Domakihub How to Paint uPVC Windows and Give Them a Fresh Look
Refresh tired window frames without replacement using the right prep, primer, and paint.
Reviewed by Domakihub home & decor pros · 2026-06-23 · 5 min read
uPVC windows are a practical choice for Greek homes, holiday rentals, and hotels — but after years of sun exposure and salt air, white frames can look chalky and dated. Painting them is far cheaper than replacing them, and with the right materials the result is durable and professional. The video above walks through the brush-application technique in detail; the steps below give you everything you need to plan and execute the job confidently.
Can uPVC windows actually be painted?
Yes — modern direct-to-uPVC paints bond chemically to the plastic surface without needing a separate primer in most cases. The key difference from ordinary paint is flexibility: uPVC expands and contracts with temperature, and a rigid coating would crack within a season, especially in the Greek summer heat.
Specialist uPVC paints (also sold as PVCu paint) are formulated to stay elastic. High-quality 2-pack or single-component products from brands such as Rust-Oleum, Kolorbond, or Thorndown can last eight to twelve years when applied correctly.
When painting makes sense — and when it does not
Painting is ideal for frames that are structurally sound but discoloured, scratched, or simply the wrong colour for a renovation. It is also the right choice for landlords of holiday rentals who need a quick refresh between seasons without the cost and disruption of window replacement.
Skip painting if the frames are warped, cracked through their full depth, or if the seals and mechanisms are already failing — no amount of fresh paint fixes a window that no longer closes properly. In those cases, replacement is the more cost-effective long-term move.
How to paint uPVC windows: step-by-step
- 1
Clean the frames thoroughly
Wash every surface with a dedicated uPVC cleaner or a solution of sugar soap and warm water. Remove all grease, mould, and oxidation — paint will not adhere to a contaminated surface. Pay extra attention to corners and the narrow strips around the glass. Rinse with clean water and allow to dry completely, ideally 24 hours in dry weather.
- 2
Mask glass, hardware, and surrounds
Apply masking tape carefully along the glass edge, leaving no gap between the tape and the frame. Remove or tape over handles, hinges, and any metal strips. Lay dust sheets below the window to protect sills and floors. Precise masking at this stage saves a great deal of clean-up time later.
- 3
Lightly scuff the surface
Use 400-grit wet-and-dry sandpaper (used dry) to give the uPVC a very light key — you are not removing material, just breaking the surface gloss so the paint grips. Wipe away all dust with a tack cloth or a lint-free cloth dampened with white spirit, then let the surface dry fully before opening the paint.
- 4
Apply the first coat of uPVC paint
Stir the paint thoroughly and apply a thin, even first coat using a high-quality foam roller or a soft synthetic brush. Work methodically from top to bottom, keeping a wet edge to avoid lap marks. Expect partial coverage on the first coat — do not try to cover in one heavy pass, as thick coats sag and take much longer to cure. Allow to dry according to the manufacturer's instructions, typically two to four hours.
- 5
Apply a second coat and remove masking
Once the first coat is touch-dry, apply a second coat in the same way. Two thin coats always outperform one heavy coat for both adhesion and finish quality. When the second coat is still slightly tacky — not fully dry — remove the masking tape at a 45-degree angle to get a clean paint line. Leave the windows open (if possible) for 24 hours to allow full cure before operating them normally.
Rather have a pro handle it?
Get a vetted painting pro in your city — one number, booked in EN/EL/DE.
FAQ
- Do I need a special primer before painting uPVC windows?
- Most modern uPVC paints are designed to be applied directly without a separate primer, provided the surface is clean and lightly sanded. However, if the frames are very dark in colour or heavily weathered, a uPVC-compatible adhesion primer can improve coverage and longevity. Always check the paint manufacturer's guidance.
- How long will painted uPVC windows last in Greece's climate?
- With a quality direct-to-uPVC product applied correctly, you can expect eight to twelve years before the colour fades noticeably. The intense UV and heat in Greece do accelerate fading compared with northern Europe, so choosing a paint with a UV-stabilised pigment and applying two full coats is especially important here.
- Can I paint uPVC windows a dark colour?
- Yes, but dark colours absorb significantly more heat, which increases thermal expansion of the frame. This can distort the window if the profile was not originally rated for dark colours — a known issue with older uPVC units. If in doubt, contact the window manufacturer or stick to mid-tone colours. Many installers recommend staying below RAL 7016 (anthracite grey) in intensity for south-facing windows.