If you plan to upgrade your indoor space, it is a good choice to change a beautiful wallpaper. But if you live in an old house, there may be some redundant problems on the wall, such as sticking old wallpaper and cracks, which need to be properly handled to ensure the best lighting and aesthetic effect.

Before pasting wallpaper, you can prepare the wall of an old house in the following ways:

1. Remove the old wallpaper: First of all, the old wallpaper must be completely removed. Use the traditional mixture of water and soap to clean the wall and remove the old pigments and impurities. Then apply formaldehyde, potassium benzoate, hydrofluoric acid or other remover, and then remove the remaining wallpaper with a scraper or broom.

2. Repair cracks: After removing the old wallpaper, some cracks may appear on the wall. After mixing some fillers, fill the cracks and defects with putty knife, and after drying, use abrasive tools to shape them. This process needs to be repeated until the flatness of the wall is perfect.

3. Paint: In order to get the best wallpaper effect, it is best to brush a layer of bactericidal or waterproof paint on the wall to ensure the accuracy and smoothness of the wall, thus providing a strong support for your new wallpaper.

4. Measure the wall: Finally, before the wallpaper construction, accurately measure the length and height of the wall you want to mount. Starting from the corner, align the two paragraphs vertically, then trim the wallpaper neatly with the wallpaper cutting tool and cut off the redundant parts.

When you are prepared according to these methods, you can easily paste new wallpaper and make your old house look brand-new and more fashionable and comfortable.