FAQ: What Are the Advantages and Disadvantages of Retrofit Window Installation?
Q: What are the advantages of retrofit installation?
1. Cost-Effective
Retrofit installation is typically more affordable than brick-to-brick or full-frame installation methods.
2. No Interior Work Required
The original interior casing and ledge (jamb extension) remain intact, eliminating the need for interior trim replacement.
3. Shutters and Blinds Can Usually Be Reused
In most cases, existing shutters or blinds will still fit.
Note: The depth of the window ledge must be checked to ensure the shutters can be reinstalled properly between the jambs.
Q: What are the disadvantages of retrofit installation?
1. Hidden Structural Issues May Go Undetected
Rotten or water-damaged studs behind the frame are not exposed during retrofit, making it difficult to assess or repair underlying problems.
2. No Additional Insulation
Because the wall cavity remains untouched, adding new insulation between the studs and the window frame is not possible.
3. Smaller Window Size
The new window is installed within the old frame, which slightly reduces the glass area and visible light.
4. Bulkier Exterior Look
The combination of the original brickmould and the new window frame—both wrapped in aluminum—results in a thicker, more pronounced exterior profile compared to other installation types.
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