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Reading corner with a painted arch accent wall
Do it yourself

How to Paint an Arch on a Wall

A painted arch accent wall is easy to create and adds character, a nice retro vibe, and soft curves to any room. This interior painting trend continues to make waves in many living spaces. Discover how to make your own in just a few simple steps!

Colour Palette

When it comes to choosing paint colours, we recommend drawing inspiration from the accessories in the room. Pick a colour that you like, then take the other shades from SICO’s curated palette to ensure a perfect match. For a bolder look, you can use complementary colours. It all depends on the look you want to achieve, so let your creativity flow!

Select a Design

  • 1.1 - The number of arches depends on the space, the area to be covered, and the desired look. For example, a single arch can accentuate a piece of furniture (such as a desk, nightstand, or dresser). On the other hand, a combination of arches will create a trendy accent wall.
  • 1.2 - When it comes to height, we recommend not going over the door frames (7’ height). When creating your design, keep in mind that to get a perfect arch, the height of the semicircle must be exactly half the width. For example, if you want an arch that’s 6’ tall and 2’ wide, you’ll need to trace the two vertical lines all the way up to 5’ from the floor. However, there are other less traditional types of curves.
  • 1.3 - Either way, preparation is key! It’s always a good idea to draw a line on the wall before you start. You can also take a photo and use an online drawing tool to sketch it and see the effect.

Pro Tip

If you go for a wall design that includes multiple arches, a good trick for deciding on heights is to start with the tallest one, and then remove a fraction for each subsequent arch (e.g., 6’, 4.5’, and 3’).
Man measuring a wall
Man using a level to trace a line

Trace the Vertical Lines

  • 2.1 - Starting from the floor, measure the space from side to side and divide by the desired number of arch strips.
  • 2.2 - Mark each section with a small piece of tape or a pencil, making sure to space the arches evenly (unless you’re looking for that overlapping look).
  • 2.3 - Using a level, mark all vertical lines at a few spots with a pencil.
  • 2.4 - Once all vertical lines are marked, apply masking tape outside the arches that will be painted first (here, arches 1 and 3).
Man using a tape measure
Man tying a string onto a pencil
Man thumbtacking a string on a wall
Man tracing a semicircle
Man applying tape onto a wall
Homme coupant du ruban avec un exacto
Homme retirant des morceaux de ruban à masquer

Trace the Semicircles

  • 3.1 - Measure the width of the first arch strip and divide that number by 2 to find the centre. Mark it with a pencil.
  • 3.2 - Cut a string to the length identified above, plus 1-2” extra.
  • 3.3 - Tie one end of the string around the tip of a pencil.
  • 3.4 - Tape or thumbtack the other end at the centre point of the arch (previously marked).
  • 3.5 - Place the tip of the pencil on the wall at the end of the first vertical line then slowly move the pencil up and over the centre point, making sure the string is extra taut at all times, until you reach the end of the other vertical line.
  • 3.6 - Repeat this step for the other arch strips.
  • 3.7 - Contour the semicircles of arches 1 and 3 with masking tape.
  • 3.8 - Using an all-purpose knife, lightly trace over the pencil line then peel away the bits of tape.
Person trimming a moulding
Man painting an arch on a wall
Man removing tape from a wall

Paint Arches 1 and 3

  • 4.1 - Place a drop cloth on the floor and add masking tape to protect the baseboard.
  • 4.2 - Use a paint brush to trim along the baseboard.
  • 4.3 - Use a roller to fill in the inside of arches 1 and 3.
  • 4.4 - Repeat the steps above for second coat and let dry completely.
  • 4.5 - Remove the tape around arches 1 and 3, then allow the paint to dry.
Man applying tape on a wall
Man painting an arch on a wall
Man removing tape from a wall

Paint Arches 2 and 4

  • 5.1 - Apply tape to protect arches 1 and 3.
  • 5.2 - Repeat steps 4.2 to 4.5 for arches 2 and 4.


These DIY projects are provided for informational purposes only. The information contained in RONA’s DIYs is intended to provide general guidelines to simplify jobs around the house. Because tools, products, materials, techniques, building codes, and local regulations are continually changing, RONA inc. assumes no responsibility for the accuracy of the information contained herein and disclaims any liability for the omissions, errors, or outcome of any project. RONA inc. makes no representation on the feasibility of any project and the viewer bears all risks coming with the realization of the projects. It is the responsibility of the viewer to ensure compliance with all applicable laws, rules, codes, and regulations for a project. The viewer must always take proper safety precautions and exercise caution when taking on any project. If there is any doubt in regard to any element of a project, please consult a licensed professional. 

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