How to Paste Wallpaper in a Container House

When pasting wallpaper in a container house, you need to first treat the wall surface, then measure and cut the wallpaper, apply glue, and finally paste and trim it. Here are the detailed steps:

Wall Surface Treatment

• Cleaning and Repair: Remove old wallpaper, loose paint, oil stains, dust, etc. from the wall surface. For pits and cracks on the wall, apply putty in 2 - 3 layers to level it out. After each application, wait for it to dry completely and then sand it smooth with sandpaper. The drying time for putty is about 4 - 6 hours in summer and may take overnight in winter.
• Solving Moisture Problems: If the wall is damp, you must first solve the problems of water leakage and moisture return. Use a fan or dehumidifier to thoroughly dry the wall. The moisture content should preferably be below 9%. Otherwise, pasting wallpaper on a damp wall can easily cause large-scale wrinkling.
• Treating Highly Absorbent Walls: For new cement walls, apply a layer of wallpaper base film (also known as an interface agent). The function of the base film is to seal the pores in the wall, preventing the wall from absorbing too much moisture from the glue, which could cause the wallpaper to dry too quickly in some areas and shrink and wrinkle. After the base film is dry, then paste the wallpaper. It usually takes 1 - 3 hours.

Measuring and Cutting Wallpaper

• Measuring Wall Height: Use a tape measure to measure the height of the wall from top to bottom. Measure at multiple points and take the maximum value.
• Cutting Wallpaper: The cutting length of each piece of wallpaper = wall height + 10 - 15 cm (reserve 5 - 8 cm at the top and bottom for trimming). For patterned wallpaper (with obvious patterns that need to be aligned), first lay out two rolls on the ground, find the complete pattern repeat unit, calculate the 'pattern alignment difference', and cut according to this. When cutting, use a pencil to mark the back of the wallpaper, indicating the piece number, which side is up, and which side is left.

Applying Glue

• Applying Glue to Wallpaper: Use a brush to apply wallpaper glue to the back of the cut wallpaper. Pay special attention to ensuring that the edges are fully coated with glue. After applying the glue, fold the wallpaper with the glued side facing in and let it sit for 5 - 10 minutes to allow the glue to fully penetrate the paper.
• Applying Glue to Wall: Use a roller to evenly apply the glue to the wall surface. The thickness should be about 2 mm, and the width should be wider than the wallpaper, leaving some extra space.

Pasting and Trimming

• Pasting Wallpaper: Generally, start pasting the first piece of wallpaper from the door frame or inside corner, working from top to bottom. Use a scraper to gently smooth the wallpaper from top to bottom and from the inside out, squeezing out air bubbles and excess glue to make the wallpaper lie flat against the wall.
• Trimming and Cleaning: Cut off the excess wallpaper at the top and bottom ends. The blade should be sharp to avoid rough edges. Then use a sponge dampened with water to completely wipe off any glue residue on the surface of the wallpaper.