How to Spot a Bad Window Installation in 60 Seconds

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Wondering if your home's new windows were put in correctly? In this video, we show you how to spot a bad window installation in less than a minute. Poorly installed windows can cause major issues down the road, from drafts and energy loss to stubborn frames that refuse to slide smoothly.

If you are looking for home improvement tips, DIY home repair advice, or trying to figure out why your sliding windows are sticking, we break down exactly what to look for—including why missing shims are the number one culprit behind sagging vinyl window frames. Don't let a bad contractor ruin your investment!