Facade Insulation System with Density-Graded Layers
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Solution Overview
Problem
Existing insulation systems for building façades face challenges in achieving low total installed costs with good thermal insulating characteristics, requiring high labor and material costs due to the need for thick insulation boards and expensive mechanical fasteners, especially during refurbishment and renovation of old substrates like loose mortar.
Innovation Solution
An adjustable insulation system with a three-layered structure, where the first layer has a low bulk density for flexibility, the second layer provides good insulation characteristics, and the third layer has high bulk density for durability and adhesion, using a fastener with a shaft that partially erects into the first layer to stabilize and level the insulation element, reducing the need for additional leveling and fasteners.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If thick insulation boards are used to achieve sufficient thermal resistance, then thermal insulation performance is improved, but weight increases requiring more mechanical fasteners
Solution Approach 1:
The insulation board is divided into two distinct layers with different bulk densities: a first layer with lower bulk density (30-80 kg/m³) that provides flexibility and compensation for substrate irregularities, and a second layer with higher bulk density (180-280 kg/m³) that provides the main thermal insulation. This segmentation allows each layer to perform its specific function optimally while reducing the total thickness and weight required compared to using a single uniform high-density board.
Solution Approach 2:
Different regions of the insulation system are assigned different material properties: the first layer near the substrate has low density for adaptability to irregular surfaces, while the second layer at the exterior has high density for maximum thermal resistance. This local differentiation of material properties optimizes both thermal performance and mechanical adaptability without requiring increased overall thickness.
2Reliability
If more mechanical fasteners are used to secure heavy insulation boards, then fixing reliability is improved, but material costs and labor costs increase
Solution Approach 1:
The first layer of the insulation board is designed with dynamic flexibility to adapt to substrate irregularities, while the second layer provides static structural stability. The mechanical fasteners are strategically positioned to secure the heavy second layer, while the flexible first layer naturally conforms to the substrate, reducing the need for extensive fastening in irregular areas.
Solution Approach 2:
The bulk density parameter is varied across different layers of the insulation board, creating a gradient from low density at the substrate interface to high density at the exterior. This parameter change optimizes the weight distribution and mechanical properties, allowing for reduced fastener quantity while maintaining securing reliability.
3Strength
If special fasteners with increased load capacity are used, then weight bearing capability is improved, but cost increases due to expensive materials like metal
Solution Approach 1:
The insulation board is segmented into layers that distribute the load differently. The heavy second layer provides the primary weight-bearing function through its high bulk density and rigid structure, while the lighter first layer provides flexibility. This segmentation allows the use of less expensive, lighter fasteners compared to using special heavy-duty fasteners throughout the entire system.
Solution Approach 2:
The insulation board uses composite construction with two different material densities combined in one system. The high bulk density second layer (180-280 kg/m³) made of rigid insulating material provides the necessary structural strength and weight-bearing capability, while the low bulk density first layer (30-80 kg/m³) provides flexibility and substrate adaptation, creating a composite system that reduces fastener requirements.
4Adaptability or versatility
If the first layer has low bulk density for flexibility and compensation, then adaptability to irregular surfaces is improved, but structural stability decreases
Solution Approach 1:
The insulation board is segmented into two functional layers: the first layer with low bulk density (30-80 kg/m³) provides flexibility and adaptability to substrate irregularities, while the second layer with high bulk density (180-280 kg/m³) provides the rigid structural stability and thermal insulation. This segmentation allows each layer to perform its specific function without compromising the other.
Solution Approach 2:
The system uses composite materials with different bulk densities combined in a layered structure. The soft, flexible first layer adapts to irregular surfaces while the rigid, high-density second layer provides structural stability and thermal resistance. This composite construction achieves both adaptability and stability simultaneously through material differentiation.
Data Source
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AI summary
This invention relates to an improved insulation system for covering a facade of a building consisting of at least one insulation element (3), at least one mechanical fastener (4), which fastener fixes the insulation element (3) to the facade (2) of the building, whereby the insulation element has at least a first (8) and a second layer (9), the first layer (8) being directed to the facade (2) having a bulk density being lower than the bulk density of the second layer (9), whereby at least one layer is made of mineral fibres, especially stone wool fibres and a binding agent and whereby the fastener (2) has a shaft (11) erecting through the insulation element (3) into the building and a plug-plate (12) being arranged on or in the outer surface (35) of the insulation element (3). To achieve an insulation system which has very good insulation characteristics, which can be produced for low costs and which can be fixed to the facade of a building without causing high labour costs the shaft (11) if the fastener (4) partly erects into the first layer (8) of the insulation element (3) in a direction parallel to the surface of the facade (2).