Cement Board Window Frames for Moisture Resistance
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Solution Overview
Problem
Existing window frames lack durability, maintenance-friendliness, and cost-effectiveness, particularly in using cementitious materials for exterior surfaces, which are desirable for their waterproofing, paintability, and aesthetic properties.
Innovation Solution
A window device with a cement board frame material, such as Hardie Weatherboard, comprising an interior section and an exterior section secured with adhesives or fasteners, providing a durable, paintable, and moisture-resistant surface that is non-combustible and environmentally friendly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional window frame materials (wood, vinyl, aluminum) are used, then initial cost and manufacturing simplicity are maintained, but durability, maintenance requirements, and resistance to moisture/pests deteriorate
Solution Approach 1:
The patent applies composite materials by combining cement board (exterior section) with traditional window frame materials (interior section) to create a hybrid structure. The cement board provides durability, moisture resistance, and pest resistance, while the interior section maintains manufacturability and aesthetic properties. This composite approach resolves the contradiction by integrating materials with complementary strengths.
2Ease of repair
If cementitious materials are used for window frames, then maintenance requirements and paintability are improved, but initial material cost and manufacturing complexity increase
Solution Approach 1:
The patent segments the window frame into two distinct sections: an exterior section made of cement board and an interior section made of traditional materials. This segmentation allows each section to be optimized independently - the exterior section provides maintenance-free, paintable surface, while the interior section maintains ease of manufacture and cost-effectiveness. The sections are joined using adhesives or mechanical fasteners.
3Object-affected harmful factors
If cement board is used as exterior section, then waterproofing and aesthetic properties are improved, but weight and manufacturing complexity increase
Solution Approach 1:
The patent applies local quality by using cement board specifically for the exterior section where waterproofing and aesthetic properties are most critical, while using lighter traditional materials for the interior section where these properties are less demanding. This localized application of material properties optimizes the overall performance-to-weight ratio by concentrating heavy, high-performance material only where needed.
Data Source
AI summary
A window device with a cementitious board as a frame material the device being a single or double window apparatus with an exterior configured with a cementitious board or structure and configured with such frames that are easily formed and readily adaptable to substantially any size or shape opening. The cementitious board window allows for a low maintenance, paintable or pre-painted panels that are moisture and rot resistant, are not susceptible to pest, and provide a surface which is durable over time, is non-combustible, and has materials with little environmental impact. The device is used with new or replacement windows for a commercial or residential structure.