Underfloor Heating With No Screed

What "no screed" actually means

Screed is the layer of sand and cement, or a liquid pour, that goes over the top of a wet underfloor heating system to hold the pipes and spread the heat. With a traditional water system you lay the pipes, pour screed over them, then wait for it to set before you can lay your floor.

A no-screed heating layout avoids embedding the heating in a traditional deep screed. It still needs a suitable subfloor, insulation or rigid base and any floor-specific underlay, overlay or adhesive. Follow the complete fitting guidance for the chosen finish.

Why avoiding screed matters

Screed is the part of an underfloor heating job that wrecks renovations. It is the reason a lot of people give up on warm floors. Here is what it brings with it:

• Floor height. Screed adds real depth to your floor. In an existing room that eats your headroom, fouls your door swings, and leaves a step between rooms.
• Drying time. Traditional screed can take weeks to dry before you can lay your floor or even heat it. Your room is out of action the whole time.
• Mess and disruption. It is a wet trade. Mixers, hoses, dust, and a room you cannot use while it cures.
• Cost. The screed itself, the labour to lay it, and often a digout to make room for it all add up fast.
• Renovation risk. Ripping up a finished floor to lay screed is a deal breaker on most retrofits. It turns a simple upgrade into a building job.

If you are renovating, working over an existing slab, or fitting a floating floor, screed is the thing standing between you and warm floors. Take it out and the whole job gets simpler.

Water and electric no-screed options

Both water and electric heating products can offer low-profile or dry constructions. Compare the actual layers and installation requirements rather than relying on a no-screed label.

Water-based systems can use routed dry panels as well as screed. They require suitable pipework, a manifold, controls and a heat source. Check the complete product system and its floor-height requirements.

Ribbon heating has no water pipework or manifold. Its thin mat is one layer within the finished floor construction; some floor finishes still need rigid preparation or an approved levelling layer.

How the EkoBuild Ribbon does no-screed electric

The 1.8mm Ribbon mat has a nominal output of 150W/m² and is controlled by a suitable thermostat. Fit it with the insulation or rigid preparation, protection and floor layers specified for the chosen finish.

A broad heating layout helps distribute warmth, but usable heat output and the room’s heat loss determine whether a system can be the main heating. Cable, water and ribbon products all need an appropriate complete design.

Does no screed mean less heat?

This is the worry that stops people, and the answer is no. The screed in a wet system is not magic. It is just a way of holding pipes and moving heat. Skip it and you lose the depth and the drying time, not the warmth.

Insulation can reduce downward heat loss, but the appropriate insulation depends on the floor construction. Therm-All is a soft product for suitable floating-floor constructions; tile and stone need an appropriate rigid insulating or backer base. Confirm the selected products before fitting.

Running cost depends on the fitted mat area, electricity tariff and actual thermostat on-time. At 150W/m², each square metre uses 0.15kWh for a full-power hour. Multiply that by your unit rate and measured or assumed on-time; an assumed duty cycle is a scenario, not a predicted bill.

Which floors it goes under

Because there is no screed, the ribbon can be used with approved floor finishes:

• Compatible carpet and low-TOG underlay, with heating output checked against room heat loss
• Laminate and engineered wood
• Vinyl and LVT
• Stone and tile

A dry heating layer can suit renovations and compatible floating floors. Carpet, laminate, wood, vinyl and tile each need the appropriate complete construction and flooring manufacturer’s approval.

How it's fitted

Plan the exact floor construction, whole-mat layout, controls and electrical supply before installation. Do not cut the mats. Arrange a qualified electrician for electrical design, protection, testing, connection and commissioning, and follow the supplied fitting instructions and flooring manufacturer’s requirements.

What no-screed underfloor heating costs

Taking screed out of the job removes a whole chunk of cost: no screed material, no labour to lay it, no digout. What is left is the ribbon and the bits around it. EkoBuild prices are listed by Ribbon length, with free UK delivery on orders of £150 or more:

• 0.5m Ribbon roll from £50 for the shortest 0.5m-wide mat (1.2m long), for rooms with furniture and fixed runs
• 1m Ribbon roll for open floors
• Therm-All insulation for suitable floating-floor assemblies; other finishes need their specified insulation or rigid base

Every ribbon is backed by a manufacturer warranty, subject to AHT’s certificate. Browse the full range in the shop, read the full electric underfloor heating guide, or use the Room Designer to get an exact price for your room.

No-screed underfloor heating FAQs