Window Sills
Passive Sills manufacture a large variety of passive window sills to suit every type of construction project.
Click on an image to see more details of the best window sill to use for your project. For a full list of the different window sill dimensions we can manufacture please view the Window Sill Dimensions page.
Why choose Passive Sills
✓ Complies with all building regulations
✓ Best for thermal efficiency
✓ Super lightweight
✓ Quick and easy to install
✓ Lower carbon footprint
✓ Best for manual handling
✓ Competitive cost when installed
✓ 10 year warranty
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