Common Wallpaper Installation Mistakes and How to Avoid Them

Dec 11, 2025By Kingdom Interior LLC Interior LLC
Kingdom Interior LLC Interior LLC

Preparing the Surface

One of the most common mistakes in wallpaper installation is neglecting proper surface preparation. It's crucial to ensure that the wall is clean, smooth, and dry before applying any wallpaper. Dust, dirt, and moisture can prevent the wallpaper from adhering correctly. Always clean the wall and let it dry thoroughly before starting.

Another pitfall is ignoring imperfections such as cracks or holes. These should be filled and sanded to create a smooth surface. Skipping this step can lead to bubbles and an uneven finish once the wallpaper is applied.

wall preparation

Incorrect Measurements

Proper measurement is essential for a successful wallpaper installation. Failing to measure the wall accurately can lead to insufficient wallpaper or mismatched patterns. Always measure the height and width of your walls and account for pattern repeats to ensure a seamless look.

Consider creating a detailed plan or sketch of the room. This helps visualize how the wallpaper will align and ensures you purchase the right amount of material. Cutting corners at this stage can lead to unnecessary frustration and added costs.

Poor Adhesive Application

Applying adhesive incorrectly is a frequent mistake that can lead to peeling or bubbling. Always follow the manufacturer's instructions regarding the type and amount of adhesive to use. An even application is key to ensuring the wallpaper sticks properly.

wallpaper adhesive

It's also important to apply adhesive to the edges of the wallpaper, as these areas are prone to lifting. If you're using pre-pasted wallpaper, make sure to activate the paste adequately by soaking it according to the instructions.

Ignoring Pattern Matching

For patterned wallpaper, matching the design across strips is crucial. Misalignment can disrupt the visual flow and detract from the overall aesthetic. Take your time to align the patterns carefully, using a level or straight edge to maintain consistency.

When cutting the wallpaper, leave extra length at the top and bottom to allow for adjustments. This can help in achieving a perfect pattern match without running short.

pattern matching

Overlooking Trimming and Finishing

Once the wallpaper is up, trimming the excess at the top and bottom is a necessary step that some DIYers overlook. Use a sharp knife or blade and a straight edge to trim neatly for a professional finish.

Finally, take care of the seams. Smooth them with a seam roller to ensure they lay flat and blend seamlessly with the rest of the wallpaper. This attention to detail can make a significant difference in the final appearance.

Avoiding these common wallpaper installation mistakes requires a bit of patience and precision, but the result is well worth the effort. By preparing properly, measuring accurately, and taking your time with application, you can achieve a professional-looking finish in your home.