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01 May 25

How to paint UPVC windows

And how I saved thousands on my renovation

When we first bought our house, I knew straight away what had to go first. It wasn’t the kitchen (although that came later), it wasn’t the bathroom (that got sorted too)… it was those bright, blindingly stark plastic white UPVC windows. You know the ones… practical yes, but completely wrong for our late Victorian cottage farmhouse. There was something uncomfortable about the way they contrasted with the beautiful hand-cut clay tiles, not to mention the colour clash with the butter cream render.

We bought our house for the garden, the view, and its potential. It was not an architecturally stunning home, but it also wasn’t listed, so we knew we could knock it around to improve things. I started by getting a quote to switch the plastic for real timber or heritage aluminium, but the quote came back at £16,000 to replace them, and that was back in 2017! It was a hard ‘No’ from my then husband Tom, who, being a builder, is only too au fait with the high maintenance of wood windows that need repainting every 3-5 years. He also made a very valid point on an environmental issue. It’s fundamentally wrong to put perfectly functioning windows into landfill just because I don’t like ‘the look’, he argued. I’ve managed to persuade him around every design idea in the past, but just couldn’t get past this one. He was immovable. And annoyingly, probably right.

There had to be a solution. When the budget is tight, I always say ‘it’s time to get creative’ and honestly, it turned out to be one of the best decisions I’ve ever made.

outside of a cottage and green lawn

AFTER: The exterior of the house was re-rendered in a dark grey and all the white windows painted to match. I used Little Greene’s All Surface primer, followed by a top coat of Lamp Black acrylic eggshell.

 

english cottage

BEFORE: The bright white plastic windows looked wrong against the hand-cut clay tiles and cream render.

The simple DIY product that changed everything

So with the windows not going anywhere, I picked up a paintbrush and got stuck in. Yes, really… I painted them! And you can too. The absolute key to unlocking this marvellous revelation is using the correct product. 

The magic ingredient? An all-surface primer. That’s what helps the paint stick to the UVPC like a dream. I used Little Greene’s All Surface Primer for my exterior windows, which has the added benefit that it can be tinted to match your top coat colour. There are other Universal primers on the market, Zinsser 123 comes highly recommended, and comes in a white or dark grey colour, so again, pick which is closest to your top coat colour choice. Just double check that whichever primer you choose, it works with UVPC, as common primers are wood, metal and masonry only.

After giving the frames a really good clean with a cloth and some washing-up liquid, and making sure they were 100% dry and dust-free, I went straight in with the primer. It only took one coat as it covers really well. I then followed this up with two coats of Little Greene’s exterior acrylic eggshell. The exciting part was ofcourse choosing the colour, because the great thing about this method is you can choose anything within the colour mixing system. I chose Lamp Black, which is an almost black colour, but with a warmer grey undertone. We were also getting rid of the butter cream colour for a dark grey render, and I wanted the windows the meld away rather than pop out, because I wasn’t sure I wanted to draw attention to them. I needn’t have worried as they honestly looked so good painted. We hand-brushed them rather than sprayed the paint, as this gives it a lovely soft textured finish, which again helps trick the eye into thinking they are wood windows rather than plastic. 

outside of an english cottage and garden

It’s worth noting that painting your UPVC windows may undermine any warranties you may have. Also, painting them a very dark colour could mean the plastic will warp in the sun, as black UPVC windows have extra strengthening bars in them. However, I was happy to take the risk as these were old windows. However, 5 years on, they haven’t warped and look as good as the day I painted them.

So with the success of the makeover outside, I turned my attention to the interior…

 

blue window of a bedroom with floral wallpaper

UPVC Windows primed in  Zinsser 123  followed by Acrylic Eggshell in Southwold by Sanderson

It was almost like I was possessed. Now that I knew how easy it was to paint the UCPC windows, I needed to banish their tacky white plastic-ness from the rest of the house. I love painting woodwork and details in with my colour schemes, and in my view, the windows look more convincing if you paint them a specific colour other than an off white colour- although I have done that in the bathroom and kitchen. It’s not much of a colour change, but it means the white matches with the wallpapers I’ve chosen.

UVPC windows painted in Silver flake acrylic eggshell by Sanderson.

UVPC windows painted in Silver flake acrylic eggshell by Sanderson.

The trick is one coat of All Surface Primer and then match the top coat into your decor scheme, whether that’s matching in with the wallpaper, colour drenching or contrasting with it, you decide. This is what I love so much about this process; your windows are now part of the colour scheme.

 

black internal office window against a vibrant maximalist interior theme

Windows primed in All Surface Primer , then painted Lamp Black both by Little Greene. 

 

aubergine coloured windows and walls in a maximalist snug living room

Snug windows painted in Little Greene’s  Cordoba

Years on and still looking fabulous

More than four years later, and I’m still smiling at those windows every time I pull up outside my house. I’m seriously impressed with how well they have held up. No chips, no cracks, no bubbling. Even after soaking rain, howling storms and that almighty heatwave we all moaned about… they have stayed in top form. Just looking as good as the day I painted them. Now look, they will need painting at some point, unlike naked UVPC windows that are literally maintenance-free, I expect the paint to fail eventually. But it’ll just take a quick rub down, another lick of paint, and they’ll be good to go again. Unlike timber, that swells and contracts due to temperature, the UVPC is a much more stable substrate.

The key to success towards a heritage look is that the hand-brushed finish gives them a lovely texture that completely hides their plastic past. Friends often can’t believe they’re UPVC!

Perhaps the biggest achievement was painting the entire interior of the UVPC conservatory. Again, it was something I’d earmarked for demolition when we bought the house, but years down the line we never found the budget to do our extension, so I decided to keep it. With a handy can of paint and a lovely soft blue colour, it looks like one of those expensive garden rooms you see advertised in the weekend supplements!

 

green conservatory with fabric sails for curtains

UPVC conservatory windows painted Celestial Blue by Little Greene

The questions I get asked the most

Did you paint the handles?
Absolutely. I primed and painted them just like the frames, and they’ve held up beautifully. 

What about the white bars inside the glazing?
Honestly, you barely notice them. Unless you get right up close and squint, they completely fade into the background once the frames are a darker colour.

Any regrets?
Not a single one. Though just a heads-up… painting your windows could void the manufacturer’s warranty, so do check if that matters to you. For us, it didn’t, especially since they’ve needed absolutely no maintenance.

Would I do it again? Without a doubt

This simple trick saved us nearly twenty grand, let me be creative with colour and totally transformed the vibe of our home. It felt super satisfying to know I could change something that bugged me without spending a fortune or replacing everything. However, I’d love to paint the exterior of our UVPC conservatory, but its south-facing and I do worry that if I painted it black it could warp which could result in leaks. Now that would be expensive to replace! If anyone has any experience painting a conservatory a dark colour, please let me know.

So if you’re stuck with bright white plastic windows that leave you cold, with a lick of paint, you could save yourself a fortune and end up with something you truly love.

If you do give it a go, watch this video on my Instagram and… I’d love to see your before and afters!

yellow upvc painted window with blue and white striped blind

Window painted in Ming Gold by sanderson

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This is where you’ll find extraordinary fabrics,  wallcoverings, breathtaking joinery, sculptural lighting and decorative details that make your heart skip a beat. Budget takes a back seat and unbridled creative ambition takes the wheel.

What I loved most this year was the sheer diversity of design. From full-fat maximalism to serene minimalism, every room had its own unique story to tell. Yet a common thread emerged: retreat, cocooning and comfort. Rich deep colours, layered super soft textures and immersive spaces designed to help us slow down and escape the noise of modern life.

Here are a few of my favourites. The exhibition runs until the end of the month and I can highly recommend a visit. I never wanted to leave.

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The fabulously talented @liagoldinteriors joins me to share her highlights from the show, her high speed creative process and the deep friendships she made on the show. 

Look out for her new collection  with @nexthome which drops tomorrow and stay tuned for her podcast launching next month with @jonniknightdesign called ‘Until design do we part’

And let’s all like round here for an Italian supper club full of her maximalist colour and flair! 

Congratulations Lia. Can’t wait to see what you do next x
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The world of interiors is so much bigger than the traditional design studio which is why I’m not a fan of gatekeeping. I want more people to discover the confidence, joy and magic that comes from creating beautiful spaces, and TV while it always aims to entertain first, has the power to inspire millions to get involved.

I have nothing but admiration for the contestants who put themselves out there on one of the biggest platforms in British television. To share their creativity, ideas and vision and put themselves up for being judged, not just by the judges but everyone sat on their sofas at home takes real courage.

Tonight, one designer will be crowned the winner. But in many ways, the most exciting part starts now. Interior Design Masters has launched many successful careers in interior design, styling, content creation,  product design and television, and I can’t wait to see what these finalists go on to achieve.

I’m incredibly proud to play a small part in this journey.

Tune in tonight on BBC One and iPlayer, then join me here tomorrow at 7pm LIVE when I’ll be interviewing the winner!

So tell me… who’s your money on? @liagoldinteriors and @shaginterior will be joined by @jonniknightdesign and @bensmithinteriors  which i’m so beyond excited to see return! Wishing  them the best of luck!
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Another consistent theme was designs that felt in deep conversation with heritage and culture while making something that felt completely alive and of the moment.

I came home absolutely bursting with inspiration and a renewed appreciation for the transformative power of great design. It’s open until 2 July, so if you’re in London, do yourself a favour and go - soak it all up. Your creative batteries will thank you and a portion of every ticket goes to United in Design, which is doing brilliant work opening up the industry to underrepresented talent.
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From bold colour palettes and clever layouts to unexpected design details, each designer approached the challenge in their own unique way. I’m decoding the colour schemes and highlighting the ideas I think were particularly clever.

But the best part of the show? We never all agree! Did you agree with the judges’ decisions this week? Let me know in the comments below…

And if you missed the show you can catch up on @bbciplayer. And next week the FINAL and I’m thrilled to announce I will be interviewing the winner live HERE on Instagram the day after the show. ⭐️
May you were magnificent! 1. wearing green. 2. May you were magnificent! 

1. wearing green. 
2. celebrating @chattyman 50th
3. @sophieabbottartist open artist house
4. Daytime Dancing at @brightonsundae 
5. New moon meditation at @alexadecastilho 
6. Artists pin board at @sophieabbottartist open house
7. Bought a painting! @beckyblairartist 
8. Visited @rhschelsea 
9. Enjoying Brighton Festival 
10. Lunch at home
11. Time out in my hammock
12. Dad turns 81
13. Love my Mum and bro @edwardrobinsonid 
14. Lucy in a heat wave
15. Working at my desk in a bikini 
16. working out with @teamyo_weight_training @charlottetsw 
17. Sea swimming with @beckyblairartist @sophieabbottartist 
18. My ❤️
19. Keeping cool watching the wildlife 
20. sunsets
I love nothing more than entertaining at home and I love nothing more than entertaining at home and this weekend we were blessed with the most gorgeous weather to celebrate my brilliant dad’s 81st birthday. My brother cooked the most glorious food, and I brought the colour - naturally! - with the table laying. I am obsessed with tablescaping and for this one I layered floral motifs throughout, mixing my Dahlia Bunch fabric from @harlequinfw with my classic Willow Bow china that only comes out for special occasions, armfuls of flowers from the supermarket and my Moroccan cups and jugs and my napkins from @mollymahonblockprinting It was so easy to put together and I love it because I think it’s the colour that creates the visual feast, while my brother brought all the yummy food.
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I’ve decoded the key takeaways in this week’s carousel. Which design was your favourite?

your quarter finalists: 
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@emmely 
@shaginterior 
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