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.

Cavity Wall Construction
ICF Construction
Timber Frame Construction

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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