Render or spray UPVC Windows. Which one do I need to do first?

It is generally recommended to have the house rendering done first, and then have the UPVC windows sprayed afterwards. This is because rendering is typically a messy process, involving the application of wet plaster or other materials to the exterior of the house. If the windows were sprayed first, there is a risk that the rendering process could damage or stain the freshly painted surfaces, leading to additional cleanup or touch-up work. By completing the rendering first, you can ensure that the window frames are protected during the messy work, and that the newly sprayed surfaces are not at risk of damage. Once the rendering is complete and has had a chance to dry, you can then schedule the UPVC window spraying to achieve a smooth, clean finish. Of course, it's always a good idea to consult with your contractor to confirm the best order of operations for your specific project, as there may be unique factors to consider in your situation.

from a plastering perspective i would always say rendering first. Get the messy jobs out the way before any sort of decorative finishes. Once the render is complete it pretty straight forward to tape up and cover the new render. best wishes

I would recommend spraying your windows first as you wouldn't render before fitting new windows would you? Plus you are more likely to get over spray on the render than render on the windows all you need to do is tape it correctly, you would have to cover the windows at least six foot all around to avoid overspray witch is time consuming.

Spray windows first then cover windows in cardex and polythene and other protection to eliminate scratch damage from render but depending on how good each tradesman is it could be done vice versa

Have the render work done first and then the window frames sprayed.