Wallpaper and Wall Mural Installation Guide

Wallpaper and wall murals installation with overlap technique gives a clean on all types of materials.Including non-woven, vinyl, peel-and-stick, and commercial substrates. As XWALLX, we suggest this method for DIY fans and contractors. It helps make perfect walls that last long and look great.

Tools & Materials Needed

  1. Wallpaper or wall mural panels (cut slightly longer and wider than wall height and width)
  2. High-quality adhesive (unless using self-adhesive peel-and-stick)
  3. Measuring tape and spirit level
  4. Pencil for marking guidelines
  5. Smoothing tool or squeegee
  6. Straight edge or steel ruler
  7. Sharp utility knife with new blades
  8. Clean, damp cloth or baby wipes
  9. Drop cloth for floor protection

Preparation

1. Prep Walls: Start with a smooth, clean, dry wall. Fill holes, sand rough spots, and wipe away
dust. Let new paint cure for 3-4 weeks before wallpapering.

2. Mark Guidelines: Use a spirit level and pencil to draw a vertical plumb line for the first panel.
Measure and mark where each panel will go, accounting for recommended overlap widths.

Step-by-Step Installation – Overlap & Double Cut Method

1. Apply Adhesive (For Non-Adhesive Wallpaper/Murals)

Spread paste evenly across the area slightly wider than your first panel’s width. For peel-and-stick, skip this step and peel the backing to expose the adhesive.

2. Hang the First Panel

Align the first panel with your vertical guideline. Distribute the total 2 in (approximately 5 cm) height allowance between the top and bottom, leaving approximately 1 in (2.5 cm) at each when centered. Check that the panel covers the full wall height before trimming. Smooth from the center outward to remove air bubbles.

3. Hang the Second Panel with Overlap

Apply adhesive as required for your material, or peel back the backing for self-adhesive panels. Position the second panel so the duplicated artwork matches the first, creating the supplied 2 in (approximately 5 cm) overlap along the vertical seam. This panel seam margin is included during production and is separate from the outer wall trimming allowance. Smooth carefully while keeping the artwork aligned.

4. Overlap Corners and Obstacles

For inside corners, overlap mural seams by at least 1/8 inch. For edge corners, overlap by a full inch and trim for a snug fit. Make relief cuts at sockets, windows, doors, and corners. This helps the mural lie flat and keeps the pattern continuous.

5. Double Cut the Overlap

Check that the duplicated artwork aligns across the overlap. Using a straightedge and a sharp blade, cut through both wallpaper layers along the center of the 2 in (approximately 5 cm) overlap. Use a suitable seam-cutting protection strip underneath to protect the wall. Remove both excess strips, then bring the remaining edges together and smooth the seam. The finished edges should meet without a gap or remaining overlap.

6. Trim Edges and Finish

Trim excess wallpaper or mural material along the top, bottom, and sides. Use a sharp blade to make it flush with ceilings, baseboards, and corners. Wipe away glue residue immediately with a damp cloth or baby wipe to avoid visible marks.

7. Smooth and Inspect

Work along all seams with your smoothing tool to remove any bubbles and ensure tight bonding. Adjust any misalignment before adhesive has fully dried. Check all edges and trims for a flawless finish.

Pro Tips for Overlap & Double Cut Wallcovering Installations

  • Check panel numbers and artwork alignment before applying each panel.
  • Use the supplied 2 in (approximately 5 cm) overlap at vertical panel seams. Do not add this margin to your wall measurements.
  • Use a sharp blade and protect the wall beneath each double cut.
  • Keep the outer wall trimming allowance separate from panel overlaps. When centered, the extra height provides approximately 1 in at the top and bottom.
  • Check full wall coverage before trimming excess at the ceiling, floor and side edges.
  • You or your installer trim around doors, windows and other openings during installation.
  • Follow the adhesive, handling and finishing instructions supplied for your selected material.

FAQ

Yes. Overlap and double cut work well for non-woven, peel-and-stick, commercial, and specialty wallpapers. This method ensures tight, invisible seams and keeps the pattern matched perfectly.

XWALLX supplies a 2 in (approximately 5 cm) overlap allowance at adjoining panel seams. Match the duplicated artwork within this area, then double cut as instructed. This seam allowance is separate from the trimming allowance around the outer wall edges.

Overlap prevents gaps or shrinkage between panels. It also hides seams and ensures a smooth pattern flow. Double cutting achieves precise, invisible joins—even through thicker materials.

For standard full-height mural panels, overlap adjoining panels along their vertical seams, then double cut. At the ceiling, floor and outer side edges, leave the supplied wall trimming allowance extending beyond the area being covered, then trim it flush. These outer edges are trimming areas, not panel overlap seams.

DIYers can also achieve great results with the overlap-double cut technique. Here are some steps to follow: use quality tools, and take your time to align and trim accurately.

Conclusion

As XWALLX, we use the overlap and double cut technique for wall mural and wallpaper installations. This method is the best choice for all materials. Follow these holistic steps for flawless, long-lasting results- beautiful, seamless walls every time