilling.

Conclusion: Similar to the early plank holder with a continuous bar. Unfortunately made of plastic and not suitable for hardwood. The system with the highest installation height.

Conclusion: Almost identical to the BioMaderas Clip and technically a very good solution. Small drawback: the price and the larger gap for disassembly.

Conclusion: Clever solution, since assembly is quick and inexpensive. Unfortunately at the expense of structural wood protection, since poor ventilation and floorboards with grooves are necessary.