Double Aluminium Spreader Plate for Underfloor Heating 40qty


Double Grooved Spreader Plate Box Quantity of 40 390 x 1000 (200mm centres). Omega Groove. Aluminium diffuser plate 0.45 Thickness. For use with 15-17mm Pipe. We recommend using Pert Al Pipes.

In stock


Spreader Plate – Box of 40 Double Groove

Double Groove Aluminium Spreader Plate for underfloor are installed onto suspended floors and fitted on top of floor joists or battens. Because of the 200mm pipe spacing these plates are commonly used with boilers as the heat source. If you require plates with 150mm spacing plates, these are available here – Triple Groove Plate

Double aluminium spreader plate can be nailed, screwed or stapled onto the top of the floor joist or floor batten. The plates can give an output of 77 watts per m² at room temperature 20 degree C. w. But this is subject to many different factors that can vary the output as well and the floor temperature.

A Guide to calculate how many plates you require, multiply your heated floor m2 by 2, this will give you the 80% coverage.

When installing the plate we strongly recommend that the plate sits tightly beneath the floorboards, do that they are in direct contact with the sub-floor offering maximum heat transfer. We highly recommend using Rockwool or similar, which should be fitted directly underneath the plate.

These Aluminium Spreader Plates are one of the most common and most effective ways of having underfloor  on a first floor. These plates can also be used with regroove insulated panel.

For smaller Quantities – Single Plate

For Bulk Order Please Contact the office of 01684 580554 or

Fit From Below Spreader Plates also available – FFB Plate


  • 390 x 1000mm
  • 0.45 thickness
  • Strengthened Aluminium
  • Pipe Spacing 200mm
  • Omega Grooves
  • Fit From Above
  • 20m2 Coverage (approximate)
Aluminium Spreader Plate