Every Inch of the Existing Wall Needs To Be Inspected. Installations of new wallpaper over an existing layer are unlikely to meet these safety standards.Ģ. Why a 2nd Layer Can Affect the Paper’s Fire Ratingīuilding codes set stringent requirements for fire safety. Materials with a flame spread index below 25 achieve a Class A rating. ![]() NFPA tunnel tests measure how quickly a fire spreads and the progress it makes during the test. The National Fire Protection Association (NFPA) institutes standards and codes for dealing with fire prevention. A Class A fire rating is the highest rating available. Even though most wallcoverings will burn, if it has a rating of Class A, the speed at which flame and smoke spreads is reduced. Hanging Wallpaper over Existing Wallpaper can Negatively Impact Class A Fire Ratings.įire ratings are a measure of how well an individual wallcovering resists the spread of flame and smoke. ![]() The best way to guarantee that result is to completely remove the old wallpaper.Ĥ Setbacks and Dangers To Be Aware Of 1. The main reason is that you want your new installation to look perfect. The best way to prepare any wall with existing wallcoverings is by stripping it down to it’s foundation.Įxperts advise against wallpaper over wallpaper installations for many reasons. ![]() Although it may seem a viable option, ROMAN does not recommend installing new wallpaper on top of existing wallpaper. The first step in a great installation is proper wall prep.
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