Supreme Moisture-Resistant Loft Boards (Pack of 3)

The Best Chipboard Loft Board in the UK

These Supreme Moisture-Resistant Loft Boards are the highest quality chipboard loft board panels for sale in the UK and are available exclusively from LoftZone. What’s so good about them? Well, they have a smoother finish than the loft boards you get from DIY stores, they look and feel stronger and stiffer, and the tongue is stronger and less likely to break. They are also officially rated as “P5”, which is a higher rating than on most boards from DIY stores, which means that they are load bearing and also suitable for use in both dry and humid conditions

Just like all our loft boards, the panels have been designed with tongue and groove on the long edges, allowing the panels to slot into one another for a secure fit and easy installation.

Features and Benefits

  • 1220 long x 320 wide x 18mm thick (the 320mm width includes the tongue; the assembled laid width is 310mm)
  • Each panel weighs 5kg (so 15kg for each pack)
  • Tongue-and-groove on the two long edges, for rapid and easy installation. There is no tongue-and-groove on the two short edges.
  • Ultra smooth surface
  • Responsibly sourced FSC® Certified
  • CE-marked
  • This board is classified as “P5” which means it is load bearing and can be used in both dry and humid conditions. Its bending strength is at least 152kg per square centimetre (so 20% stronger than the 18mm chipboard loft boards that you find in DIY stores).
  • Made in the EU.


Most companies that sell moisture-resistant loft boards either colour them green, or sell them only in larger sheets. We don’t believe that many people want green floors, so we have only coloured the inside green, so you’ll never see it from the outside. And we sell them in these handy small loft board sizes. As far as we’re aware, that makes this product unique!

Note that we only sell these boards in packs of three. The price shown is therefore for one pack of three boards. Please ensure that you order the correct number of boards.

Screws are not included and we sell these separately via the link below. We recommend 4x40mm wood screws. Each loft board panel needs a minimum of three screws each, though you may choose to use up to six screws per panel for added strength if you wish.

Please remember that, these days, all loft boards should be raised above the joists in order to protect the full depth of loft insulation, as compressing the insulation with boxes or boards halves its effectiveness. We sell StoreFloor and StoreFloor Compact products that allow you to do this.

We have the biggest range of loft boards in the UK – check out all the others on our shop.

Delivery Info. & Reviews (please read before ordering to understand the restrictions on delivering this heavy product).


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Loft boards are heavy and need to be shipped on a pallet. Therefore, we will only send boards bought on this website to mainland England, Wales, and southern Scotland, and we charge a flat shipping cost of £40, for up to 51 packs of boards. If you live elsewhere or want to order more than 51 packs, then please contact us for a delivery quote.

Also, if you are ordering a LoftZone StoreFloor or StoreFloor Compact kit or parts at the same time as these boards,  for which postage is £12, then we put these kits or parts on the same pallet, so effectively you are only paying £28 extra for the board delivery.

Finally, the tongue (the part that sticks out) of these panels is strong when inserted into the next board but can be a little bit fragile in transit and can occasionally get damaged. If you go to a DIY store, you will see that about 10% of the tongues on their loft board panels have some damage. We pack our boards much more securely than they do, but if some have minor damage on the tongue upon arrival, then please be assured that this will not affect the strength or appearance of the overall floor, since the tongue is hidden inside the groove and cannot be seen once installed.



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