Roof Mount Flashing and Bracket Sealing Against Water Leakage
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Solution Overview
Problem
Existing roof mounting systems face challenges in providing a watertight seal and secure attachment for solar panels and other structures on rooftops, particularly in varying weather conditions and roof types, leading to potential leaks and instability.
Innovation Solution
A roof mount assembly that includes flashing with apertures, seals, and brackets, where a seal is positioned between the flashing and a bracket, forming a watertight seal by extending through the aperture and being compressed against the flashing, and fasteners are used to secure the bracket to the rafters, inhibiting fluid flow and providing structural support.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a seal is positioned between the flashing and bracket to form a watertight seal, then water leakage is prevented, but the device complexity increases
Solution Approach 1:
The seal is integrated within the flashing assembly, nested between the flashing and bracket components. This nesting approach allows the seal to be part of the overall mounting system without requiring separate installation steps, thereby improving watertightness while minimizing the increase in device complexity
Solution Approach 2:
The seal acts as an intermediary element between the flashing and bracket, creating a watertight barrier at the interface where water infiltration would otherwise occur. This intermediary component resolves the contradiction by providing reliable sealing without fundamentally changing the overall system architecture
2Stability of the object's composition
If fasteners are used to secure the bracket to the rafters, then structural stability is improved, but the risk of fluid leakage through apertures increases
Solution Approach 1:
The sealing function is extracted from the fastener-aperture interface and relocated to the seal positioned between the flashing and bracket. By removing the sealing requirement from the fastener penetration path and placing it at the flashing-bracket interface, the system achieves both structural stability through fasteners and fluid leakage prevention through the seal
Solution Approach 2:
The seal serves as an intermediary that blocks fluid pathways at the flashing-bracket interface, compensating for the potential leakage routes created by fastener penetrations through the flashing. This intermediary element allows the fasteners to provide structural stability without compromising the overall watertightness of the assembly
3Reliability
If the seal is compressed against the flashing to inhibit fluid flow, then the watertight seal is enhanced, but the stress on the seal and surrounding components increases
Solution Approach 1:
The compression force is localized to specific regions where the seal contacts the flashing and bracket, rather than being uniformly distributed. This local quality approach allows the seal to achieve effective watertight sealing at critical interfaces while minimizing overall stress on the seal and surrounding components
Solution Approach 2:
The flashing and bracket structures are designed to provide a cushioning effect that distributes and limits the compression force applied to the seal. This beforehand cushioning prevents excessive stress concentration on the seal while maintaining sufficient compression for watertight sealing under various weather conditions
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 solution effectively prevents water leakage and ensures secure attachment of solar panels and other structures, maintaining integrity across different roof types and weather conditions.
Implementation Method 1
a seal including a first portion positionable between the first surface of the flashing and the bracket and a second portion positionable to extend through the aperture and between the flashing and the fastener, the seal forming a water-tight seal to inhibit flow of fluid through the aperture
Data Source
AI summary
A mount assembly is provided for mounting a structure to a roof having a top surface. The mount includes a flashing including an aperture; a bracket including a first portion and a second portion, the first portion having an opening and a countersink extending around the opening, the second portion extending at an angle away from the flashing, the second portion including a slot configured to be coupled to the structure; a fastener extending through the aperture and through the opening of the bracket; and a seal extending around the aperture and positioned between the flashing and the first portion of the bracket, the seal engaging the countersink of the bracket and being compressed against the flashing.