3 reason why you should paint an undercoat on Plasterboard before a top coat

Why Priming Plasterboard Makes All the Difference

You’ve picked out the perfect paint colour, rolled up your sleeves, and you’re ready to transform your plasterboard walls. But before you leap straight to applying that topcoat, there’s one crucial step that shouldn't be skipped—painting an undercoat. Think of it as the unsung hero of painting. It may not be glamorous, but its magic lies in how it helps you achieve a flawless, professional finish every time.

Let’s chat about three reasons why priming your plasterboard before a topcoat is an absolute game-changer. Spoiler alert: if this step isn't already in your routine, you'll want to make it a must-do by the end of this read!

1. It Creates a Smooth, Even Surface

Raw plasterboard is notoriously thirsty. It soaks up paint unevenly, leaving behind patchy spots and a poor-quality finish that will have you regretting skipping that undercoat. An undercoat acts as a preparatory layer, sealing the porous surface and ensuring your topcoat goes on like a dream.

Take Haymes Ultracover, for example. This multi-use primer isn’t just a quick fix—it’s a pro-approved solution for filling tiny imperfections in plasterboard. Its excellent filling and sanding properties leave your walls smoother than a scoop of vanilla ice cream. Whether you’re working on a feature wall or a whole-room makeover, it gives your topcoat the ideal canvas it deserves.

2. It Enhances Paint Adhesion

One of the main villains in the world of DIY painting is poor adhesion. Without the right primer, your topcoat may bubble, peel, or flake when applied to plasterboard—especially if the walls have been exposed to moisture or grime. An undercoat like Ultracover ensures superior adhesion, practically locking your paint onto the surface.

This undercoat is even versatile enough to be used with water-based or oil-based paints. It acts as a bridge, helping your topcoat stay snugly in place and ensuring your hard work remains beautiful for years. Think of it as matchmaking for paint—bringing your dream colour and surface together in perfect harmony.

3. It Gives a Longer-Lasting, More Vibrant Finish

Imagine investing time, effort, and money into painting, only to have the colour fade or look dull before its time. That’s where the third benefit of priming plasterboard comes in—it enhances the vibrancy and longevity of your paint. By sealing stains and evening out the surface, an undercoat ensures your topcoat maintains its true colour and sheen.

Haymes Ultracover’s excellent gloss holdout really shines here. It locks in your plasterboard’s imperfections, preventing any stains or discolourations from showing through and dulling the paint. The results? A striking, show-home quality finish that looks fresh for ages, no matter what life throws at it.

Let’s Wrap It Up: Why You Shouldn’t Skip the Undercoat

Painting an undercoat on your plasterboard is more than just an extra step. It’s the secret ingredient for smoother surfaces, better adhesion, and a vibrant, long-lasting finish. Without it, you risk uneven patches, poor durability, and a colour that doesn’t truly pop.

If you’re wondering where to get started, Haymes Ultracover makes it simple. It’s water-wash-up friendly, blister-resistant, and low in VOCs, making it an environment-conscious choice without compromising quality. Whether it’s for a sunny family room or a hardworking kitchen space, this undercoat has your back.

So, next time you’re gearing up for a painting project, don’t miss this crucial step. Your plasterboard—and those admiring the final results—will thank you! See you in store to pick up your tin today!

Happy painting,

Candeece