Rake Edge Gutter With Hidden Shingle Cutting Guide
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Solution Overview
Problem
Existing roofing systems face challenges in efficiently managing moisture at the rake edge, leading to water infiltration, wind uplift, and irregular shingle edges, which can result in long-term damage and require additional products and steps for installation and maintenance.
Innovation Solution
A rake edge gutter system with a nailing flange and elevated exterior plane that doubles as a cutting guide, allowing for on-site trimming of shingles and redirecting water away from the building envelope, while securing shingles against wind uplift and hiding cut edges, is integrated into the drip edge design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If field shingles are cut to length on site at the rake edge, then the shingles can be installed to maintain manufacturer field shingle side lap requirements, but the cutting process creates irregular looking rake edges and exposes shingle edges to weather
Solution Approach 1:
The invention extracts the shingle cutting operation from the visible rake edge area by providing a guide that extends behind the rake edge. The cutting guide portion positioned behind the rake edge allows shingles to be cut to precise lengths while the irregular cut edges remain hidden from view, separating the cutting function from the aesthetic requirement.
Solution Approach 2:
The cutting guide acts as an intermediary tool that facilitates precise shingle cutting while managing the visibility of cut edges. The guide's dual-position design (extending both in front of and behind the rake edge) mediates between the need for precise cutting and the desire for clean appearance by directing cut edges to the hidden rear position.
2Reliability
If additional products and steps are used to manage moisture at the rake edge, then water infiltration and wind uplift are better prevented, but the device complexity and installation time increase
Solution Approach 1:
The invention merges multiple functions (cutting guide, moisture management, and shingle positioning) into a single integrated rake edge guide device. The guide structure combines the cutting guide portion with moisture management features, eliminating the need for separate products and reducing installation complexity while maintaining reliability.
Solution Approach 2:
The rake edge guide serves multiple functions simultaneously: it guides shingle cutting to precise lengths, manages moisture at the rake edge, positions shingles during installation, and provides a reference for consistent spacing. This multi-functionality reduces the number of separate products needed while improving overall system reliability.
3Loss of time
If field shingles are cut after installation past the starter shingle outer edge, then the cutting mark is invisible to the roofer, but the irregular cut edges further drive moisture off the gable end
Solution Approach 1:
The cutting guide is positioned and established before shingle cutting occurs, providing a pre-positioned reference that eliminates the need for measurement and marking operations. The guide's fixed position behind the rake edge allows direct cutting along the guide edge, performing the cutting action preliminarily and accurately without subsequent adjustment or marking.
Data Source
AI summary
A combination drip edge, rake flashing, gutter with nail flange that is useful for water harvesting and securing of shingles in adverse weather conditions.