Can I use wallpaper in a room that tends to get wet?

This is something I often get asked and the easy answer is yes.
However; there are some circumstances where this is just simply not practical.
Before you go ahead and start ordering your paper there are a few questions you should ask yourself.
How wet does the area get?
Is there adequate ventilation?
How often is the area used?
Using a coat of simple Decorator’s Varnish over your layer of wallpaper will seal it up perfectly, protecting it from the surrounding heat and moisture. It is a well-known and trusted trick, and even interior designers who use expensive wallpaper will still use the standard varnish to protect it. It will be safest to go with a dead flat finish varnish for most designs, but in other cases you might want to opt for a satin finish.
Some wet rooms where wallpaper is often considered are: Powder rooms & bathrooms and in some cases these rooms are “occasional” rooms and in which case certain wallpaper is ideal.
Most wallpapers on the market today, and especially those marketed specifically for high moisture areas, are covered with a film to protect it from water damage. It consists of a layer of non-porous film (mostly vinyl) laminated on top of a layer or printed fabric or paper substrate. This is much more durable than conventional wallpaper, as the paper is not susceptible to absorbing water.
The products available to us today are also super easy to clean. The treatment of these types of wallpaper can simply be wiped with a damp rag to clean. Stains don’t typically soak into properly treated wallpaper, so it will last longer.
Another great benefit of modern-day wallpaper products, is that most high-quality brands are free from acetone and turpentine, which can produce dangerous fumes and poor indoor air quality.
Back in the day, vinyl wallpaper was rather unattractive. Over the years, however, manufacturers and designers have put a lot of thought into improving this product, and now we find a wide range of designs for vinyl and blown vinyl wallpaper.
Vinyl wallpaper has several benefits, including being appropriate for use in most areas, it is easy to clean, it is available in a wide range of textures and colours, it is safe for indoor air quality, and great for hiding imperfections (more on that later).
What’s more, we get several designs of vinyl tiles resembling porcelain tiles. Not only do these tiles look hyper-realistic, but they are also far less expensive than the real thing, meaning you can change your look more often for less.
If you’re still not convinced and a little wary of using paper as wallcovering in your bathroom, this may be just the solution for you. Using your ideal print of wallpaper in combination with tiles can allow you to try out this new material in the bathroom while still playing it safe. Simply tile the area most likely to get wet (close to the bathtub, for example), and use wallpaper on the upper areas of the room. Given, the wallpaper here will still be exposed to steam, but much less direct moisture. Since we are only going to use properly treated products in any case, this should be completely safe.