Products // PROD_03
Aluminium Capping Specification | Parapet Wall & Secret Fix Detail
Parapet wall cappings, secret-fix and welded corner cappings, and aluminium trims for cladding, windows, doors and EWI systems.
Spec sheet of a parapet capping measured with the Cills app
Overview
Precision Engineered Aluminium Cills
Architectural wall cappings and boundary trims provide the ultimate weatherproofing for parapet walls and cladding boundaries. Fabricated with secret-fix brackets and slide-on joints, they allow for natural thermal expansion while maintaining a seamless, watertight barrier. We fabricate straight runs, internal/external corner units, stop-ends, and T-junctions to order.
This product is configured and priced dynamically. To order this exact detail to your millimetre measurements, please download the Cills app or visit Cills.ie.
Technical Specs
Irish Fabrication & Coating Standards
- 01
System types
Secret-fix brackets, snap-on cappings, or direct-fix configurations
- 02
Expansion jointing
Sliding splice plates with double EPDM seals
- 03
Corners
Fully welded, dressed, and powder-coated corner sections
- 04
Gauges
2mm to 3mm marine-grade aluminium depending on parapet width
- 05
Colour match
Matched precisely to cladding, fascia, or window frames
// Product Feedback
What Contractors Say About Cappings & Trims
Trade-tested reviews for our cappings & trims specifications.
"Superb quality cappings & trims! The Cills app made it easy to specify exact reveal dimensions on site. We saved hours in measuring and fitting."
"Fabricated precisely to our specifications. Ideal thickness for deep insulation reveals and EWI terminations. Delivered to our site within 4 days."
"Excellent finish and total consistency. Fits behind the window frame perfectly with zero rattle or bowing under thermal expansion. Highly recommend for any commercial build."
// Product FAQ
Frequently Asked Questions
How do secret-fix brackets work for wall cappings?
The brackets are fixed directly to the parapet. The capping profile then snaps over the brackets, eliminating visible screws and allowing thermal expansion.
Do I need expansion joints for long runs of parapet capping?
Yes, we recommend a 3-4mm expansion gap every 3 meters, waterproofed using our internal splice plates and EPDM seals.
Are corner cappings welded or jointed?
All internal and external corners are fully TIG-welded and dressed flat in our workshop to guarantee watertightness.
// Complete System
Explore Other Made-to-Measure Sills
Window Cills & Sills
Standard and deep profile aluminium window cills. Made-to-measure. Powder coated. 3D preview before you order. Retrofit and new build ready.
View Specifications →Aluminium Flashings
Custom flashings in any profile for EWI, roofing and weatherproofing. Fabricated to exact sizes, bent and powder coated. Watertight on every detail.
View Specifications →Bay & Complex Cills
Multi-segment bay window cills for irregular, angled and corner openings. Single seamless piece. No joints. No leaks. Designed segment by segment on Cills.ie.
View Specifications →RAL Powder Coating
Any RAL colour. UV-stable, durable finish on every product. Match your facade, your windows, your spec sheet. Preview shades in real time on Cills.ie.
View Specifications →Custom Profiles
Non-standard profiles for specific architectural requirements. Thermal breaks, stop ends, EWI termination details. Contact us before ordering to discuss.
View Specifications →// Get the App
The App That Ends Reorders.
Measure on site. Watch your product build in 3D. Order in minutes. Available free on iOS and Android.
// Core Principle
Cills.ie — Measure. Make. Fit.
// Ready to Order
Order in the App
In Minutes
Configure your made-to-measure cappings & trims in 3D. Delivered nationwide in 3 to 5 days.