How To Stop Gloss Paint Going Yellow
Yellowed skirting and doors are down to the paint itself and a better choice of gloss keeps woodwork white for years.
The short answer
Gloss paint goes yellow because oil-based gloss oxidises as it ages, and the process speeds up in dark corners and wherever there's heat, steam, cooking grease or smoke. To stop gloss paint yellowing, use a high-quality non-yellowing or fully water-based gloss, let natural light reach the woodwork and improve ventilation in kitchens and bathrooms. Yellowed gloss is best fixed by sanding and repainting.
White gloss looks crisp the day it goes on, but on skirting boards, architraves, doors and coving it can drift to a creamy yellow over time. It's a common complaint with painted woodwork, and it can make an otherwise freshly decorated room look tired.
Below we explain why gloss yellows, the steps that stop it and how we brought a yellowed door back to white during one of our Airbnb renovations.
Why Gloss Paint Turns Yellow
Traditional gloss is oil-based, and as the oils in the paint oxidise over the years, the finish takes on a yellow tinge. How quickly that happens depends on the paint and the conditions in the room.
Darkness is one of the biggest factors. Gloss that rarely sees daylight, such as the skirting behind a sofa, the inside of a cupboard or a door in a windowless hallway, yellows noticeably faster than woodwork in a bright room.
Heat, humidity, cigarette smoke and cooking grease all speed it up too, which is why the woodwork in kitchens and bathrooms is the first to turn. Some timbers and materials react with oil-based paint as well, adding to the discolouration.
How To Stop Gloss Paint Going Yellow
1. Choose A Non-Yellowing Gloss
If you're going to the effort of painting skirting boards, doors or frames, the paint you pick makes the biggest difference. Cheaper oil-based glosses are the quickest to yellow, while a quality non-yellowing gloss keeps its colour far longer, especially in dim areas.
We've used plenty of glosses across our own homes and rentals, and our roundup of the best gloss paints for woodwork includes several non-yellowing formulas.
2. Let Daylight Reach The Woodwork
Because darkness speeds up yellowing, more light slows it down. Daylight can even reverse some of the yellowing on gloss that's discoloured through lack of light, so opening blinds and moving furniture away from skirting helps. It's a slow change rather than an instant fix.
3. Cut Down Steam And Grease
Humidity is a common cause in bathrooms with poor ventilation, where the door, frame, architrave and skirting all turn yellow together. A quiet but powerful bathroom extractor fan clears the steam before it settles, and the walls and ceiling are better protected with a moisture-resistant bathroom paint. In kitchens, a cooker hood vented outside and a regular wipe-down of the woodwork keep grease from building up.
Repainting A Yellowed Door In One Of Our Airbnbs
During a renovation of one of our Airbnbs, we came across a six-panel door whose gloss had turned a distinct yellow. As it was in a spot prone to yellowing, we repainted it with a high-quality non-yellowing gloss rather than another coat of standard white.
The before and after photos show the difference. The door and frame are a bright white again, and the non-yellowing gloss is there to keep them that way.
Does Water-Based Gloss Go Yellow?
A fully water-based gloss is far less prone to yellowing than an oil-based one. The catch is that plenty of paints sold as water-based are hybrids, mixing water-based and oil-based ingredients. These hybrids still yellow eventually, though more slowly than a traditional oil gloss.
Check the tin for a non-yellowing claim from the brand if keeping white woodwork bright is the priority. A water-based satinwood is another option for a lower sheen, and our guide to the best satinwood paints covers those.
Getting Yellowed Gloss White Again
Once gloss has yellowed through age, repainting is the reliable fix. Wash the woodwork with sugar soap, sand it lightly to take the shine off and wipe away the dust. If you're switching from oil-based to water-based paint, use a primer or undercoat suitable for going over gloss so the new coat bonds properly.
Then apply two thin coats of your non-yellowing paint, letting the first dry fully before the second. Our guide to painting satinwood over gloss goes through the prep in more detail.
Quick Questions And Answers
Does all white gloss turn yellow?
Not all white gloss turns yellow at the same rate. Traditional oil-based gloss yellows the most, especially in dark rooms or areas with heat, steam or smoke. Non-yellowing and fully water-based glosses hold their colour far longer, so they're the better choice for skirting boards, doors and frames in rooms that don't get much daylight.
Can you paint over yellowed gloss?
Yes, you can paint over yellowed gloss once it's been cleaned and sanded. Wash it with sugar soap, sand it lightly until the shine has gone and wipe away the dust. Use a suitable primer or undercoat if you're moving from oil-based to water-based paint, then finish with two coats of a non-yellowing gloss or satinwood.
Why has my gloss paint gone yellow so quickly?
Gloss that yellows within a short time is down to the paint and the room. A cheaper oil-based gloss used in a dark hallway, behind furniture, inside a cupboard or in a steamy bathroom or kitchen discolours much faster than a quality gloss in a bright room. Smoke and cooking grease speed the yellowing up even more.
Is satinwood less likely to yellow than gloss?
A water-based satinwood is less likely to yellow than an oil-based gloss, because the yellowing comes from the oils oxidising rather than the sheen level. An oil-based satinwood will yellow just like an oil-based gloss. If your woodwork is in a dim room, choose a water-based or non-yellowing product whichever finish you prefer.
Does daylight really bring yellowed gloss back to white?
Daylight can reverse some of the yellowing on gloss that's discoloured through lack of light, so opening blinds and moving furniture away from skirting helps. It's a slow change rather than an instant fix. Gloss that has yellowed through age is best repainted, and a non-yellowing gloss stops the problem coming back.
Which rooms should I use a non-yellowing gloss in first?
Start with the rooms and spots that see little daylight or a lot of heat, humidity, smoke and cooking grease, because that's where gloss yellows fastest. Kitchen and bathroom woodwork goes first in many homes, and so do doors in windowless hallways. We used a non-yellowing gloss on the six-panel Airbnb door because it was in a spot prone to yellowing.
Do I need a cooker hood to stop kitchen woodwork yellowing?
A cooker hood vented outside helps, because cooking grease speeds up yellowing. Pair it with a regular wipe-down of the woodwork so grease doesn't build up on the skirting, doors and frames. A non-yellowing gloss on the woodwork gives you extra protection in a kitchen where the grease can't be avoided.
How many coats of non-yellowing gloss does a yellowed door need?
Apply two thin coats of non-yellowing gloss and let the first dry fully before the second. Before that, wash the woodwork with sugar soap, sand it lightly to take the shine off and wipe away the dust. If you're switching from oil-based to water-based paint, use a primer or undercoat suitable for going over gloss.
Eddie spent five years as a self-employed painter and decorator before going part time to become one of the main writers at DIY Works. From garden fences to mist coats on fresh plaster, painting and decorating is his speciality.