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DIY Window Installation Troubleshooting in South Portland, ME

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Your satisfaction with your Pella windows and doors is our top priority. If you have a problem with your Pella product that you believe may be related to the window’s installation, trying the following steps may help determine if the product is installed level, square and plumb.

First, get a level and place it on the frame of the product, across the bottom or sill. Do not put it on the sashes or panels of the product because it may not give an accurate reading. The bubble of your level should fall in the center, indicating the product is installed level.

Next, examine plumb of your window or door. Plumb means the window or door is straight down or up, vertically. To examine for plumb, set your level on the two vertical side jambs on the exterior face to ensure the product is plumb from the inside out. Then, you’ll check for plumb from left to right by placing the level on each side. The bubble should fall in the middle on both sides, indicating the product is installed plumb.

When you finish checking plumb, you can examine for bowing by measuring the unit horizontally across the top, middle and bottom. The measurements of each of the three places should all be equal, allowing 1/8 inch of leeway. It’s crucial to always measure to and from a single point on both sides for consistency. Lastly, see if your window or door is square by measuring from each corner to the other in an X fashion on the outside of the product. The measurements should be within 1/8 inch of each other to indicate the product is installed square.

You could also check the reveal, where the sash meets the frame. The gap should look the same from top to bottom and left to right. Each side of your product should appear the same, indicating the product is installed level, square, and plumb.

Doing a little troubleshooting on your own can offer helpful information to solve a problem. If it turns out that you have found one, or even a couple, of these issues, visit the Pella Window and Door Showroom in South Portland or give us a call at 207-517-2331.