How to Paint a Masonry Window Sill

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Woodie's DIY will show you how to paint a masonry window sill. This paint can become flaky and weathered but it's easily fixed.

How to do it

Step 1

Sometimes paint on a window sill can become chalky or begin to flake and look unsightly. This can be rectified quite easily, and if done correctly you can achieve long lasting results. Before starting work lay a dust sheet under the window sill.

Step 2

Remove any flaking paint using a wire brush or rough grit sandpaper. Wipe away any dust with a cloth or brush.

Step 3

If there’s any mould or moss remove as much as possible by scraping and brushing before treating with a fungicidal wash.

Step 4

Mask off any areas that you don’t want to get paint on.

Step 5

To treat a chalky surface, apply a stabilising solution to the window sill using a brush. Leave the stabilising solution to dry for the time indicated in the manufacturer’s instructions.

Step 6

Stir the Window Sill paint thoroughly before starting and use a good masonry brush for painting. Alternatively you can use a standard masonry paint on your sills and follow the same procedure.