You can paint over wallpaper. But you probably shouldn't. Here's the professional take on when it works, when it fails, and what to do instead.
When Painting Over Wallpaper Works
Painting over wallpaper can work if: the wallpaper is firmly adhered with no lifting edges or bubbles, there's only one layer (multiple layers almost always fail), the wallpaper has no embossed texture that will read through the paint, and the walls will be painted a dark color (which hides seams better). Proper process: prime with an oil-based primer, skim coat any visible seams, sand smooth, then paint. It's more work than people expect.
Why It Usually Fails
Most painted-over wallpaper fails within 2-5 years. Reasons: seams become visible as humidity expands and contracts the paper, bubbles form where adhesion was weak, and if the wallpaper ever needs to be removed, it brings paint and sometimes drywall facing with it. The 'save money now' calculation usually results in 'pay more later' when the wallpaper removal bill includes skim-coating damaged drywall throughout the room.
The Right Answer: Remove First
Professional wallpaper removal costs $1.50-$3.50/sq ft including skim coating and prep. A 12x14 room averages $600-$1,200. It's not cheap — but it's the right foundation for paint that lasts. We use DIF wallpaper removal solution, patience, and the right tools to minimize drywall damage. After removal, we skim coat the walls, sand, and prime before painting. The result is smooth walls you'll enjoy for 15 years.
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