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Understanding underlay

Re-carpeting your home is an exciting and satisfying journey, turning old in to new and refreshing the spaces you live in. However, did you know that what lies beneath the surface is as important as what you see on top.

Yes, we are talking about underlay.

It is the hero of carpet foundation, and it is critical when laying carpet to use a good quality underlay. It is definitely not a step to skip.

This article is here to help you understand what it is and why it is so important.

What is carpet underlay and what does it do?

Carpet underlay is a cushioned layer that is fitted under your carpets. There are various types of carpet underlay available, ranging from foam to rubber to felt, and a combination of recycled materials known as crumb.

Although they vary in their make-up and density, they all essentially perform the same role but which one you choose depends on your specific needs and the type of carpet you're installing.

Underlay is so important for many reasons:

Comfort

The underlay adds another layer of underfoot padding; thinner carpets or carpets in bedrooms may benefit from a thicker, softer underlay to maximize potential for complete comfort.

Underlay extends the lifespan of your carpet

It is not a step you should skip when investing in a new carpet, or you may find you are replacing your carpet sooner than you would like. Underlay protects against wear and tear of heavy footfall and a firm, dense underlay in high traffic area will hugely benefit your carpet.

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It is essential to use underlay on concreate floors as your carpet’s longevity will suffer and the carpet will wear much sooner. Think of it like a decent sole on a shoe.

Underlay also acts as an insulator

It will help keep fuel and heating costs down as is an energy efficient product.

Underlay has sound proofing qualities

It reduces noise and absorbs sounds from daily life like people running and downstairs, children pushing toy cars and things being dropped to name a few things.

Moisture Resistance

If you are installing carpet in an area prone to moisture, like a basement, it's important to choose an underlay that has moisture-resistant properties to prevent mould and mildew growth.

Carpet guarantee

Some carpet companies will not guarantee a carpet without underlay, so it really is not something to avoid investing in.

What are the different underlays?

As mentioned above, although underlays essentially do the same job, there are a variety of types, each being suited to different purposes and locations.

Foam underlay

This is soft and light with excellent insulation and noise reduction properties. It is ideal for areas like staircases and hallways due to it being easy to install.

Sponge Rubber Underlay

It is durable and excellent for sound reduction and is well suited to concrete floors due to its ability to absorb shock. It also works well with underfloor heating systems.

Felt Underlay

Felt underlays are more affordable and easier to install. They offer cushioning, moderate noise reduction, and warmth. Felt is an excellent choice for wool carpets in areas like bedrooms, hallways, or stairwells.

Crumb Rubber Underlay

This is made from densely packed recyclable materials, so is a great option if you are wanting to be environmentally friendly. It is well used in rooms with heavy furnishings as due to being dense, it protects the carpet from indentations.

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Other considerations

Tog Ratings

Carpets and underlay have tog ratings, indicating how well they insulate. The higher the tog ratings the better floor insulation. When you have underfloor heating, aim for a combined rating of less than 2.5 to ensure the efficiency of the heating system.

Durability and Lifespan

Consider the quality of the underlay, as this can affect its durability and lifespan. Higher-quality underlay may cost more upfront but can extend the life of your carpet and provide better comfort.

Fitting

Proper installation of the carpet underlay is crucial. It should be laid evenly across the entire floor, with seams properly sealed and edges secured. Have it professionally installed for the best results.

Cost

Carpet underlay comes in a range of price points. It's important to balance your budget with your desired level of comfort and performance. Investing in a good underlay can enhance the overall performance and longevity of your carpet.

Environmental Considerations

Some underlay materials are more environmentally friendly than others. If sustainability is a concern, look for options made from recycled or sustainable materials.

In summary

When you are choosing an underlay, buy new, don’t reuse it or efficiency will be much reduced. Consider the thickness and quality of the carpet it will be paired with. Keep in mind the purpose too, do you want it to be comfortable underfoot, or for a heavy traffic area. Consider your budget too. All of these factors will determine what you buy. Your flooring specialist will also be able to advise on the best fit underlay for you and we hope you enjoy your new unsung flooring hero!

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