Sealant work around window frames: why is it so important?
Sealant joints around a window frame may seem like a small detail, but they are one of the most important spots for preventing moisture damage and wood rot.

The function of sealant
Sealant fills the joint between the frame and the wall, or between parts of the frame, so that water cannot get in. A weathered or peeling sealant joint is often the direct cause of wood rot at that spot.
Maintaining sealant joints
At every painting job, we check and, where needed, renew the sealant joints, so the window frame is fully windtight and watertight again before we paint it.
DIY, or better to have it done?
With the right preparation and materials, some parts of window-frame maintenance can be done yourself, especially for small-scale, easily accessible work. Where it gets trickier — working at height, uncertainty about the condition of the surface, or work that causes more expensive damage if done wrong, such as wood rot or damp problems — it's wise to have a professional painter take a look before you start.
Not sure what's sensible for your situation? During a free, no-obligation assessment we give honest advice: sometimes a touch-up is enough, sometimes a more thorough approach is needed. That advice is free and non-binding, even if you decide to do it yourself.
What affects the cost
Naming a specific figure for window-frame maintenance is difficult without knowing the situation: the surface area, the condition of the surface, accessibility and the number of coats together determine the price. Poorly maintained work needs more preparation — such as wood repair or extra sanding — and therefore weighs more heavily than the painting itself.
Want to know what this means for your situation? After a free, no-obligation assessment you'll receive a clear, concrete quote, so you don't have to guess based on a generic price per square metre. See also our full breakdown of what determines the cost of painting.
Which service this relates to
This topic mainly relates to window frame painting, wood rot repair. Below is what this service involves and what you can expect from our approach.
- Window Frame Painting — Wooden window frames freshly painted, including repair of minor wood damage.
- Wood Rot Repair — Damaged woodwork restored through wood repair or targeted replacement.
Why choose Painting Company
Painting Company has now completed over 1374 projects and serves more than 261 VvE's, with a team of 14+ permanent painters and an average Google rating of 4.9. For questions about window-frame maintenance, you can count on experience that goes beyond loose knowledge from the internet — we apply this in practice every day.
As part of CrumBouw and GoedkoopSteigerHuren.nl, we also have the knowledge, experience and resources to look a step further than just the paint layer: from structural repair to arranging scaffolding, should your situation call for it. Still unsure about your own situation after reading this article? Feel free to request a free, no-obligation quote, and we'll think it through with you.