Window Pan Drainage Dam Assembly for Moisture Management
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Solution Overview
Problem
Window pan areas in buildings face issues with water ingress and condensation due to inadequate drainage systems, leading to structural damage, mold, and decay, as existing systems fail to effectively redirect moisture away from the interior to the exterior building envelope.
Innovation Solution
A window pan drainage dam assembly made from lightweight PVC or other plastic materials, featuring a sloped sill strip and corner dams that channel water and condensation away from the window sill and walls, ensuring a continuous seal and proper moisture management through mechanical fastening and a self-adhesive membrane, allowing for effective drainage and air circulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional window pan drainage systems are used, then water ingress and condensation occur leading to structural damage, but the system lacks effective drainage capability to redirect moisture away from the interior
Solution Approach 1:
The drainage system is divided into multiple functional components: a sill pan with integrated drainage channel, a drainage dam with channel, and a membrane system. Each component performs a specific function in the drainage process, collectively solving the water ingress problem through segmented functionality.
Solution Approach 2:
A self-adhering membrane is introduced as an intermediary element between the drainage components and the building structure. This membrane facilitates the drainage function by providing a continuous water-resistant barrier while allowing the drainage system to effectively redirect moisture away from the interior.
2Duration of action of stationary object
If a durable rot-resistant drainage system is implemented, then structural protection is improved, but installation complexity and user-friendliness may be compromised
Solution Approach 1:
Multiple functions are merged into single components to simplify installation. The sill pan integrates a drainage channel, the drainage dam combines channel and dam functions, and the membrane provides both water resistance and adhesion. This merging reduces the number of separate installation steps while maintaining durability.
Solution Approach 2:
The self-adhering membrane provides automatic bonding to the building structure through its self-adhesive properties, eliminating the need for additional adhesives or complex fastening procedures. This self-service characteristic simplifies installation while ensuring a continuous, durable seal.
3Difficulty of detecting and measuring
If a consistent uniformly designed drainage system is used, then inspection ease is improved, but adaptability to various window configurations may be limited
Solution Approach 1:
The drainage components are designed with universal features that allow them to adapt to various window configurations. The integrated drainage channels and dams can be configured for different window types while maintaining a consistent design that facilitates easy inspection across all applications.
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 solution effectively prevents water intrusion and promotes drying of the window pan area, reducing the risk of structural damage and decay by ensuring that water and moisture are redirected to the exterior drainage plain, thus maintaining a durable and rot-resistant system.
Implementation Method 1
A window pan drainage dam assembly made from lightweight PVC or other plastic materials, featuring a sloped sill strip and corner dams that channel water and condensation away from the window sill and walls
Data Source
AI summary
A system and components for a window pan water dam system is disclosed. The object of the invention is to deflect water from the window base sill plate back towards the exterior drainage plain of the building envelope, thus ensuring water ingress does not occur through the sill pan area and the side walls of the opening.