Painting a room can completely transform your space, but achieving a professional finish starts long before the first coat of paint goes on. Preparing your walls properly ensures your paint adheres well and lasts longer — helping you avoid peeling, cracking, and uneven results.
In this post, we’ll walk you through the steps to prepare your walls for painting, whether you're a DIYer or hiring a professional.
1. Start with a Clean Slate
Dust, grease, and dirt can interfere with paint adhesion. Use a mild detergent or wall cleaner and a sponge to remove any residue. Pay extra attention to kitchens (where grease builds up) and bathrooms (which often have soap scum or moisture stains).
Pro Tip: For tough spots, a solution of water and trisodium phosphate (TSP) works wonders.
2. Repair Holes, Cracks, and Imperfections
Use a filler or spackling paste to patch nail holes, dents, and cracks. After drying, sand the area smooth so it's flush with the wall surface. For larger damage, consider using mesh patches or hiring a professional for drywall repair.
Don’t forget: Even small imperfections can show through after painting — prep is worth the effort!
3. Sand for a Smooth Finish
A light sanding across the entire wall (especially glossy surfaces) helps the new paint adhere better. Use fine-grit sandpaper and wipe down with a damp cloth afterward to remove dust.
4. Tape and Protect
Use painter’s tape to mask off trim, ceilings, baseboards, and adjacent walls. Cover floors and furniture with drop cloths or plastic sheeting to protect from splatters and spills.
5. Prime If Needed
Primer is essential when:
You’re covering dark colours with light paint.
The wall has stains or damage.
The surface is new drywall or bare plaster.
You’re painting over a glossy finish.
Need advice on primer selection? Contact us or visit our Services page to speak with a paint expert.
6. Choose the Right Tools and Paint
High-quality tools and paint make all the difference. Explore Randall’s curated paint collections for durable, premium finishes.
And if you're working with a professional painter, send them to our Painter Order Form — it makes the process seamless.
Bonus: Consider a Colour Consultation
Not sure what colour will work best in your space? Our in-store specialists offer expert guidance to help you choose the perfect shade.
Final Thoughts
Proper wall preparation might take time, but it’s the foundation of a beautiful, long-lasting paint job. Whether you’re tackling the project yourself or working with pros, investing in prep work ensures your paint finish looks flawless and stays that way.
Need personalized advice or supplies? Visit our services page or stop by your local Randall’s. We’re here to help every step of the way.