Skip to content
UK's #1 Underfloor Heating Company - Over 300,000+ Systems Sold!
Consumer Trade
Trustpilot
Get a free quote

BLACK FRIDAY BONANZA – INCREDIBLE UP TO 50% OFF ACROSS SITE! 🔥🔥

BLACK FRIDAY BONANZA – INCREDIBLE UP TO 50% OFF ACROSS SITE! 🔥🔥

Days
Hrs
Mins
Secs
Water underfloor heating is durable and reliable

Water Underfloor Heating Between Joists Or Suspended Floors

Water underfloor heating systems can be effectively installed between joists or suspended floors, providing an efficient heating solution for properties when solid floors are not an option. This method involves running water pipes between your floor joists, which allows heat to rise evenly through the floorboards, creating a comfortable and warm environment. The system is ideal for renovation projects, older properties, or where maintaining the existing floor structure is important. By utilising the space between joists, this installation method offers an energy-efficient heating solution without significantly affecting floor height or requiring major structural changes.

Spreader Plates
  • Aluminium spreader plates are fixed to joists with screws or nails.
  • Plates have 16mm pre-formed grooves set at 200mm centres for ProWarm™ European Standard Pex-Al-HDPE pipes.
  • Batons are installed on the sides of the joists, about 70mm from the top, if joists are deep enough.
  • 50mm foil-faced insulation (e.g., Celotex or Kingspan) is cut and placed onto the batons.
  • Pipework is clipped directly into the grooves of the spreader plates for optimal heat distribution.
Shop spreader plates
In-Joist Batten
  • These innovative boards combine the functionality of both spreader plates and insulation in one system.
  • The 50mm thick XPS insulation panels feature pre-formed grooves at 200mm centres to hold the pipes.
  • The entire board is coated with aluminium foil to ensure even heat distribution across the floor above.
  • In a standard installation, batons are fixed to the sides of the joists about 70mm from the top.
  • The boards are then placed on top of the batons, and the pipes are clipped directly into the pre-formed grooves for easy installation.
Shop In-Joist Batten
ProFloor
  • ProFloor pre-grooved panels allow underfloor heating pipes to heat the room efficiently.
  • Ideal for timber suspended floor structures with joist spacings of up to 400mm centres.
  • The system uses pre-grooved flooring panels specifically designed for 16mm pipes.
  • ProFloor Panels help reduce both material costs and installation time.
  • Installation is quick and straightforward, requiring no additional adhesive and eliminating the need for extra drying time.
Shop ProFloor