Why is paint bubbling? We have the answers and how to fix it

Close up of bubbling paint on white wall
(Image credit: Getty Images)

Why is paint bubbling isn’t a question you want to ask once you have finished a paint project. You want a smooth, smart finish that looks good and stays that way. But, if it does happen you’ll want to know why, so you don’t repeat the problem on another paint project.

It can happen whether you’re painting wood or emulsioning walls, so you need to make sure that you get your prep right to stop any ugly blisters appearing. While prevention is the preferred choice, you also need to know how to deal with blisters and bubbles after they happen. Here we tell you what you need to know and do. 

Reasons why is paint bubbling

Steve Jenkins

Steve Jenkins is a freelance content creator with over two decades of experience working in digital and print and was previously the DIY content editor for Homebuilding & Renovating. 

He is a keen DIYer with over 20 years of experience in transforming and renovating the many homes he has lived in. He specialises in painting and decorating, but has a wide range of skills gleaned from working in the building trade for around 10 years and spending time at night school learning how to plaster and plumb.

He has fitted kitchens, tiled bathrooms and kitchens, laid many floors, built partition walls, plastered walls, plumbed in bathrooms, worked on loft conversions and much more. And when he's not sure how to tackle a DIY project he has a wide network of friends – including plumbers, gas engineers, tilers, carpenters, painters and decorators, electricians and builders – in the trade to call upon.