Does it need lining? ......
This is a question we are often asked, and the answer is more often than not yes.
Lining paper is used to create a surface of equal porosity when used as a base for wall coverings, there is a misconception about using lining paper that it is only needed if you have poor quality walls, this is one reason for using a liner but there are several others.
Lots of today’s wall coverings require special adhesives depending on the type of paper or backing it has been printed on, most wall coverings when they have paste applied to the backing expand sometimes up to as much as 10 or 12 mm. And as the paper dries it then shrinks if you wallpaper on to a surface that is not lined you may have areas of the wall that are more absorbent than others sucking the moisture out of the adhesive causing the paper to expand and contract at different rates which inevitably will cause problems as the paper dries.
There are different thicknesses of lining paper available from 400 grade right up to 2000 grade and different qualities, the main brand which we use and most of the trade use is Erfurt. The lower the grade of paper the thinner it will be. Most trades people would use around the 1200 or 1400 grade for average walls. If your walls are in a very good condition and you are hanging a printed wall covering you could choose one of the lower grades or alternatively if they are in poor condition you would choose One of higher grades.
Having said that lining paper is not a miracle cure for very uneven or rough walls they still need to be sanded and filled several times and primed or sized before you hang your lining paper.
Things to be aware of when hanging your lining paper are the joints any overlaps will show through your finished wall covering, but also if the gap between the lining paper is too wide this will also show through the wall covering, ideally you should try to maintain an equal gap of around 1 or 2 mm at the most.
There are many different types of lining paper available, Insulating lining paper for cold walls, fibre liner for difficult surfaces prone to slight movement, Sound insulating liner and several others all of which can be purchased from most good trade outlets.