Modular Soffit Frame Thermal Bridge Reduction

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Solution Overview

Problem

Conventional window reveal systems lack a unified, uninterrupted frame, leading to thermal bridges and design limitations, with existing solutions often resulting in protrusions from the facade and inefficient load distribution.

Innovation Solution

A modular soffit frame system composed of heat-insulating reveal elements and cladding elements, featuring a two-layer structure with inner reveal elements and outer cover elements, allowing for flexible design and reduced thermal bridges through the use of rigid foam materials and adjustable assembly elements.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If sheet metal elements or aluminum profiles are used for reveal cladding, then the frame can be attached to the window frame and line the existing reveal, but thermal bridges are created and design freedom is limited

Engineering Contradiction:
Improveease of manufactureVSAvoidthermal bridges
Core Design Contradiction:
Ease of manufactureVSLoss of energy

Solution Approach 1:

The patent introduces an intermediary mounting element consisting of a mounting plate and mounting bracket that separates the reveal frame from the window frame and wall. This intermediary structure allows the reveal frame to be mounted independently, eliminating direct thermal contact between metal components and the window frame/wall, thereby reducing thermal bridges while maintaining ease of manufacture through standardized mounting hardware

Inventive Principle:
Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent employs composite construction by combining different materials with complementary properties: the reveal frame uses a composite structure integrating mounting elements with thermal insulation properties, creating a multi-material system that simultaneously achieves ease of manufacture through modular components and reduced thermal bridges through material composition

Inventive Principle:
Principle #40Composite materials

2Strength

If metal mounting brackets are screwed to the masonry, then the frame can be securely attached to the wall, but thermal bridges are created

Engineering Contradiction:
Improveattachment strengthVSAvoidthermal bridges
Core Design Contradiction:
StrengthVSLoss of energy

Solution Approach 1:

The mounting element acts as a thermal break intermediary between the metal mounting bracket and the masonry wall. The mounting plate and bracket structure creates a separation that prevents direct thermal conduction paths through the metal-to-masonry connection, maintaining attachment strength while eliminating thermal bridges at the mounting interface

Inventive Principle:
Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent extracts the thermal insulation function from the traditional metal mounting bracket by introducing a separate mounting element structure that incorporates thermal break properties. This extraction allows the metal bracket to provide mechanical strength while the mounting element provides thermal insulation, separating these functions to eliminate thermal bridges

Inventive Principle:
Principle #2Taking out (Extraction)

3Adaptability or versatility

If the frame projects far beyond the facade, then design freedom increases, but the structure becomes more complex

Engineering Contradiction:
Improvedesign freedomVSAvoidstructural complexity
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent segments the reveal frame system into modular components: reveal elements, mounting elements, and cladding elements that can be independently manufactured and assembled. This segmentation allows the frame to be configured in various projections and geometries beyond the facade while keeping each individual component simple, thereby increasing design freedom without proportionally increasing overall structural complexity

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The mounting element incorporates adjustable and flexible characteristics that allow the reveal frame to adapt to different projection distances and angular configurations. The mounting bracket and plate structure provides dynamic adjustment capability, enabling the frame to project far beyond the facade while maintaining structural integrity through flexible connection mechanisms

Inventive Principle:
Principle #15Dynamics

4Loss of energy

If a unified continuous frame is implemented, then thermal insulation is improved, but manufacturing and installation become more difficult

Engineering Contradiction:
Improvethermal insulationVSAvoidsystem complexity
Core Design Contradiction:
Loss of energyVSDevice complexity

Solution Approach 1:

The patent divides the continuous reveal frame into discrete modular reveal elements that can be manufactured separately and then assembled together. Each element can be optimally manufactured as a standalone component, and the modular assembly creates the unified continuous frame effect, thereby achieving good thermal insulation while simplifying manufacturing and installation through standardization

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The patent merges multiple functional components into the mounting element structure, which combines mechanical attachment, thermal insulation, and structural support functions. This merging creates a unified system that achieves continuous thermal insulation through the integrated mounting elements while reducing overall system complexity by combining multiple functions into single components

Inventive Principle:
Principle #5Merging (Combining)

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 provides enhanced thermal insulation, reduces thermal bridges, and increases design freedom by allowing the frame to project beyond the facade while ensuring efficient load distribution and improved rainwater runoff, thus addressing the limitations of existing window reveal systems.

Implementation Method 1

The reveal elements preferably consist of heat-insulating material, in particular rigid foam, so that thermal bridges in the area of the reveals are advantageously reduced.

Methodology Applied
Scientific EffectThermal insulation: Thermal Insulation

Data Source

PatentEP4092238A1System for building a soffit frame
Publication Date: 2022.11.23 LOTTMANN HLDG GMBH
  • EP4092238A1 patent drawingFigure 1
  • EP4092238A1 patent drawingFigure 2~4
  • EP4092238A1 patent drawingFigure 5~6

AI summary

The invention relates to a system for erecting a clad jamb frame (1) as a frame for a building opening which may project from the outer wall of the building, wherein the system comprises four jamb elements (2, 3, 4), mounting elements (5) and at least four cladding elements, wherein at least two mounting elements (5) are attached or attachable along the longitudinal extent of each jamb element (2, 3, 4) and wherein at least one cladding element is provided for each jamb element (2, 3, 4).