Aluminium Gutters Direct

All Alumasc Skyline Cills & Closers

Discover our range of Alumasc Skyline Cills & Closers, designed to provide a durable, weather-resistant finish around windows and doors. Manufactured in the UK from premium aluminium, these systems offer excellent corrosion resistance, low maintenance and a sleek architectural appearance for residential and commercial projects. At Aluminium Gutters Direct, we stock genuine Alumasc Skyline Cills & Closers with expert advice, competitive prices and fast UK delivery.

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Not sure which? Call the technical desk 0330 0539354
Alumasc Skyline Aluminium Windowsill - 4 Bends x 3 Metre Length - Aluminium Gutters Direct
Alumasc
Alumasc Skyline Aluminium Windowsill - 4 Bends x 3 Metre Length
From £52.86 £57.82
-9%
In stock
Alumasc Skyline Aluminium Windowsill - 4 Bends x 2 Metre Length - Aluminium Gutters Direct
Alumasc
Alumasc Skyline Aluminium Windowsill - 4 Bends x 2 Metre Length
From £41.35 £45.23
-9%
In stock
Alumasc Skyline Aluminium Closer Channel - 3 Metre Length - Aluminium Gutters Direct
Alumasc
Alumasc Skyline Aluminium Closer Channel - 3 Metre Length
From £31.20 £34.12
-9%
In stock
Alumasc Skyline Aluminium Windowsill Channel - 3 Bends (75x2x30) x 3 Metre Length - Aluminium Gutters Direct
Alumasc
Alumasc Skyline Aluminium Windowsill Channel - 3 Bends (75x2x30) x 3 Metre Length
£29.87 £32.67
-9%
In stock
Alumasc Skyline Aluminium Windowsill - 4 Bends x 1 Metre Length - Aluminium Gutters Direct
Alumasc
Alumasc Skyline Aluminium Windowsill - 4 Bends x 1 Metre Length
From £29.71 £32.50
-9%
In stock
Alumasc Skyline Aluminium Closer Trim - 3 Bends x 3 Metre Length - Aluminium Gutters Direct
Alumasc
Alumasc Skyline Aluminium Closer Trim - 3 Bends x 3 Metre Length
From £29.53 £32.30
-9%
In stock
Alumasc Skyline Closer Channel - 2 Metre Length - Aluminium Gutters Direct
Alumasc
Alumasc Skyline Closer Channel - 2 Metre Length
From £25.47 £27.86
-9%
In stock
Alumasc Skyline Aluminium Windowsill Channel - 3 Bends (75x2x30) x 2 Metre Length - Aluminium Gutters Direct
Alumasc
Alumasc Skyline Aluminium Windowsill Channel - 3 Bends (75x2x30) x 2 Metre Length
£24.72 £27.04
-9%
In stock
Alumasc Skyline Closer Trim - 3 Bends x 2 Metre Length - Aluminium Gutters Direct
Alumasc
Alumasc Skyline Closer Trim - 3 Bends x 2 Metre Length
From £23.76 £25.99
-9%
In stock
Alumasc Skyline Closer Channel - 1 Metre Length - Aluminium Gutters Direct
Alumasc
Alumasc Skyline Closer Channel - 1 Metre Length
From £19.86 £21.73
-9%
In stock
Alumasc Skyline Aluminium Windowsill Channel - 3 Bends (75x2x30) x 1 Metre Length - Aluminium Gutters Direct
Alumasc
Alumasc Skyline Aluminium Windowsill Channel - 3 Bends (75x2x30) x 1 Metre Length
£19.62 £21.47
-9%
In stock
Alumasc Skyline Closer Trim - 3 Bends x 1 Metre Length - Aluminium Gutters Direct
Alumasc
Alumasc Skyline Closer Trim - 3 Bends x 1 Metre Length
From £18.09 £19.79
-9%
In stock
Alumasc Skyline Aluminium Windowsill Union Clip - 4 Bends - Aluminium Gutters Direct
Alumasc
Alumasc Skyline Aluminium Windowsill Union Clip - 4 Bends
From £7.81 £8.53
-8%
In stock

ALL ALUMASC SKYLINE CILLS & CLOSERS · COMMON QUESTIONS

Something not answered here? The technical desk takes calls on 0330 0539354
What do Skyline cills and closers actually do?
Skyline cills and closers form a precise, weatherproof joint beneath windows or cladding and prevent water tracking into the façade.
Do Skyline cills and closers come pre-drilled for fixings?
Yes, cills and closers are supplied pre-drilled to speed up fitting and maintain accuracy on site.
Can cills and closers be made to custom lengths?
Yes, Alumasc manufactures cills and closers to any required length for accurate on-site fitting.
Are fixings for cills and closers included with supply?
Yes, cills and closers are supplied complete with stainless-steel fixings and joint covers.
How do aluminium cills improve façade performance?
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.
What’s the correct method for fixing aluminium cills to prevent distortion?
Install cills and closers using non-ferrous fixings and ensure drip edges are correctly positioned to avoid run-back onto façades.
What’s the best way to avoid thermal bridging under window cills?
Fit insulation breaks or isolating shims under cills to minimise thermal bridging and condensation risk.
How do I inspect cills and closers for wear or seal degradation?
Inspect under-cill drip edges annually and clear debris to stop water staining on façades.