Decking Board Tongue-and-Groove Water Barrier
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Solution Overview
Problem
Conventional deck systems suffer from water leakage issues due to gaps between deck boards, which can lead to moisture accumulation under the deck, affecting the usability of spaces below and potentially creating habitats for insects and weeds, and expose screw heads on the surface, which is undesirable for cosmetic reasons.
Innovation Solution
The deck system features an extruded cross-section with a tongue-and-groove mating fit between boards, including a flashing element for butt joints, and optional heating elements, to prevent water infiltration and allow for thermal expansion, while also providing a secure and aesthetically pleasing solution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If deck boards are spaced apart or abutting each other, then ease of installation and thermal expansion are accommodated, but water leakage occurs between the boards
Solution Approach 1:
A flashing element is introduced as an intermediary component between adjacent deck boards. This flashing element fills the gap between boards and directs water away from the underlying structure, thereby preventing water leakage while still allowing for thermal expansion of the boards.
Solution Approach 2:
The deck board system is segmented into distinct functional components: the deck boards themselves, the flashing elements, and the underlying structure. This segmentation allows each component to perform its specific function - boards provide the walking surface and can expand/contract, while flashing elements manage water diversion independently.
2Ease of manufacture
If conventional rectangular cross-section boards are used, then ease of manufacture is maintained, but screw heads are exposed on the top surface which is undesirable for cosmetic reasons
Solution Approach 1:
The board design transitions from a conventional rectangular cross-section to a more complex cross-section that includes a recessed area. This dimensional change allows screw heads to be recessed below the top surface, improving cosmetic appearance while maintaining ease of manufacture through standard extrusion or molding processes.
3Adaptability or versatility
If gaps are left between end surfaces of deck boards, then thermal expansion and contraction are accommodated, but fluid leakage or liquid leakage under the deck occurs
Solution Approach 1:
A flashing element is positioned at the end joints of deck boards to act as an intermediary barrier. This flashing element spans the gap between boards, preventing fluid leakage while still allowing the boards to expand and contract within the gap space.
Solution Approach 2:
The flashing element is pre-installed at the end joints before the boards are fully secured. This preliminary action ensures that the water-blocking function is in place before the boards are subjected to thermal expansion and contraction forces.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system effectively prevents water from passing between deck boards, maintains the dryness under the deck, and allows for thermal expansion, while offering a secure and visually appealing connection without exposed screws.
Implementation Method 1
The board may have a heating element within it to facilitate removal of snow and ice
Implementation Method 2
there is typically a space between the end surfaces of the deck boards in order to allow for a thermal expansion and contraction of boards placed end to end
Data Source
Figure 1A
Figure 1B~1C
Figure 1D
AI summary
A decking system is made up of a variety of decking boards and other components are disclosed. In some aspects, the decking boards are connectable to each other so that adjacent boards will provide a water barrier and a drainage channel. Some versions of the boards may have a hollow region to accept the provision of heating elements or other accessory structures. A connector piece is disclosed in various embodiments span the gap between the butt ends of the boards to provide a water barrier at the butt ends of the boards. A gutter and downspout system is disclosed, as well as structures for protecting the ends or sides of the deck structure.