We’ve written a few blogs on the importance of lining your walls before decorating, and gone through some of the types of lining paper you might need. To simply recap, it probably is best to always use lining paper if your walls are less than perfect. It is relatively inexpensive and can make the difference between a smooth finish if you’re painting on top of it or longevity and a quality finish if you’re wallpapering over it.
It’s also important to consider the grade - or how thick - the lining paper you choose should be. Lining papers typically range from 800 Grade (thinnest) up to 2,000 Grade (thickest). However, at time this might not be enough and that’s when you should consider wall liners such as Wallrock R300.
They do vary a lot in between but the basic rule of thumb is to consider the state of your walls and the sort of finish you’re after.
Most DIY high street stores only stock the lower grades - you’re most likely to find up to 1,400. The thicker grade papers need to be sourced online or from few brick and mortar stockists.
Higher grade lining will need to be soaked (rested with wallpaper paste on) to become pliable enough to hang, and the thicker the grade the more consideration you need to give to the process - depending, of course, on your experience levels and the room shape, size and where you need to hang it (i.e. walls or ceiling).
Lining paper is not the magic bullet to make all your walls totally perfect. Preparation is needed even before the lining paper, particularly if your walls are very uneven - holes will still need to be filled and walls sanded down to remove ‘goose- bumps’ imperfections. But lining paper will give you a smoother, better base from which to work.