20mm Plastic Castellated Floor Panel – Underfloor Heating Panel for 16mm Pipe

The 20mm Plastic Castellated Floor Panel is a lightweight, easy-to-install solution designed to securely hold 16mm underfloor heating pipes in place. Featuring a castellated (or knobbed) surface, the raised profiles allow for quick and accurate pipe layout with perfect spacing, making it ideal for screeded UFH systems.

Manufactured from high-strength plastic, this panel is suitable for both domestic and commercial installations. It provides excellent mechanical protection for pipes, ensures even heat distribution, and is compatible with a wide range of insulation layers and screed systems.

Key Features:

• Designed for 16mm underfloor heating pipes
• 20mm panel height – low profile build-up
• Castellated design for quick, accurate pipe positioning
• Suitable for use with screed floor heating systems
• Made from durable, high-impact plastic
• Fast and secure installation – no clips required
• Compatible with insulation layers beneath
• Ideal for residential, commercial, or retrofit UFH installs

Panel Specifications:

• Panel Thickness: 20mm
• Pipe Compatibility: 16mm
• Panel Coverage: 1.00m² per sheet
• Spacing: Pre-formed castellations for consistent 50mm-100mm–150mm-200mm spacing (depending on layout)

Minimum Order Quantity: 35 Panels 

Click for: Product Installation & Data Sheet

Frequently Asked Questions

• What size pipes can I use with this panel?

These panels are specifically designed for 16mm underfloor heating pipes.

• Does it require pipe clips?

No – the castellated design holds the pipe in place without additional clips, making installation faster and simpler.

• Can this be used under screed?

Yes, this panel is designed for screeded underfloor heating systems, providing an excellent base for the pipe layout before screeding.

• What is the overall thickness of the panel?

The panel is 20mm thick, making it a low-profile solution ideal for retrofits or builds with tight floor height requirements.

• How much area does one panel cover?

Each panel covers approximately 0.88m², so you’ll need around 1.15 panels per m² of floor area.

• Can it be installed over insulation?

Yes, it is commonly laid over insulation boards to combine thermal efficiency with structural support for the pipe system.