Carpenter Ultra Step 9mm Carpet Underlay


Manufacturer Carpenter
Noise Reduction 40 db
Tog Rating 2.51


Committed to using top British manufacturers


ULTRA STEP Carpenter 9mm for Hall, Stairs & Landing


Thickness: 9mm
Warmth Rating: 2.51 tog
Noise Reduction: 40db
Density: 180kg/m3
Roll Dimension: 15m2 (11m x 1.37m)


You are currently viewing a placeholder content from Default. To access the actual content, click the button below. Please note that doing so will share data with third-party providers.

More Information


How thick, How Dense & Which rooms is the Ultra Step 9mm for?

The Carpenter Ultra Step is a 9mm carpet underlay. Although this isn’t as thick as the Tredaire Sensation or the Ultimate Living 10mm it is still a good thickness that will provide firm cushioning between your carpet and subfloor.

The 9mm thickness protects your carpet by absorbing shock from foot traffic, as without the presence of underlay this shock would be absorbed by the carpet. Overtime this would damage the carpet and cause it to deteriorate at a faster rate. The addition of underlay greatly prolongs the life of your carpet and keeps it in great condition.

The Carpenter Ultra Step has a very high density of 180kg/m3. This is one of the highest density’s you can find on the market and is partly the reason for it being a slightly higher price. This is another contributing factor as to why this underlay does such an outstanding job of protecting your new flooring.

A high density is ideal for very high foot traffic and will absorb shock efficiently from frequent and heavy use. It is beneficial for those who want to keep their carpets in great condition even when they have busy households with high foot fall.

For the above reasons, this premium carpet underlay is suitable for any area of the home but only perfect for the stairs, hall and landing. These areas receive the most concentrated foot traffic, which is why a high density is required. Thickness is also important, but this alone won’t absorb all the shock.

The Carpenter Ultra Step is specially designed to combine thickness and density to create the ideal product for the stairs, hall and landing.

We also have many customers using this as an all-rounder for the whole house when looking to purchase large quantities of the same product. This would be ideal for busy households, commercial use or light contract use.


How will the Ultra Step 9mm help with Insulation?

The Carpenter Ultra Step has a warmth rating of 2.51 tog. This will make a big difference in retaining the heat in your home, as it will help prevent hot air from escaping through the floor. This is an investment that will save you money in the long run as you will benefit from savings on energy bills.

Although there are warmer products available, such as the Cloud 9 Cumulus which has a tog rating of 3.1, it still offers a good level of insulation.

A high level of insulation is not usually required on the stairs, so it is best to invest in a high density underlay rather than looking for high insulation.

If you are using this product throughout the whole house, the 2.51 tog rating will still provide warmth, which is why this underlay can be used as an all-rounder.

It is important to note that this underlay is not suitable for underfloor heating. The heat needs to travel through the underlay to conduct through your flooring, and a high tog rating may prevent this. A low tog rating is required for underfloor heating. See the bottom of this page to find suitable products for other needs.


Ultra Step 9mm Sound Reduction properties

The Carpenter Ultra Step has a sound reduction rating of 40db, which is a high rating that will make a big difference in your home. For contract use, there are other products with a higher sound reduction rating, such as the Tredaire Colours Red which has a rating of 46db.

For domestic or commercial use, the Carpenter Ultra Step is ideal for reducing the sound of footsteps, walking, jumping or dropping objects.

Sound reducing underlay is for rooms that have space underneath them, as it helps prevents the sound from travelling through the floor. This is especially popular for apartments as it creates a lot more peace and quiet for the rooms below.


How it feels: Quality vs Value

The Carpenter Ultra Step is a premium underlay as it has one of the highest density’s on the market. Although it is a slightly bigger investment then some of our other carpet underlays, such as our own Underlay4U 9mm for stairs, it is still great value for the benefits you receive.

If you are buying underlay to protect your carpet and greatly prolong the life of it, this is the product for you. It will save you money in the long run as you won’t need to replace your carpet as soon as you would without underlay or perhaps a lower density product.

For domestic, commercial and light contract use this is a great investment for those wanting maximum protection for their flooring but also require a good level of comfort.


What’s the Ultra Step 9mm made of and who makes it?

The Ultra Step 9mm is made of high quality PU foam. This material is hugely popular for underlay as it has so many benefits for your home and carpet.

It is lightweight, easy to handle and fit, incredibly durable and resilient against wear and tear. These are the ideal qualities for underlay and are what allows it to do such an outstanding job of protecting your flooring.

Another benefit of this material is that it’s made from recycled materials, which not only is it good for the environment, but it also allows manufacturers to offer PU foam products at a lower price.

A higher density product will undoubtedly weigh more. However, because it is made from PU foam as opposed to rubber it is extremely easy to handle.

The 9mm also means it is easy to fit around the individual steps so you can achieve an amazing finish once you lay your chosen carpet over the top.

This underlay is manufactured by Carpenter, which is one of the largest producers of comfort cushioning products. They specialise in creating underlays that are both comfortable and durable and have been providing consumers with innovative products since 1948.


Related Products

It’s true that the Ultra Step is slightly more expensive than our other product options for stairs and landing.

So here’s a couple of other options you could choose…

Underlay4u Magic 9mm

The Magic 9mm is the cheapest option and often purchased by homeowners who are planning on renting their house to tenants. Head over to the Magic 9mm for stairs to find out more of the benefits of choosing this type of underlay.

Read more about the Magic 9mm

Carpenters 9mm RichStep

Another option for the stairs is the Carpenters RichStep 9mm. This is your mid-range option for the stairs. It still has a high density and is 9mm thick PU foam so is very easy to handle.

Read more about the Carpenters RichStep 9mm

The only product that comes close to the density of the Ultra Step is the Ultimate Living 10mm.

Bear in mind that the extra thickness can sometimes make it more difficult to fit round the steps but it still gives an amazing finish and protection to the carpet.


Underlay for other needs

Duralay King for Underfloor Heating


If you’re installing underfloor heating, you need a product that will conduct the heat through to your feet. Otherwise you will lose the benefits of the installation. If you want more information about underfloor heating, visit our blog post titled best underlay for underfloor heating to find out more details.


Read more about the Duralay King for underfloor heating



Additional information

Weight N/A
Sound Reduction





On Stairs, Heavy Use

Square Meterage

1 Sq mtr, 5 Sq mtr, 10 Sq mtr, 15 Sq mtr, 20 Sq mtr, 25 Sq mtr, 30 Sq mtr, 35 Sq mtr, 40 Sq mtr, 45 Sq mtr, 50 Sq mtr, 55 Sq mtr, 60 Sq mtr, 65 Sq mtr, 70 Sq mtr, 75 Sq mtr, 80 Sq mtr, 85 Sq mtr, 90 Sq mtr, 95 Sq mtr, 100 Sq mtr