Isabella Flores
Painting rounded corners on drywall can be a challenging task, especially if you're aiming for a flawless finish. The curved edges of rounded drywall corners, also known as bullnose corners, present unique considerations when it comes to deciding where to start and stop painting, and the technique you'll use. In this guide, we'll cover the steps to prep rounded corners for painting, including repairing any flaws, priming, and achieving smooth finishes. We'll also discuss strategies for painting rounded corners with one or two colours, ensuring a seamless and visually appealing result.
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What You'll Learn
Choose one colour for a seamless finish
Painting drywall with rounded corners can be a challenge, especially if you want to use two different colours. The best way to achieve a seamless finish is to choose one colour. This eliminates the problem of deciding where to start and stop painting each colour, and ensures a consistent and flowing look.
If you are set on using two colours, you will need to decide which room or wall is the primary and which is the secondary. The primary colour will be used on the majority of the wall and the secondary colour will start where the wall resumes its flatness. However, this can be tricky to execute well, and it is not recommended unless you have a steady hand and a good eye.
To achieve the best results with one colour, it is important to prepare the surface properly. First, repair any flaws in the drywall, such as cracks or holes. Then, use a vacuum attachment and a clean tack cloth to eliminate dust and drywall remnants. You can also use a damp sponge to wipe away dust between sanding and additional coats of paint.
Next, apply a primer to create a uniform seal. This will ensure that the finishing paint looks flawless and that there are no inconsistencies in sheen or texture. Once the primer is dry, you can start painting. Use a 1/2-inch nap roller and a nylon/polyester brush to achieve seamless coverage. Apply thin, even coats to prevent overlapping roller marks and visible brush marks.
By following these steps and choosing one colour, you can achieve a seamless and professional-looking finish on your rounded drywall corners.
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Use moulding to cover mistakes
Painting drywall with rounded corners can be challenging, especially if you want to use two different colours. If you're unhappy with how your rounded corners look after painting, you can always start over by covering the edges with moulding. This will give you a fresh start and a clean, tight vertical line between your two colours.
Moulding is a great way to cover up mistakes made during the drywall installation process. One common mistake is not having proper edge support, which can make it impossible to fasten the edge of the drywall. Inspect the framing before you start and ensure there's at least 1 inch of exposed framing at the corners. If not, simply add another 2x4 alongside the existing framing.
Another mistake to avoid is lining up a sheet of drywall with the edge of a door or window opening. Over time, your home will shift and settle, and this movement will show up as cracks at the corners of windows and doors. Instead, notch the drywall around openings, or cut out the opening after you've fastened the sheet.
If you're dealing with mould on your drywall, it's important to act quickly to prevent long-term health issues and structural damage. Depending on the size and depth of the affected area, you may be able to clean it yourself or you may need to replace the drywall altogether. Be sure to identify the type of mould and take the necessary precautions, as some moulds are more hazardous and may require professional handling.
In addition to moulding, you can also use joint compound to cover up imperfections in your drywall. Apply a smooth layer of joint compound with a taping knife, spreading it evenly without any gaps or excess buildup. Let it dry thoroughly between applications to create invisible seams and minimise sanding. Proper compound application and drying will result in seamless painted corners.
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Smooth out the surface
Before painting, eliminate dust remnants from the drywall installation using a vacuum attachment and a clean tack cloth. You can also use a damp sponge to wipe away dust between sanding and additional coats. To ensure a perfectly smooth finish, inspect corners under bright light. Target any remaining tool marks or imperfections for additional sanding.
If you notice any loose edges of drywall facing paper, pick them away and prime the leftover raw paper with any type of priming paint. You can use a product like Kilz, which seals well and dries fast. Dab at the wet paint with a foam brush or rag to saturate the paper and wipe away any runs. Let the paint dry, and then lightly sand away any standing paper nubs. If you sand through the paint and expose fresh paper, paint it again to prevent the paper from absorbing moisture from the taping compound and paint.
If you notice any cracks, hairline cracks at inside corners usually signal slight movement between adjoining walls. Choose any type of latex caulk and cut the tip just short enough to leave a 1/8-in hole in the end. Squeeze a narrow line of caulk directly over the crack and mold the wet caulk into the corner with a moistened finger. Avoid thick layers of caulk, which may look too rounded in a square corner.
For large holes, cut out a square chunk of drywall around the hole, install backing, add a drywall patch, and then tape the wound. For smaller holes, use a self-adhesive drywall patch.
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Prime the drywall
To prime the drywall, you must first address any flaws or inconsistencies in the wall. Pick away any loose edges of drywall facing paper. Prime any leftover raw paper with a priming paint to seal it. You can use a product like Kilz, which seals well and dries fast. Use a foam brush or rag to dab at the wet paint, wiping away any runs. Once the paint is dry, sand away any remaining paper nubs. If you sand through to expose fresh paper, paint it again to prevent moisture absorption from the taping compound and paint.
Next, apply a drywall compound to smooth out tool marks and fill in low spots. Use a trowel to apply the compound with overlapping vertical strokes. Then, use a knockdown knife to smooth out the surface with a series of vertical and horizontal strokes. Work quickly to prevent the coat from drying.
After the drywall compound has been applied, use a drywall sander to carefully sand ridges and tool marks. Apply light pressure in smooth, circular motions to prevent uneven paint coverage. Wipe away dust with a damp sponge and allow the surface to dry. Inspect the drywall under bright light to ensure a smooth finish. Target any remaining imperfections for additional sanding.
Before priming, eliminate dust remnants from the drywall installation using a vacuum attachment and a clean tack cloth. You can use drywall-specific primers to prevent topcoat problems and create a uniform seal for flawless paint application.
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Seal loose paper with primer
To prep rounded corners drywall for painting, it is important to seal loose paper with a primer. This process helps to create a consistent and flawless finish. Firstly, use a vacuum attachment and a clean tack cloth to eliminate dust remnants from the drywall. This step ensures that the surface is clean and free of debris before applying any primer or paint.
To seal loose paper, there are several recommended products available. One popular option is Gardz, which is effective in sealing torn drywall paper and binding the edges to prevent them from showing through the undercoat and topcoat. Gardz is particularly useful for sealing old paper coatings that are disintegrating or powdery surfaces like degraded plaster. However, some users have noted that Gardz may not work as well as it used to, possibly due to a change in its formula.
Another option is to use a standard sealer/primer like B.I.N. Zinsser Primer Sealer Stain Killer, which is suitable for sealing bare plaster or paper. This product is shellac-based, so ensure proper ventilation during the drying process. While it is effective for bare plaster or paper, it may not be as successful in sealing lifted edges of the paper coating.
For a quick and easy solution, a spray adhesive like Super 88 can be used to seal loose paper. This product dries fast and seals the paper effectively. Alternatively, you can use a regular carpenter glue by smearing it onto the loose paper to create a seal.
After sealing the loose paper with a primer, it is important to fill, sand, and undercoat the area before painting. This process will ensure a smooth and even surface for the paint to adhere to, resulting in a professional-looking finish.
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Frequently asked questions
First, cover the floors, doorways, and vents to protect from drifting dust. Next, use a vacuum attachment and a clean tack cloth to eliminate dust remnants from the drywall. Then, apply a drywall-specific primer to prevent topcoat problems. After priming, use a 1/2-inch nap roller and a nylon/polyester brush to achieve seamless coverage.
You can find rounded corner beads at most home centers and lumberyards. There are two types: all-metal nail-on and metal with a paper face. The no-nailing, paper-face type is more user-friendly and resistant to chipping.
Choose any type of latex caulk and cut the tip to leave a 1/8-inch hole. Squeeze a narrow line of caulk over the crack and mold it into the corner with a moistened finger. Avoid thick layers of caulk, which may look too rounded.
Decide which room is the primary room and which is the secondary room. Bring the primary room colour around the rounded corner and start the secondary colour where the wall resumes its flatness.
Build up the corners with a second layer of compound and use a knife to feather out the edges. Let it dry overnight and repeat until the corners are smooth. Sand ridges and tool marks with a drywall sander and wipe away dust with a damp sponge.
