All Alumasc Skyline Cills & Closers

Skyline cills and closers form a precise, weatherproof joint beneath windows or cladding and prevent water tracking into the façade.

Yes, cills and closers are supplied pre-drilled to speed up fitting and maintain accuracy on site.

Yes, Alumasc manufactures cills and closers to any required length for accurate on-site fitting.

Yes, cills and closers are supplied complete with stainless-steel fixings and joint covers.

Precision-cut aluminium cills control drainage and prevent staining below windows. Their integral drip grooves direct rainwater clear of the structure, extending the lifespan of brickwork and render.

Install cills and closers using non-ferrous fixings and ensure drip edges are correctly positioned to avoid run-back onto façades.

Fit insulation breaks or isolating shims under cills to minimise thermal bridging and condensation risk.

Inspect under-cill drip edges annually and clear debris to stop water staining on façades.