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Castellation Mat Systems

Our Castellation Mats are extremely versatile and are a popular choice for installers due to how fast they can be installed.

The mats lay down and clip together, so they are even easier to manage single-handedly. The castellation mats are interconnecting, pre-spaced at 50mm, with each mat covering 1.12m² and can be used with any kind of screed.

What’s unique about the Castellation Mat system?

With the Castellation Mat system pipe can be designed and installed at 45° angles, not just 90° angles which helps provide increased flexibility, especially when installing in irregular shaped rooms.

For added peace of mind, we use high temperature rated PEX pipe, rated at 98°C at 10 bar, rather than PERT pipe which is only rated at 65°C. Plus, PEX pipe is WRAS approved, so it can also be used elsewhere on your project for potable drinking water.

Buy from Clockwork UFH

At Clockwork UFH, we prioritise the use of dependable products. We source components from trusted manufacturers known for their durability and efficiency, ensuring the longevity and performance of our installations.

Underfloor heating offers practical benefits such as comfort, energy efficiency, and improved aesthetics. If you’re considering underfloor heating for your property, choose Clockwork UFH for reliable, efficient, and stylish heating solutions.

Easy to install
Pre-spaced 50mm
Perfect for irregular shaped rooms
Can be used with any screed
Castellation Mat size: 400mm X 800mm
Castellation Mat depth: 20mm
Requires PIR insulation – Minimum depth 45mm with 100mm suggested
Castellation Mats can be stapled to insulation to secure and prevent lifting
Can be plugged and screwed onto a solid floor i.e. concrete
Pipe Size: 16mm
Maximum Loop Length 100m
No damp proof membrane (DPM) required, although we do recommended one with a 1200 gauge
We recommend AL-PEX pipe to use with this system
Generates outputs of up to 122w/m²

Plan, Insulate, Heat and Screed
Our 4 Step Process


Planning & design


Lay insulation


Install underfloor heating


Pour liquid floor screed

See What Our
Customers Say

“From our initial consultations to the flawless installation, Clockwork’s team demonstrated not just technical prowess, but a nuanced understanding of architectural essentials.

Their underfloor heating system effortlessly merged into our designs, preserving every ounce of spatial aesthetics while embedding an unperceivable, yet palpably comforting warmth throughout the residence.

In Clockwork, I found more than a solution provider; I discovered collaborators who understand, respect, and enhance the architectural journey. Their integrative approach, precision, and unyielding commitment to quality have made them my go-to partners for all underfloor heating needs.”

D. Smith
Architect, Cheshire

Finish your Project

Our sister company Clockwork Screed are screeding specialists, perfect for underfloor heating, they offer a full service, meaning they source, deliver and install your screed and/or floor insulation all from their dedicated mobile screed factories.