Window sills from Passive Sills are very easy to install. They can be installed both as traditional window sills or retrofitted to existing sills.
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Passive Sill Installation
Over Sill Installation
This 8 Step installation guide will take you through the process of installing our Over Sill product. Our window sills can also be installed as a standard stone window sill. Click the link for a PRINTABLE VERSION of the Over Sill installation guide.