C-Shaped Cavity Tray Insulating Member for Thermal Continuity
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Solution Overview
Problem
Existing methods for insulating around cavity trays in cavity walls are labor-intensive, time-consuming, and often result in incomplete insulation, leading to thermal bridging, condensation, and mold growth due to the interruption of insulation continuity.
Innovation Solution
A method using a C-shaped cavity tray insulating member with a damp proof course (DPC) is introduced, where the member is placed with one arm below and one above the cavity tray, allowing for easier installation and continuous insulation, and the DPC directs moisture back to the outer leaf, simplifying the insulation process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cavity trays are installed to evacuate water from the cavity, then water drainage function is improved, but insulation continuity is interrupted causing thermal bridging
Solution Approach 1:
The insulation system is segmented into multiple components: board insulation for bulk insulation, and C-shaped cavity tray insulating members specifically positioned around the cavity trays. This segmentation allows each component to perform its specific function - the board insulation provides continuous thermal insulation while the C-shaped members address the localized gaps around cavity trays without compromising overall insulation continuity.
Solution Approach 2:
The C-shaped cavity tray insulating member acts as an intermediary element between the cavity tray and the board insulation. It fills the gap created by the cavity tray projection into the cavity, mediating between the water drainage function of the cavity tray and the insulation continuity requirement, thereby eliminating thermal bridging at the cavity tray location.
2Manufacturing precision
If traditional cutting and packing insulation around cavity trays is performed, then insulation accuracy is improved, but installation time and labor cost increase significantly
Solution Approach 1:
The C-shaped cavity tray insulating members are pre-formed and ready for installation. The preliminary shaping of these members into the correct C-configuration allows them to be directly installed around the cavity trays without requiring on-site cutting and packing operations, significantly reducing installation time while maintaining accuracy.
Solution Approach 2:
Instead of cutting insulation material to fit around cavity trays, the invention uses pre-formed C-shaped insulating members that are designed to match the required geometry. These members are essentially pre-copied into the correct shape and size, eliminating the need for time-consuming on-site cutting and packing operations.
3Productivity
If insulation is left incomplete around cavity trays to save time, then construction speed is improved, but cold bridges and condensation problems occur
Solution Approach 1:
The invention merges the cavity tray insulating member with the board insulation system. The C-shaped member is positioned with its arms extending into the cavity space and its trunk against the blockwork, creating a unified insulation system that maintains continuity around the cavity trays. This merged approach ensures both speed and effectiveness by installing a complete insulation solution in a single operation rather than requiring multiple separate steps.
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
This method reduces the complexity and time required for insulation, ensuring proper cavity wall insulation, preventing heat loss, condensation, and mold growth, while allowing for faster construction and weatherproofing.
Implementation Method 1
the DPC member having a central portion and a pair of legs protruding outwardly from the central portion in opposite directions with respect to each other and protruding substantially orthogonally with respect to the central portion
Implementation Method 2
A cavity tray insulating member for insulating around a cavity tray in a cavity wall
Data Source
Figure 1~2
Figure 3~6
Figure 7(a)~7(b)
AI summary
This invention relates to a method of insulating around a cavity tray (27) in a cavity wall, a method of constructing an insulated cavity wall, and a cavity tray insulating member for use in the methods. The cavity tray insulating member (1) comprises a substantially C-shaped channel (3) constructed from an insulating material. The C-shaped channel comprises an elongate trunk (5) and a pair of arms (7, 9) bridged by the trunk and projecting forwardly therefrom. The C-shaped cavity tray insulating member (1) is mounted on a layer of board insulation (41) below the intended level of the cavity tray (27) with one arm (9) below the intended level of the cavity tray (27) and the other arm (7) above the intended level of the cavity tray. Another layer of board insulation (43) is then mounted on the uppermost arm (7) of the C-shaped channel. Intricate cutting of the insulation material is avoided, thereby simplifying the insulation method.