Fail to prepare , prepare to fail. Preparation is the key to a good finish whether painting or paper hanging.

 When painting will your decorator do the following? 

• fill any minor defects
• sand the walls/woodwork with the corect grades of sanding paper/wet and dry paper
• wash down the areas with sugarsoap to de-grease the surface
• apply the correct undercoat and the correct number of finish coats 
• use the correct paint for the area it is to be applied to
• consider whether  it is a high foot traffic area, like a hallway or staircase and use appropriate products
• consider if the area will suffer from condensation or high temperatures

All of the above are standard practice for SplashofColours 

When paperhanging again preparation is key.  Does it require applying a lining paper?  I have included a paragraph from a very respected paperhanger              B Archibald" National Guild of paperhangers"