Replacement Window Cladding System Maintaining Egress and Glass Size
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Solution Overview
Problem
Current methods for replacing windows often result in a double frame, reducing vision glass size, not allowing for insulation between the window frame and stud opening, and altering the original window's appearance, while also potentially disturbing interior lead paint and not meeting egress size requirements.
Innovation Solution
A window replacement system where a new exterior window unit is installed as a single unit over the old frame, using a clad frame with built-in sashes and counterbalances, secured directly to the old frame, allowing for insulation and maintaining the original frame's integrity, with cladding options like aluminum, vinyl, or fiberglass.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a new window unit with its own frame is inserted inside the original frame, then the window can be replaced with a new unit, but it creates a double frame that reduces vision glass size by up to five inches
Solution Approach 1:
The new window assembly is nested within the original window frame opening, with the new frame positioned inside the original frame's sash pocket. This nesting approach allows the new window to be installed without creating a double frame, as the new frame utilizes the existing frame structure as its outer boundary, thereby maximizing vision glass area while ensuring proper installation and sealing.
2Reliability
If a new window unit with its own frame is inserted inside the original frame, then the window can be replaced, but the egress size may be reduced below minimum size requirements
Solution Approach 1:
The new window assembly is nested within the original window frame opening, with the new frame positioned inside the original frame's sash pocket. This nesting approach ensures that the egress opening size is determined by the original frame dimensions rather than being reduced by an additional external frame, thereby maintaining compliance with minimum egress size requirements while enabling window replacement.
3Reliability
If a new window unit with its own frame is inserted inside the original frame, then the window can be replaced, but the overall appearance of the original window is changed
Solution Approach 1:
The new window assembly is nested within the original window frame opening, with the new frame positioned inside the original frame's sash pocket. This nesting approach preserves the original window's external appearance and architectural character, as the original frame remains the visible outer structure, while the new window unit is contained within, maintaining the original aesthetic while providing functional replacement.
4Reliability
If current replacement methods are used, then the window can be replaced, but insulation cannot be installed between the window frame and the stud opening gap
Solution Approach 1:
Insulation material is installed in the gap between the new window frame and the stud opening before the final sealing and finishing steps are completed. This preliminary installation of insulation ensures that the energy efficiency improvement is achieved while the window replacement is in progress, allowing the insulation to be properly positioned and secured before the window assembly is fully closed and sealed.
Data Source
AI summary
A window unit and replacement window cladding method and system which is provided as a single unit to be installed as a complete new window that fits over the head jamb, side jamb and sill of an existing window frame and the old window frame that is cladded with head jamb, side jamb, and sill cover assemblies defining an opening in which one or more sash units is pivotally secured forming a replacement window unit, without any loss of glass size and egress, and without disturbing the building interior, and further including a clip arrangement for securing the head and side jamb assembly to the front surface of the old window frame.