Yes. Cork flooring goes over the Ribbon. Click and floating cork planks lay straight over it with no screed. Glue-down cork tiles need a smooth solid surface underneath, so a levelling compound or an overlay board. The one thing to get right with cork is thickness, because cork is a natural insulator.
Why cork works over the Ribbon
Cork gets written off for underfloor heating, and the reason is old cable and water systems. Those run at 40 to 90°C and bury in a screed, so they need to force a lot of heat through whatever sits on top. Put an insulating floor over that and you are fighting the system.
The Ribbon works the other way round. It operates at 27 to 28°C, averaging about 27°C, with the floor surface settling at 24 to 25°C. It has 300% more heating elements per m² than standard cable, spaced 10 to 50mm apart instead of 100 to 150mm, so the heat is spread evenly across the whole floor rather than pushed hard through a few hot lines.
It is 1.8mm thick and needs no screed, so it does not raise your floor level. You insulate the subfloor, lay the Ribbon, then lay your cork over the top.
Which build-up your cork needs
| Click or floating cork planks | Lays straight over the Ribbon, with an underlay rated for underfloor heating. No screed, no battens. |
| Glue-down cork tiles | Needs a smooth solid surface, so a levelling compound or an overlay board over the Ribbon, and an adhesive approved for underfloor heating. |
| Cork underlay under another floor | Counts towards the thermal resistance of the whole build-up. Check it before you add it, because a cork underlay plus a cork floor is a lot of insulation over your heating. |
Thickness is the thing to get right
Cork insulates. That is exactly why it feels warm underfoot and why it is quiet to walk on, and it is also the reason a thick cork floor slows the heat coming through from below.
So keep it thin. Ask your supplier for the thermal resistance figure of the finished floor before you buy, and send it to us with the room size. We will tell you straight whether it still works as primary heat or whether the room wants topping up. It is the same principle as the tog limit on carpet: the heat has to get through the floor to do its job.
This is worth sorting before you buy the flooring, not after. The flooring decision drives the heating build-up and not the other way round.
You do not need a gap around the edges
The Ribbon needs no gap around the edges of the room. It runs right up to the walls.
Your cork boards are a separate matter. A floating cork floor needs the perimeter expansion gap the board manufacturer specifies, covered by skirting or beading afterwards. That gap sits in the flooring layer above the heating, so it takes nothing away from your heated area.
Bamboo is the same conversation
If you are weighing cork against bamboo, the Ribbon runs under both. Engineered and click bamboo lays straight over it up to 22mm thick, and solid bamboo goes on battens. The full detail is on the bamboo flooring page.
Fitting notes
- Insulate the subfloor first with our recommended insulation, so heat goes up into the room instead of down.
- Acclimatise the cork in the room before fitting, for as long as the manufacturer directs.
- Use an underlay rated for underfloor heating, with a low tog. Do not stack an insulating underlay under an already insulating floor.
- Do not cover the Ribbon with extra insulation, foam or boarding. That is a cable and water requirement, not ours.
- Never cut, fold or overlap the Ribbon. If a mat does not fit, change the layout or the mat size.
- Have your electrician test the mats before anything covers them, and make the 240 V final connection under Part P.
Temperature limits
Cork manufacturers set a maximum floor surface temperature. No floor surface should exceed 27 to 28°C.
The Ribbon operates at 27 to 28°C, averaging about 27°C, and the floor surface settles at 24 to 25°C because the heat cools as it passes up through the floor finish. That sits inside the limit rather than against it.
Set the figure from your product datasheet as the cap on the thermostat's floor probe and the floor cannot exceed it.
Can it be the room's main heating?
Yes, with the thickness checked first. The Ribbon runs at 150W per m², and with at least 70% of the floor covered in a suitable room it is designed as the primary heat source rather than a warm surface.
Below 70%, or where the cork build-up is thick enough to hold the heat back, it becomes a supplementary heat source and we spec an infrared panel to make up the gap. Send us the product and the room and we will work it out before you spend anything.
Send us your cork product
Give us the make and the thickness and we will tell you whether it still works as primary heat. Or map the room in the free Room Designer for the layout and the price.
Other floor finishes
The Ribbon runs under every floor finish. Here is the detail for the rest: bamboo, engineered wood, laminate, LVT and vinyl, carpet, and the full flooring comparison.
Under cork flooring FAQs
Can you put underfloor heating under cork flooring?
Yes. Click and floating cork planks lay straight over the Ribbon with no screed. Glue-down cork tiles need a smooth solid surface, so a levelling compound or an overlay board over the Ribbon, and an adhesive approved for underfloor heating.
Does cork block underfloor heating?
Cork is a natural insulator, so a thick cork floor slows the heat coming through. Keep it thin and check the thermal resistance figure of the finished floor with your supplier before you buy. Send it to us with the room size and we will tell you whether it still works as primary heat.
How thick can cork flooring be over underfloor heating?
Thinner is better, because every extra millimetre of cork is more insulation between the Ribbon and the room. There is no single number that fits every product, so ask your supplier for the thermal resistance of the finished floor and we will check it against your room.
Does the heating need a gap around the edges of the room?
No. The Ribbon needs no gap around the edges and runs right up to the walls. Your floating cork boards still need the perimeter expansion gap the manufacturer specifies, but that gap sits in the flooring layer above the heating.
What temperature can cork flooring take?
No floor surface should exceed 27 to 28°C. The Ribbon runs at 27 to 28°C, averaging about 27°C, with 24 to 25°C at the floor surface, so it sits inside that. Set your product's figure as the floor probe cap.
Can you put underfloor heating under bamboo as well?
Yes. Engineered and click bamboo lays straight over the Ribbon up to 22mm thick with no battens. Solid bamboo is fitted on battens, the same as solid wood.