The reason for this is based on the principle of adhesion.
Wallpapering over vinyl wallpaper.
You should make every effort to remove the vinyl wallpaper first before trying to cover anything.
You must make every effort to remove vinyl coated wallpaper first.
Otherwise perform the same steps as if you were painting over your wallpaper.
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How to hang new wallpaper over old wallpaper.
Vinyl is nonporous so new wallpaper will not stick to it and adding a layer on top of it will create mold.
Unfortunately wallpapering over vinyl wallpaper is not an option.
When moving into an older home finding remnants of previous occupants wallpaper isn t uncommon.
You must remove it before putting new wallpaper up.
Wallpaper adhesives stick best on porous surfaces and coated papers have zero porosity.
Stripping old wallpaper is a time consuming task you.
In this video i demonstrate how to hang wallpaper over existing wallpaper.
A safe way to determine if your new wallpaper can be applied over the old paper is to see if you can tell what kind of wallpaper is currently on the wall.
The existing wallpaper s material.
We also recommend not wallpapering over a wallpaper that is embossed or embellished as it will create bumps.