Roof Window Sealing Assembly for Low-Profile Weather Protection
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Solution Overview
Problem
Existing roof windows, particularly those used in conservation areas, face challenges in providing adequate weather protection, thermal efficiency, and environmental sustainability while maintaining a low profile and matching traditional aesthetics.
Innovation Solution
A roof window design featuring an exterior sealing plane with interface elements and an interior sealing plane, including interface units with different functional sections, such as interface elements with base portions, inner and outer legs, flanges, and sealing portions, to enhance weather-shielding and flexibility, along with a pane sealing to improve tightness against weathering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple sealing planes are introduced to improve weather protection, then weather-tightness is improved, but device complexity increases
Solution Approach 1:
The sealing assembly is divided into three distinct sealing planes (exterior, intermediate, and interior), each performing a specific sealing function. This segmentation allows the system to achieve comprehensive weather protection through multiple specialized sealing barriers rather than a single complex seal, resolving the contradiction by breaking down the complex sealing requirement into manageable segments.
Solution Approach 2:
The intermediate sealing plane acts as an intermediary between the exterior and interior sealing planes, providing additional protection against weather infiltration. This intermediate layer mediates the transition from exterior to interior sealing, creating a graduated defense system that improves overall weather-tightness while distributing the sealing function across multiple components.
2Reliability
If interface elements with multiple functional sections are used to enhance sealing, then weather-shielding is improved, but manufacturing complexity increases
Solution Approach 1:
The interface elements combine multiple functional sections (sealing portions, anchoring portions, and connection portions) into single integrated components. This merging of functions within each interface element allows the system to achieve comprehensive weather-shielding through coordinated action of multi-functional components, reducing the number of separate parts needed while maintaining high sealing performance.
Solution Approach 2:
Each interface element is designed with multi-functionality, serving as anchor, seal, and connection component simultaneously. This universality allows a single component type to perform multiple sealing and structural functions across different locations in the roof window assembly, improving weather-shielding while standardizing manufacturing processes.
3Shape
If traditional cast iron construction with single glass panes is used to maintain aesthetic appearance, then traditional look is preserved, but thermal efficiency deteriorates
Solution Approach 1:
The roof window employs composite construction combining traditional cast iron frame elements with modern insulating materials and multi-pane glass assemblies. This composite approach allows the exterior to maintain the traditional cast iron aesthetic while the interior structure incorporates thermal insulation layers and efficient glazing systems, resolving the contradiction between traditional appearance and modern thermal performance.
Solution Approach 2:
The design copies the traditional cast iron aesthetic and proportions of historic roof windows while substituting the interior structure with modern thermally efficient materials. The exterior form replicates traditional styles to preserve historical appearance, while the interior construction uses contemporary insulation technologies to achieve high thermal efficiency.
4Length of stationary object
If low profile installation is implemented to match flat roofing, then aesthetic integration is improved, but weather protection capability deteriorates
Solution Approach 1:
The sealing system transitions from relying on vertical profile height to achieving weather protection through horizontal sealing planes and interface elements that extend along the junction between roof and window frame. This dimensional shift allows the low-profile window to maintain adequate weather protection by distributing sealing functions across multiple planes rather than relying on vertical clearance.
Solution Approach 2:
The sealing assembly incorporates flexible sealing portions and membrane-like interface elements that can adapt to the low-profile configuration while maintaining effective weather barriers. These flexible components conform to the reduced profile height while preserving sealing integrity, allowing the window to achieve both low aesthetic profile and reliable weather protection.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
In the roof window (1), a sealing assembly provides sealing between the sash (3) and frame (2) in an exterior sealing plane, an intermediate sealing plane and an interior sealing plane. An interface element (81) provides the exterior sealing plane at the top and sides of the roof window (1). The top interface element (81) comprises a first additional outer sealing lip (894) and a second additional outer sealing lip (895).