About us

Engineering secure entrances since 2014

Thayyil Engineering Industries is an Alappuzha-based manufacturer of rolling shutters, collapsible gates and automatic entrance systems, trading under two brands: Citadel Rolling Shutters and Citadel Automation.

Who we are

Since 2014 we have been designing, manufacturing and installing products that are problem-free, safe and easy to operate. From our base in Alappuzha we serve homes, offices, shops, showrooms, banks, malls, warehouses and industrial parks across Kerala, and supply projects throughout India.

Our Citadel rolling shutters are recognised for fair prices and a wide range of customisable products. Today we are bringing the same engineering to automatic gates, barriers and doors through Citadel Automation.

Thomas Chacko

Managing Director

What we do

Competent advice

Customer guidance is our top priority. Our trained, experienced specialists support you from project planning to final installation and help you choose the right product for your requirements.

Advanced manufacturing

Our products come from careful development and accurate engineering by a skilled team working in close coordination in our own workshop.

Installation and services

Our products suit every architectural style, from homes and offices to store fronts, malls and industrial buildings. Our committed technicians keep supporting you after installation.

How a Citadel shutter is built

A.
Forming the parts
Raw materials are formed and rolled into curtain profiles, channels and components.
B.
Gathering components
Every part for your order is collected and checked against the specification.
C.
In-house assembly
The shutter is assembled in our workshop before it leaves for site.
D.
Site installation
Our team installs the finished product at your site and hands it over.

Gear drive assembly in the Thayyil Engineering Industries workshop — Our workshop, Alappuzha

Built on our own shop floor

Drives, shafts, springs and profiles are prepared and assembled by our own team, giving us direct control over quality, finish and delivery.

Two brands. One engineering team.

Citadel Rolling Shutters is the heart of our business. Citadel Automation brings the same workshop and installation team to gates, barriers and automatic doors.