vertical lining paper

I’ve started to strip off old artex from my hall. It is coming off reasonable easily using a heat gun and a narrow scrapper. There are odd patches that I’ll need to fill but most of the walls are sound but not very even. As it was built in 1905 it has seen a lot of life.

I’d like to finish with a textured wallpaper painted to the colour my wife chooses.

As the walls are not perfect, I think lining paper before the textured paper is a sensible way to go. Is it ok to hang lining paper vertically? I was thinking of starting with a half width piece so the joins will not be in the same place as in the finish paper.

My reason for thinking of this is that one wall is 4.2m long and they are all 3.0m high. Hanging it horizontally off one ladder seems to be impossible.

I believe that (if painting walls) lining paper was supposed to be used with one layer horizontal and one vertical. I could be wrong.
Buy another ladder and a board to do horizontals.

You could just get the walls skimmed

Lining paper is a different width to top paper for this reason, the gaps will never line up.
I have always put it up vertically and it's been fine.

Definitely try and do it cross ways. If you use a strong paste ,(a tub of ready mixed will be best) it should hold in place as you move the ladder along. Obviously if you have two steps and a plank, even better. It is also so much quicker doing it cross ways.
You have to fold the paper differently to normal though in a concertina fold so it unravels as you go. I always find right to left easiest.

I know you're supposed to line horizontally, but I've always done it vertically with no issues.

Sound mate. I Have also done it a few times myself and it would be fine. I just find it so much easier to cross line. Each wall takes about an hour tops!
Each to their own

I'm coming back onto this post as I am getting close to having all the artex removed and being ready to line paper the walls. I will line them horizontally.
I have two questions.
How do I go round an internal corner. Do I take the lining paper about 50mm onto the next wall and start the paper for the next wall in the corner? That seems the best way to me but am I wrong?
How about external corners. My thought is to simply keep going so one strip of paper covers both walls. Am I right?

I always line vertically. External corners I just go round, internal ones I lap round leaving about 10mm and then lay the next strip overlapping it right into the corner.
I always use overlap/border adhesive on the internal corners.

50mm is way too much. 10 to 20!
Exernals just keep going round.

I too hang it vertically in most cases. I know that purists argue that doing it horizontally and then hanging the paper vertically equalises the tension on the wall, but I find it hard to believe that paper puts that much stress on a wall.

Lining paper is 56cm, standard wallpaper is 54cm. It is not difficult to ensure that the top paper will not coincide with joins in the lining paper.

Internal corners, I cut in to the corner and then caulk. External corners, I work in victorian houses, I work on the assumption that the corner is out of square. I run the lining paper around the corner (by about 10cm), putting horizontal cuts in it as need to compensate for bows. Whilst it is still wet I lay another sheet of lining paper over it. I then use a straight edge and knife to cut through both layers of paper and remove the old excess paper and new excess paper. I normally aim for the first bit of paper that is left around the corner to be about 3cm wide.

Alternatively, I run up to the external corner, let the paper dry, cut away the excess, then line the other side of the corner let that dry and then, again, cut away the excess. I then lightly sand the corner using a sander connected to a dust extractor.

A lot of my fellow decorators prefer horizontal lining. They find it faster but they are happy to leave gaps in the joins. I hate gaps.