5 Best Practices for Shimming Vinyl Windows (and Avoiding Costly Callbacks)

Proper shimming of vinyl windows is critical to installation quality, as callbacks from window issues can cost nearly five times the original profit. Correct shimming practices directly impact air sealing, water resistance, and long-term window performance.

Callbacks from window installation issues aren’t just inconvenient—they can cost nearly five times the original profit, with many problems traced back to small but critical steps like proper shimming. In fact, shimming has outsized impact on air, water, and long-term function, according to…

This story was originally published by JLC Online.