How to Wallpaper a Room

Wallpaper transforms a room in a way paint can't - texture, pattern, and depth that holds up for 10-15 years when done correctly. The key challenges are accurate roll estimation (especially with pattern repeat), proper wall prep, and hanging the first strip perfectly plumb. Everything else follows from those three.

Tools & Materials Checklist

• Wallpaper smoothing brush
• Seam roller
• 4-foot level for the plumb line
• Sharp utility knife and broad knife
• Wallpaper-specific primer

Step 1: Calculate Rolls Needed

Use the Wallpaper Calculator to get the exact number of rolls - enter your wall dimensions and pattern repeat. Pattern repeat is the most common source of under-ordering: a 12-inch repeat on a 10-foot wall wastes nearly a full repeat per strip. Always order one extra roll as insurance - dye lots change between production runs.

Step 2: Choose the Right Adhesive

Pre-pasted wallpaper is activated with water. Unpasted wallpaper needs paste applied to the back or to the wall (paste-the-wall is easier for most papers). Peel-and-stick requires no adhesive but is less forgiving of bumpy walls. Check the manufacturer's recommendation - using the wrong adhesive causes peeling and bubbles.

Step 3: Prep the Walls

Wallpaper reveals every imperfection - fill holes and cracks, sand smooth, and prime with a wallpaper-specific primer. The primer seals the surface so paste doesn't soak in unevenly and makes future removal far easier. Wash walls to remove grease, especially near kitchens.

Step 4: Find the Starting Point and Plumb Line

Don't use a door frame or corner as your starting line - walls are never perfectly straight. Use a level to draw a true vertical plumb line where your first strip will hang. Plan the layout so you don't end up with a sliver of paper in a prominent corner.

Step 5: Cut and Book the Strips

Cut strips 4 inches longer than your wall height to allow for trimming. For patterned paper, align the pattern at eye level and cut subsequent strips to match. For paste-the-back paper, apply paste and fold the strip paste-to-paste (booking) - this lets the paper relax for 5-10 minutes before hanging, preventing bubbles.

Step 6: Hang the First Strip

Align the edge of the first strip exactly on your plumb line. Smooth from the center outward and downward with a wallpaper brush to remove air bubbles. Trim the excess at ceiling and baseboard with a broad knife and sharp utility knife. A dull blade tears paper instead of cutting it.

Step 7: Hang Subsequent Strips

Butt each new strip tightly against the previous one - seams should be invisible, not overlapping. Match the pattern at eye level first, then smooth top and bottom. Clean paste off the surface as you go with a damp sponge - dried paste shows as a sheen under certain lighting.

Step 8: Handle Corners and Obstacles

Wrap paper around inside corners by cutting the strip to overlap 1/2 inch past the corner, then hang a new strip starting fresh from a new plumb line. For outside corners, wrap 1 inch and overlap with the next strip. Around outlets, hang the strip over the opening and carefully cut an X to expose it.

Common Mistakes to Avoid

• Using a door frame or corner as the starting reference instead of a true plumb line — walls are rarely straight.
• Skipping wallpaper primer, which lets paste soak in unevenly and makes future removal much harder.
• Hanging paste-the-back paper without booking it first, which increases the chance of bubbles.
• Overlapping seams instead of butting them tightly, which creates a visible ridge and shadow line.

Pro Tips

• Use a seam roller on seams after 15-20 minutes to ensure full adhesion - but not on embossed paper.
• Keep a damp sponge nearby and clean paste off immediately.
• If a bubble appears after drying, make a small slit with a craft knife, inject paste, and smooth flat.
• Wallpaper paste has a working time of 20-30 minutes after application.

Frequently Asked Questions

Do I need to prime walls before wallpapering? Yes, especially on new drywall or when removing old wallpaper — a wallpaper primer (sizing) helps adhesive bond evenly and makes future removal much easier.

How long does wallpaper paste need to set before hanging? Pre-pasted wallpaper typically needs 1–3 minutes of "booking" (folding paste-side together) before hanging; traditional paste-the-wall products can be hung immediately after applying paste.

Can peel-and-stick wallpaper go over textured walls? Peel-and-stick adheres best to smooth, flat walls. Heavily textured walls will show through and may not adhere well long-term — skim-coating first is recommended.