I want to lacquer my exterior windows

Which lacquer do I need to paint my wooden windows? Should I lacquer or should I stain? What is the difference between lacquering and staining? Can I still lacquer previously stained windows? Can I also lacquer my PVC or aluminium window frames? Here we will give you all the answers, a step-by-step plan with lots of tips, and some top products that you can use.


First, it's best to cover the glass and the adjoining outer walls with masking tape before you start painting so that you do not accidentally paint them along. If there are shutters on the window, you can remove them to make the process easier. Then comes the most important part of the preparation: making the surface 'paint ready. Any old paint on the window frame that is already cracked or flaking should be removed first. Cleaning and degreasing are also a must for the adhesion of the paint. For new wooden window frames, you can do this with synthetic thinner (but not white spirit, as this leaves a greasy film). Wood that has been painted before can be degreased with water and a dash of ammonia or Berdy Clearline. For the adhesion of the paint, you should also sand and dust the wood. For PVC or aluminium window frames, it's sufficient to clean them with water or detergent. If you use detergent, be sure to rinse well with clean water, so that no detergent remains on the window frame. 

These products can be of interest to you:



Primer for wooden window frames

Apply two coats of synthetic wood primer to your wooden window frames (or shutters). You can also opt for a one-pot system, with which you can both pre-treat and finish. You need three coats of this system in total — a primary coat, an intermediate coat and a top coat (the latter being what would otherwise be step 3). If your windows have been lacquered before and if that lacquer is still intact, then you don't need to apply primary coats, but after the necessary preparation, you can immediately apply the finishing coat (step 3). Two primer coats, three coats of a one-pot system... Do you think this is all a bit much paintwork? If you do, then remember it really is essential, because your finishing coat will only adhere well to a sufficiently prepared and primed surface.

These products can be of interest to you:


Primer for aluminium or PVC window frames

For aluminium or PVC windows, you need to use a multi primer. Just one coat is enough. This protective primer ensures good adhesion of the following (finishing) coat.

These products can be of interest to you:



There, now you can start lacquering. The lacquers you can use are the same for wooden, PVC or aluminium window frames, provided they are properly prepared and primed (or have been painted before). Apply one coat of the lacquer of your choice. If you have been working with a one-pot system, it is now time for your third coat, the finishing coat. After lacquering, you can remove the tape again, replace the shutters if necessary, and you're done!

These products can be of interest to you:



Do I need to lacquer or stain my exterior windows? What is the difference?

In this blog post, you'll find all the information about the difference between a transparent stain, an opaque stain and a lacquer. In short: stains preserve the character of the wood by leaving the wood structure visible, whereas lacquers cover the wood structure completely. Both, however, protect your wood against weather influences. So whether you stain or lacquer depends mainly on your own preference. 


Can I also lacquer previously stained windows?

Stained wood can certainly be lacquered, but you have to sand the wood until the stain layer is completely gone. Then you can simply carry out the above-mentioned step-by-step plan. 


When should I lacquer my outdoor windows again? 

On average, you should repaint your wooden window frames every 5 to 7 years. How often you should paint them exactly depends on a number of factors, which you can read about in this blog post


When is the best time to lacquer my exterior windows?

A good time to lacquer your exterior windows is when it's dry and cloudy. Avoid (bright) sunlight, because paint and sunlight do not go together very well. The sun can cause blisters in synthetic paint, for example. As for temperature, 15 to 20 degrees is ideal. This is also about the temperature that the paint manufacturer's recommended drying times are usually based on. You should therefore also bear in mind that your drying times may vary slightly if you're going to paint at a lower or higher temperature. It's best not to paint at temperatures of -5 or 40 degrees, of course. 



Finally, we'd like to point out a few essential items for when you want to lacquer your exterior windows.

These products can be of interest to you:



Feeling diligent and want to paint your interior windows too? Then have a look over here.

Feeling even more diligent and want to paint your doors as well? Then read on over here.


Good luck!

Any questions, doubts or comments? Feel free to contact us!