Forget your YouTube videos, here’s a good old-fashioned blog on how to draw a straight edge when wallpapering. I’ll make a “straight” forward list of three of the most widely used methods, along with the pros and cons for each method.
Using a Plumb Bob
A plumb bob is a bit of an old-fashioned tool now-a-days, but its something that all decorators used to use and some still do. It consists of a weight on a piece of string (yes, very basic). You pin the string to the top of the wall where you want your straight edge to be, just short enough so the weight hangs above the skirting board. The string is then completely level and you can use it as the guide for your wallpaper.
There are a couple of advantages of using a plum bob over other methods. For example, you can start to hang your drop of paper, then pin the plumb bob to the top, rather then measuring out to begin with. Once the plumb bob is attached to the wall, you just push the paper up to the line. The other major advantage is you don’t need to mark the wall in any way like you would with a pencil line.
The disadvantage of this method is your straight line (the string) isn’t flush with the wall, rather a few mm out due to the width of the weight. The string is still level, but it does play with your eyes a bit when you’re trying to line up the paper.
Using a Spirit Level and Pencil
Most decorators use a spirit level. All you need to do is measure where the edge of your first drop will be and mark with a pencil. Then using the spirit level, mark a vertical line with a pencil.
This method is very simple, but always double check your line before you start wallpapering because it’s easy to get it wrong and run out slightly. The massive disadvantage is you’ll need to mark the wall with your pencil which can show through some papers. I have had issues with pencil lines showing through expensive Harlequin papers in the past, which cost me a lot to rectify. So, if you’re physically marking the paper with a pencil, then only mark a light line. See current prices of spirit levels here.
Using a Laser Level
At last, a more modern approach to drawing a straight line!! I use a Stanly Cubix for all my wallpapering and it’s a game changer!! It’s the more expensive option (around £50), but if you have the money then it’s well worth it. All you need to do is point it at the wall where you need a straight edge, and it gives you one. You don’t need to mark the wall, it only takes a few seconds to set up and it’s completely accurate every time.
The only issue is if there is loads of light in a room and the laser light seems a bit weak. This hardly ever happens though. Click here to see current prices.
Final Thoughts
I suppose it doesn’t matter how you draw your straight edge when wallpapering, providing it’s straight and level. I’ve got used to using my laser level now, but I know some decorators who still use a plumb bob. If you don’t install wallpaper too often, then there is very little wrong with using a spirit level and pencil.
FAQs
Why is drawing a straight edge important when wallpapering?
You need your wallpaper to be completely plum and straight, otherwise it throws the pattern out and it won’t match all the way around the room. It also makes papering around windows and fire surrounds a lot more difficult.
What tools can I use to draw a straight edge when wallpapering?
Most Decorators just use a spirit level and a pencil, but a laser level is far easier to use.
How do I use a chalk line to draw a straight edge?
All you need to do is extend the string along the line you intend to mark, then ping it. The string is coated with chalk which transfers to the wall to mark your line.
Can I rely on the edges of the wall to be straight for wallpapering?
No. You need to ensure the wallpaper is always plumb, otherwise you’ll have a nightmare trying to install it. Do not rely on the edges of the wall.
How do I measure for the first strip of wallpaper?
Measure the hight of your wall then add the pattern repeat of the wallpaper. You should try to balance the paper too, so the ceiling line doesn’t cut through an obvious part of the pattern, and if possible, the pattern should be symmetrical.
Should I draw a straight edge before or after applying wallpaper paste?
If you are using non-woven wallpaper, you’ll find it a lot easier if you mark the straight edge before applying paste to the wall.
How do I maintain a straight edge if my wall isn’t perfectly level?
Regardless of whether your walls are level or not, it is important that you keep your wallpaper plumb all the way around a room. You should draw a new straight edge at the start of each wall, or at the other side of obstacles like door frames. It also helps to double check after every few drops, just to ensure your paper isn’t running off.
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