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In your DIY cards on the wallpaper, you do not say how many pieces it is possible to make in a roll? Indeed, how to determine the number of rolls to buy according to the dimensions of the room? It seems to me that 4 les are possible per roll for wallpaper without connection. A quote requested from a professional totaled only 3 per roll and especially counted the windows as parts to upholster! Is this a scam start?

The standard widths are 10.5 m.

The number of tiles depends on the height under ceiling, and 4 les remain the rule, but the pros often have 3.

The doors and windows must of course be counted!

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Video Instruction: How many wallpaper rolls needed