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FAQs   

Storage

Therma-Foil should be stored on a flat dry surface in its bag, out of direct sunlight, until it is ready for installation.

While this information is presented in good faith and believed to be accurate Robert S Maynard Ltd. and its distributors have no control over installation design, installation workmanship, accessories, materials or condition of application. Robert S Maynard Ltd. does not guarantee results from reliance upon such information and disclaims any liability from any loss or damage arising form its uses.

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What goes under the solid wood flooring?

Therma-Foil is often used as a preferred insulation underlay which also helps moisture passing from your old floor to your new one. Therma-Foil works particularly well under woods that are machined with locking systems like laminates or use steel clips to join them together.  

 

Why do I need Therma-Foil under wood/laminate flooring?

The main reasons for putting Therma-Foil down is to insulate the floor – to stop the cold coming through and to reflect the heat back into the room whilst reducing noise and supporting the wood/laminate flooring.  If no underlay, or an inadequate underlay, is put down, the joints on the laminate flooring can be put under too much pressure and start to break, which can result in the flooring coming apart.

 

I’m taking up the carpet and replacing it with a wood/laminate floor. Can I just leave my carpet underlay in place?

No, carpet underlay is designed with comfort in mind, whereas laminate requires a different type of underlay that performs an entirely different and specific task.  Therma-Foil is ideally suited as a laminate underlay as it will support the joints of the floor and reduce noise and provide thermal insulation.

 

Why use Therma-Foil under Carpet underlay?

Carpet underlay is very important for when you are having your new carpet. Carpet underlay provides added softness to the carpet, improves sound insulation, improves heat insulation, absorbs the weight of furniture to prevent marks and helps against general wear and tear. I think it is safe to say, underlay is definitely a helpful thing to have!

 

Benefits of Therma-Foil

Therma-Foil gives added thermal protection when placed under the carpet – a carpet underlay is still recommended and the Therma-Foil should be placed under the carpet underlay – foil-side up so as to reflect the radiant energy back into the room.
Therma-Foil placed on top of concrete hard sub-floors helps reduce the cold coming through to the carpet.
Indentations from furniture will be eliminated or significantly reduced where the carpet is fitted on a firm underlay and the Therma-Foil is laid beneath.  We would therefore recommend a stiffer or higher density carpet underlay which gives much more support in heavy wear areas as the carpet pile is effectively squashed against the sub-floor, accelerating wear and appearance changes.

 

Can Therma-Foil be used as insulation for a concrete floor?

Therma-Foil is widely used for laying on top of concrete floors and provides an excellent thermal insulation barrier for such application and prevents the transfer of heat through the underlay. It reduces cold air transferring through the underlay from the concrete floor.

Concrete floors have quite a lot of moisture in them and this can be transferred to the laminate therefore damaging it over time.  If you wish to lay laminate over a concrete floor, Therma-Foil is impervious and therefore it can act in a similar way to a damp proof membrane (DPM).

 

What goes under the laminate/engineered flooring?
Laminate is fitted as a "floating floor” it is not fixed down at all. In most cases engineered wood and solid bamboo floors are fitted as floating floors.  
The final feel of the floor is very much dependent on the subfloor it is fitted on. Uneven sub-floors will result in bouncy floors, and in most cases manufacturers have very strict guidelines on subfloor flatness.  

Therma-Foil will to some extent level minor bumps and dips.

 

Can I have an engineered floor on top of floorboards?

Yes, using a Therma-Foil as an underlay. If laying in the same direction as the floorboards then lay hardboard first.

 

Can I have an engineered floor on top of concrete?

Yes, using Therma-Foil underlay on top of the concrete. This is not to be confused with the damp proof membrane in the concrete. We suggest that you have both.  For those that live in flats or apartment blocks there are building regulations, lease agreements and simple consideration for others that can influence your choice of floor.

As a general rule, if you have anyone living underneath you then you have a duty to ensure that you minimise the amount of noise that is transmitted through the floor – using Therma-Foil will help you achieve this noise suppression.

The only way that this can be done is by floating an engineered hardwood floor on top of Therma-Foil.

 

What is the difference between sound insulation and sound absorption?
When airborne sound arrives at the surface of a wall or floor, some of it is reflected back as an echo, and some of it is transmitted. The remainder is converted into other forms of energy within the material, principally heat. This is known as sound absorption.

When airborne sound arrives at one surface of, for example, a floor, some of it is reflected back as an echo, some of it is converted into other forms of energy within the material of the body, and the remainder is transmitted through the material to be radiated as airborne sound on the other side, but at a reduced level.

The degree to which this reduction takes place is the sound insulation provided by the floor. Therma-Foil consists of millions of tiny air bubbles which absorb this sound/energy thus reducing the noise impact particularly under solid/engineered/laminate wood flooring.

I live in block of apartments with wooden floor boards, I want to install a new floor using floor boards to create a new surface, can I install Therma-Foil in between and if so how can I fix it to floor boards beneath?

Our Therma-Foil is recommended for use under floating floor installations such as laminates also where there is no direct fixing to the sub floor required. If you intend to use an underlay under your new floorboards to reduce the impact sound reduction qualities we suggest that you could also fix the Therma-Foil to the floor boards beneath using a stable gun.

 

How do I lay the Therma-Foil?

    • Ensure the substrate is dry, clean, secure and flat enough to receive the wood or laminate flooring.
    • When measuring and laying the Therma-Foil, make sure you leave a 5mm excess to run up the wall.   You can always cut it down afterwards but you can’t add more once you start tapeing/stapleing it down.
    • Once the Therma-Foil is down and covers the desired area, we suggest you use gaffer tape and tape all the joints and press firmly in place.
    • Lay the wood flooring, trim the underlay and then fit the skirting boards over the floor to neatly cover the expansion gap.

     





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