Building Closure Frame Moisture Drainage and Barrier Design
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Solution Overview
Problem
Building closures, such as windows and sliding doors, allow moisture to enter the building interior due to air pressure dynamics, which existing technologies fail to effectively prevent and manage.
Innovation Solution
A building closure frame with a barrier extending along the top portion and a flexible seal wall to retard moisture ingress, combined with moisture weep openings that direct moisture from the cavity into an interior chamber and out through drain openings, ensuring moisture is collected and drained to the exterior.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a barrier is added to retard moisture passage, then moisture protection is improved, but device complexity increases
Solution Approach 1:
The frame is divided into multiple functional zones: a barrier wall segment that extends from the exterior surface to retard moisture passage, weep opening segments that allow moisture egress, and a drainage path segment that channels moisture to the exterior. This segmentation allows each component to perform its specific function while collectively providing comprehensive moisture protection.
Solution Approach 2:
The barrier wall acts as an intermediary element between the cavity where moisture accumulates and the building interior. It retards moisture passage while allowing controlled egress through weep openings, mediating the moisture flow to protect the interior without completely blocking the path.
2Reliability
If weep openings are added to drain moisture, then moisture management is improved, but sealing effectiveness deteriorates
Solution Approach 1:
Different portions of the frame have different properties: the barrier wall portion has high resistance to moisture passage, while the weep opening portions have high permeability to allow moisture egress. This local differentiation of quality allows the system to simultaneously retard moisture ingress while facilitating controlled moisture drainage.
Solution Approach 2:
The moisture management system is segmented into distinct functional zones: barrier zones that retard moisture passage, weep opening zones that allow moisture egress, and drainage zones that channel moisture to the exterior. This segmentation resolves the contradiction by providing both protection and drainage functions in different locations.
3Reliability
If a barrier wall extends toward the inner periphery, then moisture barrier effectiveness is improved, but cavity ventilation is reduced
Solution Approach 1:
The barrier wall is segmented with integrated weep openings at strategic locations. This segmentation allows the barrier to extend toward the inner periphery for effective moisture retardation while incorporating controlled egress points that prevent moisture accumulation in the cavity.
Solution Approach 2:
The weep openings serve as intermediary elements within the barrier wall structure, providing controlled pathways for moisture to escape from the cavity while the overall barrier wall maintains its moisture-retarding function. This intermediary approach balances barrier effectiveness with cavity ventilation.
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
Effectively prevents moisture from entering the building interior by using a barrier and weep openings to redirect and drain moisture away from the interior, enhancing the sealing efficiency around the closure.
Implementation Method 1
A barrier extends along at least the top portion of the frame to retard passage of moisture from the cavity to the building interior
Implementation Method 2
The flexible seal wall preferably extends along top and side portions of the frame toward the inner periphery of the building wall opening
Implementation Method 3
moisture in the cavity flows through the weep opening into the chamber, within the chamber around the frame and then out of a drain opening in a bottom portion of the frame
Data Source
AI summary
A building closure for mounting within an opening in a building wall structure includes a frame for mounting within the wall structure opening and at least one closure unit for mounting within the frame. The frame has at least one interior chamber extending entirely around the frame and a nailing flange for securement to the building wall structure such that at least a portion of the frame is disposed within the building wall opening. There is a cavity between at least one exterior surface of the frame and the inner periphery of the building wall opening, with the cavity extending along at least a top portion of the frame. A barrier extends along at least the top portion of the frame to retard passage of moisture from the cavity to the building interior. At least one moisture weep opening is disposed in the top portion of the frame from the cavity to the interior chamber of the frame such that moisture in the cavity flows through the weep opening into the chamber, within the chamber around the frame and then out of a drain opening in a bottom portion of the frame.