Yes you do. Why? Inner and outer corners on internal walls are very rarely completely straight as Clark explains: “Walls and corners are rarely straight, so it's important when wallpapering any corner to ensure your drops remain vertical and parallel to the other drops.”

Smooth the seams between lengths of wallpaper with this tiny roller - but make sure not to use it on embossed or fragile papers. Combination smoother/cutter

Tools

When you soak wallpaper to prepare it for stripping, score the surface first with a rotary scorer as it helps the water to penetrate. Then just use a scraper to lift the paper off the wall. Paper-hanging brush Step 2: Measure your wallGet the vertical height of your wall using a measuring tape and spirit level for accuracy, and measure this out on your wallpaper, but add an extra 5 to 10cm to allow for any trimming. If you’re wondering where to hang the first piece of wallpaper, avoid starting from a corner as this edge may not be completely straight. Instead, use the spirit level (to ensure it’s straight) and mark a vertical line 50cm from the wall edge. Want to make sure you hang your wallpaper straight? Use a plumb line (a weight on the end of a string) to get a perfectly straight vertical line. And if you need to draw a straight edge on most surfaces, snap a chalk line. Wallpaper scorer Both of these wallpapering tools are used to cut paper-based, pre-pasted strips of wallpaper lengthwise. This could be necessary if, for instance, there isn't room for the entire width of a wallpaper strip on the wall. However, if you are hanging lining paper or a patterned wallpaper like Anaglypta that is going to be painted you can cut the paper flush into the corners if you want. If there are any small gaps left they will be hidden by paint. What can go wrong when wallpapering corners?

Prep your wallsYou should also ensure any existing wallpaper has been stripped away to avoid any air bubbles or bumps when you lay the new sheets. All freshly plastered walls should have wall sealer applied prior to wallpapering, as this is crucial for seamless and successful application. For any wall fixtures, ensure the mains are switched off for that circuit and hang your wallpaper along that stretch of wall, then pinch and press down over the fixture’s faceplate, before trimming diagonal slits to the centre from each corner. Then cut the paper away completely, but leave a 6mm of excess. Paste the paper to the wall and where the fixture is, loosen the faceplate screws slightly, before feeding a few millimetres of excess paper inside and tightening again. Measure the next strip, allowing for uneven plastering again, and draw a vertical line in pencil at a slightly broader width.

Straight edge - variations

Step 5: Hang the next strips of wallpaperRepeat step 3 again and keep going until you get to a corner. Once you’ve laid it down in its section and are happy with the alignment, use your soft seam roller to smooth between the two wallpaper strip lines for a flawless finish. How to hang patterned wallpaperTake things slow and pay particular attention to detail if you’re working with patterned paper, as you need to ensure that the pattern perfectly aligns. To make this a little easier, place the second piece up to the first and make any length adjustments you need to match the patterns up before pasting it down. These scissors have extra-long blades that make it easier to cut your wallpaper in straight lines. Wallpaper table (pasting table) Remove or cover your furnitureAvoid having furniture in the room you’re working in, too, if possible. If not, cover it with dustsheets, along with the floor. Finally, clean the surfaces you’ll be working on thoroughly using our range of cleaning products, to avoid any bumps or marks. Carefully unfold the first part of your concertina and place it into position with the edge of the paper on the guide line.