Why EWI Contractors Across Ireland Trust Cills.ie for Every Retrofit Job
If you're running EWI or external wall insulation projects across Ireland, you already know the pain — standard window cills don't work once you add insulation board to a facade. The reveal closes in, the existing cill no longer projects enough, and suddenly you need made-to-measure aluminium cills that arrive fast, fit right, and look the part.
That's exactly the problem Cills.ie was built to solve.
The Problem with Standard Cills on EWI Jobs
External wall insulation changes everything at the window reveal. Once you're adding 100mm, 150mm, or even 200mm of EWI system to a facade, you need cills that:
Project further to maintain correct drip edge clearance
Match the insulation thickness precisely — no guesswork, no site cutting
Arrive cut to size so your crew isn't wasting time on a scaffold with an angle grinder
Look finished — RAL colour-matched to the render, window frame, or client specification
Off-the-shelf cills from a builders' merchant don't cut it on EWI jobs. They're standard projection, standard colour, and built for standard walls. Retrofit is anything but standard.
What Cills.ie Offers Retrofit Contractors
Made-to-measure, every time. Every cill is manufactured to your exact dimensions — width, projection, length, and end cap configuration. You submit the measurements, we handle the fabrication.
Full RAL colour range. Whether your client wants the cills to match the window frame, the render colour, or a specific architectural spec, we can match it. Every RAL colour available, durable polyester powder coat finish.
Fast turnaround. Retrofit programmes move fast. We manufacture and dispatch quickly so your crew isn't waiting on materials while the scaffold clock ticks.
Flashings and cappings too. Cills.ie also supplies aluminium flashings and cappings — everything you need to finish the window surround cleanly on an EWI system, all from one supplier.
Order in minutes, online. No rep, no phone tag, no waiting for a quote. The Cills.ie platform lets you configure and order your cills online — dimensions in, order placed, confirmation back to you. Over 1,700 contractors across Ireland are already using it.
Designed Around How Irish Contractors Actually Work
Cills.ie was built by people who understand the Irish construction sector. The ordering platform is designed for site managers and project coordinators who need to move fast — not procurement teams with weeks to spare.
You can:
Place orders from your phone on site
Track your job order status in real time
Order multiple cill profiles across multiple jobs in a single session
Get notifications when your order ships
There's no minimum order. Whether you're fitting cills on a single semi-D or running a 40-unit deep retrofit programme, the process is the same.
Common EWI Cill Configurations We Supply
ApplicationTypical Projection RequiredNotes100mm EWI System140–160mmAllows for render finish + drip edge150mm EWI System190–210mmStandard on deep retrofit200mm EWI System240mm+Passive house / NZEB specICF New BuildCustomMatched to block + insulation width
Every configuration is made to order. If your job has unusual dimensions, that's fine — the platform handles custom inputs.
Why Aluminium, Not uPVC or Concrete?
Aluminium is the material of choice for EWI cills for three reasons:
Durability — Aluminium cills won't crack, warp, or discolour under Irish weather conditions. Once they're fitted and painted, they're maintenance-free.
Lightweight — Easier to handle on scaffold, especially on multi-storey retrofit projects.
Precision fabrication — Aluminium extrusions are cut to exact tolerances. You get what you spec, every time.
Concrete cills are heavy and slow. uPVC degrades over time and limits colour options. For EWI retrofit at any scale, aluminium is the professional choice.
Serving Contractors Across All 32 Counties
Cills.ie ships across the island of Ireland — Republic and Northern Ireland. Whether your project is in Dublin, Cork, Galway, Belfast, or a rural retrofit programme in the midlands, we deliver to site.
With over 1,700 customers already on the platform, we're the go-to supplier for Irish retrofit contractors who need reliable, fast, made-to-measure aluminium cills.
Ready to Order?
If you've got an EWI job coming up and need cills, the fastest thing you can do right now is head to cills.ie, enter your dimensions, and get your order placed. No phone calls, no waiting.
Custom aluminium cills. Ordered in minutes. Delivered across Ireland.
