Under Window Cill Flashings
Under Window Cill Flashings
Item Specifics

Product Details
Steel Under Window Cill Flashings
Our Steel Under Window Cill Flashings are designed to seal and protect the gap beneath windows and other openings in steel‑clad buildings. Installed beneath the window cill and over the cladding, these flashings create a clean, weather‑resistant finish while preventing water ingress behind the sheet profile.
Supplied in 3m lengths, each flashing can be easily cut to size on site to suit the exact width of your opening. Manufactured from durable 0.7mm galvanised steel, they provide long‑term corrosion resistance and a neat, professional appearance for commercial, agricultural and domestic buildings.
A full range of coating options is available, allowing you to match your under‑cill flashing to surrounding trims and cladding for a consistent finish. These flashings are an essential part of any weather‑tight cladding installation.
Key Features
- For windows and other openings
- Seals the gap beneath the window and over the cladding
- Supplied in 3m lengths and cut to size on site
- Manufactured from 0.7mm galvanised steel substrate
- Available in galvanised, polyester, plastisol GraniteHDX and Corro-Print finishes
- Provides a clean, weather‑resistant finishing detail
- Suitable for commercial, industrial and domestic buildings
Typical Applications
- Steel‑clad buildings requiring weather protection beneath windows
- Commercial and industrial units
- Agricultural sheds, workshops and machinery stores
- Domestic outbuildings, garages and garden rooms
- Any project requiring a protective under‑cill flashing
Need a Custom Size?
We can customise these cills to suit your specific project requirements. Please contact our sales team for more information and pricing.


