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Choosing The Right Type of Underlay

To ensure that your new floor will be installed to professional and quality standard, the correct underlay, installation method and accessories should be used. It is understandable if this seems like a daunting task, but our helpful, easy-to-follow guides will provide you with the necessary assistance.


Underlay is a thin layer of cushioning placed between the sub-floor and the floor covering. It is only required when you need sound proofing, a vapour barrier or if you are laying a floating or laminate floor. There are a number of benefits associated with installing an underlay under your new floor;

  • To even out the Subfloor, Minimising slight imperfections.
  • To act as a sound barrier.
  • To work as a moisture barrier (if there is a chance of moisture rising from the subfloor
  • Add a level of insulation
  • Underfoot cushioning


It is a good idea to assess your individual needs against what each of our underlays has to offer.

White Foam - a synthetic product made from thin polyethylene foam. Used for light padding and as a noise barrier when there is no chance of moisture.

Timbertfoil – 2mm thick and suitable for underfloor heating this high quality insulating underlay covers an area of 10m2 per roll. An integrated aluminium vapour barrier protects against dampness and water damage.

Woodtech – a 3mm thick sound barrier underlay is used to deaden sounds not only through the floor but also the airborne sound that comes back into the room. This is a sponge rubber underlay which means that the wood or laminate is not overstrained, allowing for a bit of give under weight. 

Fibreboard – this is a premium, natural insulating under floor board for use with all laminates and glueless woods. Each board is 5.5mm thick which helps with sound reduction, ideal in circumstances where sound reduction is imperative.


Installing underlay under wood could not be easier. There is no need for glues or adhesives as you simply lay the underlay over the subfloor!

Start with a clean, smooth and most importantly dry surface. Unroll the underlay and if it has an inbuilt vapour barrier then it is this side that should be face down on the floor. Rubber underlay should be rubber side down. Ensure the underlay cover the entire floor and about 5cm up each wall.

Any joins or seams should be sealed with a vapour tape. Use a craft knife to remove underlay around obstructions, corners and leave a small gap around pipes. Your new floor can then be installed directly over this. As no adhesive has been used, no time needs to be left for this to set.