Double Grooved Spreader Plate

£6.95 Incl. VAT

In stock

Free delivery over £250 (Exceptions Apply)
Next Day Available | 30 Day Return Policy
Further Delivery Information

Product Overview

Underfloor Heating Double Grooved Spreader Plate, otherwise known as diffusion or heat emission plates,  for suspended floor constructions, fitting on top of floor joists or battens at the standard 400mm centres. Because of the 200mm pipe spacing these plates are commonly used with Boiler systems. If you require Triple Groove Plates these are also available. Plates are also commonly referred to as diffuser plates or trays.

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

When installing the underfloor heating spreader plates double we strongly recommend that the plate sits tightly beneath the floorboards. This is so 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.

The Metal heat transfer plates for underfloor heating are one of the most common and effective ways of having an underfloor system on the first floor.  Spreader plates double groove aluminium can also be used with regroove insulated panel.

How many plates do I require?

To calculate how many underfloor heating joist plates you require, multiply your heated floor m2 by 2, this will give you 80% coverage.

Heat Spreader plates also available:

For Box Quantities – 40 x Plates

Fit From Below Spreader Plates also Available – FFB Plate

Double Grooved Spreader Plate Specification

  • 390 x 1000mm
  • 0.45 thickness
  • Strengthened Aluminium
  • Pipe Spacing 200mm
  • Omega Grooves
  • Fit From Above

Delivery Information

We have multiple delivery options

  • Next Day Carrier
  • Delivery From Branch 1-5 Working Day
  • Pallet -1-3 Days
  • Standard 1 -3 Day Carrier
  • Economy 1-3 Day Carrier
  • Click & Collect from store


The cost of the carriage will be displayed before your final checkout. Free delivery is available on most items for orders over £250, exceptions do apply.

Click And Collect

Please note that our stock levels are not live. Please contact your local branch prior to purchase, so that we can ensure the product is available to you. If the product isn’t available, we can organise this through an alternative branch.


  • Orders will only be dispatched and delivered on weekdays.
  • Orders for the next working day delivery must be placed before 2 pm, this gives us time to pick and pack before the carrier arrives to collect.
  • We aim to dispatch all carrier delivered items within 48hrs, and all items delivered on our own transport within 5 days, Monday to Friday. Saturday Delivery can be made upon request, depending on availability.
  • An email will be sent when your goods leave us via Carrier, this email will include tracking information. If your order is delayed for any reason, we will contact you.
  • If delivery is from a Branch, then a member of our team will be in contact with you.


We pride ourselves on our customer service, but mistakes can happen. If you receive an incorrect or faulty item, please notify us within 30 days to arrange a refund, return or exchange.


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