Best Underlay for Underfloor Heating: Carpet & Laminate

Your first question: Do I need Special Underlay for Underfloor Heating?

If you want to protect your carpet from foot traffic and keep it looking nice and new, then underlay is vital.

It is also important to spend time looking for the right underlay for your carpet underfloor heating, as some can stop the heat from getting through, which is a waste of money.

Here is the best product currently on the market for underfloor heating.

Duralay King Low Tog Carpet Underlay
The Duralay King also has a high density which absorbs the shock from foot traffic so that your carpet doesn’t have to. This is what prolongs the life of your carpet.

Duralay King Low Tog Carpet Underlay

Watch our video on Duralay King for Underfloor Heating

12,000 views: View the transcript here

The best product for allowing the heat through your carpet and into your home is the Duralay King. Its low tog gives this underlay excellent thermal conductivity, but this is not its only benefit.

It also has outstanding impact noise reduction, with a rating of 42db. This will dramatically reduce the sounds of heavy footfall in your home.


The duralay king is the best on the market for conducting heat. It is also easy to handle which makes fitting a breeze.

What are the best products for laying laminate flooring over underfloor heating?

Duralay Heatflow Laminate Underlay


The Duralay Heatflow is specially designed for laminate flooring. Its incredibly low tog makes it perfect for underfloor heating.
Duralay Heatflow Laminate Underlay

A product like the Duralay Heatflow underlay offers significant impact noise reduction and includes Thermylin for better heat conduction. This product works well with floating laminate, solid timber and engineered wooden floors. Subject to proper use, it also comes with an impressive guarantee for the serviceable lifetime of the floorcovering under which it is laid.

The other professional approach is to use the Quick Therm Underfloor Heating Underlay. This option is specially designed for underfloor heating and is particularly recommended for use in rooms with high traffic and works with low-temperature underfloor heating systems (maximum heating temperatures of 45°C.)

Quick Therm Laminate Underlay

Buy Quick Therm Laminate Underlay for your underfloor heating

The Quick Therm laminate underlay has outstanding durability and a low tog rating for excellent thermal conductivity.

Quick Therm Laminate Underlay

Other benefits of the Quick Therm include:

  1. The high density poly-foam material absorbs shock from foot traffic and gives this underlay outstanding durability that will protect your flooring and prolong the life of it.
  2. This product also offers good impact noise reduction which will reduce the sound of foot traffic from floors above.

There is a question you may be asking yourself:

Do I even need underlay when laying underfloor heating?

Of course it depends on the top flooring you use but if you’re going to be laying either carpet, laminate or wood flooring, then you definitely need to be using underlay. Not only does it help prolong the life of your new floor but it will help you get the most out of your new investment.

So you’ve been told you need a special underlay for your underfloor heating…

It’s true, there’s important considerations to make when choosing what to buy.

By far the most important is on TOG rating (i.e. the warmth/insulation). You need one with a very low tog rating so that the heat can travel up through the underlay and onto your feet.

If you want to know more about TOG, have a read of this:

Highest & Lowest Tog Rated Underlays

But don’t let that be all.

There’s other features and benefits that are important too. As long as you have the right tog rating.

Why should I put laminate flooring over my underfloor heating?

This benefit of this kind of synthetic floor covering is that it resembles high-quality wood finishes while still being stain and scratch resistant. It’s also easy to lay and there’s a wide variety of options available. If you’re considering using laminate in combination with underfloor heating, then there are a few considerations.

• Heat from the underfloor system needs to be spread evenly with no hotspots that could cause conduction or quality issues.
• The laminate must be laid as close as possible to the subfloor. If there are gaps between the layers, the flooring may suffer from drying out.
• The room should be kept at a humidity of around 60% during and after installation.
• Be aware that beech and maple floors react more dramatically to heat so will experience more movement than other species.

Laminate flooring offers a sleek, easy and affordable way to create a sleek finish to your home’s living areas. It’s also highly adaptable so yes, providing you make good choices, you can lay underfloor heating beneath it. In fact, it’s among the best options for a wood finish as solid wood flooring will dry out and shrink in reaction to heat. This may lead to the creation of gaps.

what are the benefits of underlay for underfloor heating

Will PU Foam Work?

It’s right that PU Foam underlay is now becoming much more popular than rubber underlays. However, more often than not, these have a much higher tog rating than rubber made products so the chances are you would choose rubber over pu foam.

So now you know that, it is much easier to decide which product to buy.

It’s important that you’ve decided whether you will lay carpet, laminate/wood as a top floor because you will need different products depending on this. And will usually come down to personal preference.

For example, carpets can use thicker underlay because they often need a softer feel to them. Whereas for laminate and wood it needs to be thinner because you will be looking for a much firmer feel underneath

This article will take you through the key things to consider when choosing which underlayment to use in your home

Does it have to be something special for underfloor heating?

Underfloor heating is a big investment which is a great way to keep your home warm and cosy all year round.

It is important to know that you don’t have to choose between having underfloor heating or underlay, in fact it is highly recommend you fit both under your flooring.

Not only will underlay allow heat to easily travel into your home, it will also protect your flooring and prolong the life of it.

If you want to know the many other benefits to installing underlay with underfloor heating and the best products on the market, then keep reading.


Does perforated underlay work best for underfloor heating?

Perforated underlay is a fantastic choice for underfloor heating as its structure has been specially designed for optimum thermal conductivity.

Our recommendation for a perforated underlay for laminate flooring is the Quick Therm. Other factors that also contribute to its excellent thermal conductivity are its high quality poly-foam material and low tog of 0.35.


Which underlay is best for engineered wood?

Combat plus laminate and wood underlay


The Combat Plus laminate and wood underlay comes with a built-in water repellent feature to protect against excess moisture. Its low tog also makes it a perfect product for underfloor heating.
Combat plus laminate and wood underlay

The Combat Plus can be used for many rooms in the house, including those with engineered wood flooring.

The low tog rating allows excellent thermal conductivity so heat can easily travel through your floor and keep your home warm and cosy.

Its other benefits include:

  1. The versatility of this product is outstanding as it can be used for domestic use or contract use with heavy footfall.
  2. Its noise reduction of 19db will do a good job of reducing sounds from footsteps.
  3. The built in water-repellent feature protects against excess moisture. This is perfect for rooms that are prone to accidents and spills, such as the kitchen.

 Why underfloor heating is the modern alternative

Many homes across the country are deciding to invest in underfloor heating, sometimes an alternative solution to traditional heating, in the form of gas radiators and electric heaters.

The purpose of this is underfloor heating can save you a lot of money because it is seen to be a more efficient way of heating a home.

Because heat rises, heat is able to evenly distribute itself across the room, heating it more quickly and allowing the room to feel cosy without spending a large amount on gas bills.

The second reason for the popularity in underfloor heating is that it can appear a much more modern way of decorating your home.

Rather than worrying about chunky radiators and unsightly gas heaters, you can simply have underfloor heating installed in your floor, so nobody would be any the wiser about how you heed to this room.

It's safe to walk on, to play on and can be friendlier for the children to be around. It is completely controllable via a thermostat, much like traditional heating methods. Underlay will allow the heat flow technology to do its job in a much more reliable and durable fashion.

By choosing underlay from a specialist, you know that you will be investing in quality that is going to last for many years to come. There is no point investing in underfloor heating technology if you're not going to protect the technology and fit it properly the first time round!


Video Transcript for Duralay King: Do I Need Special Underlay for Underfloor Heating

Are you looking to lay carpet over underfloor heating?

Then Duralay King is definitely the choice of underlay for you.

The reason you need this between your carpet and underfloor heating is because it has the lowest tog rating of 0.8.

That means the heat will travel through the underlay and carpet meaning you get the most out of your investment.

And the thickness of 8.3mm means you get great comfort while prolonging the life of both your new heat installation and fresh carpet.

That’s not all..

Other qualities that make it the best on the market for underfloor heating include its brilliant bounce back properties.

Yes, the Duralay King has a better density than other products that may have been designed for use with underfloor heating.


Can the Duralay King be used under laminate or wood flooring?

Unfortunately this underlay is too thick to use if you’re laying laminate or a wooden floor.

So if you’re not having carpet, then you probably want to choose the Duralay Heatflow product. It’s  a much thinner option and can also be found on the Underlay4u website.


Here’s a quick reminder of the properties of the Duralay King

A thickness of 8.3mm

A very low tog rating of 0.8

A roll size of 11m2 high durability and a good nominal density

Thanks for watching

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