Carpenter Deep Step 11mm Carpet Underlay


  • A premium underlay primarily suited to rooms where comfort is key but sound reduction is your highest priority
  • It has the highest sound reduction rating of all the PU foam underlays
  • Also has a good insulation rating but not quite as high as our Midas 12mm (3.26 tog)
  • Easy to fit onto either a wood or concrete sub floor.
  • A superb foam underlay that’s easy to lift, cut and handle for fitting yourself or being installed by a carpet fitter
  • 100% recycled and manufactured in Britain by Carpenters UK


Manufacturer Carpenter
Noise Reduction 46 db
Tog Rating 2.78


Committed to using top British manufacturers


Manufacturer : Carpenters
Thickness: 11mm
Roll Width: 1.37m
Roll Length: 11m
Thermal Resistance: 2.78tog
Impact Sound Improvement: 46db
Density: 125kg/m3
Weight: 20.1kilo per 15m2.


How thick, how dense and which rooms is the Carpenter Deep Step for?

The density of the Carpenter Deepstep density is 125kg/m3. The density means that it is easy to cut and handle as it can easily be cut with scissors. So, perfect if you’re fitting it yourself.

How dense do you want your carpet underlay to be? (this will depend on how much traffic is walking through).

Do you want your feet to have extra comfort in to the carpet?

It can be used in most areas of your property. This underfelt is perfect for the lounge, and luxurious rooms where you want comfort underfoot.

The underlay is still fairly firm to walk on but still has the feel of a super soft underlay, supporting your carpet.

The Deepstep is suitable for areas of comfort and relaxation such as bedrooms, lounge, play rooms but also for a more luxury feel. It is guaranteed for the lifetime of the carpet. The material is made of recyclable products and is recyclable at the end of its life.

Many research hours have gone into the product to bring you a durable, luxury underlay for your living rooms, bedrooms and any area of comfort in your home.

How insulated is the Carpenter Deep Step Underlay?

The Deepstep has a tog rating of 2.78tog. Meaning it’s great at keeping the warmth in the home.

The Deepstep has high heat properties, which does mean that this product is not suitable for underfloor heating.

Carpenter Deep Step Sound Reduction Properties

The sound reduction properties of this underlay are rated at 46db. Here’s what that means.

Impact noise, such as thudding and stomping from noisy kids or from other apartments will be kept to minimum when travelling through the house or building.

The deep Step has one of the best acoustic properties on the market. Note, this is usually measure by weighted reduction of impact noise, such as thudding and stomping. As opposed to airbourne noise.

So, it will help reduce the noise coming through the floor boards from the master bedroom or even the children’s bedrooms.

While the sound reduction isn’t quite as high as the Tredaire Colours Red, it does still have one of the best on the market.

How it feels: Quality vs Value

The Deepstep has a Scrim with fibreglass woven top, this ensures that the underlay has a more rigid backing

The Carpenter Deep Step is part of the superior range. It’s the range for you, if you want a high-quality underlay to go under your carpet. To help eliminate the cold, noise and to prolong your carpet. These underlays are the best on the market

All underlays have different properties. Choosing the right underlay will depend on your preferences and needs, whether it’s keeping the warmth in, reducing impact noise, or extra thickness for comfort.

For example, the Deepstep. Or do you want a firmer feel underfoot? For example, the carpenter ultimate living underlay. Stairs are best for a 9mm Underlay to be able to manipulate the underlay around the stairs.

The other benefit for Deepstep is that it will protect your carpet from premature wear.

What’s Carpenter Deep Step Made from and who makes it?

Carpenters is a UK based company. All products are made and despatched in the UK. They are known for the quality and care of the products made and are devoted to making the best product possible for great prices.

How to lay the Carpenter Deep Step Underlay

To lay the carpet underfelt if you put the plain side down and the ‘scrim’ top at the top this will help glide your carpet across easier and secure the carpet down.

Remember extra thickness needs to be measured with your carpet in relation to your doors.

If you place your order before 2pm you can choose next day. Our courier service is DX Freight between 7am – 6pm. You will receive a text message and an email on the day of delivery.

Additional information

Weight N/A
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

Sound Reduction

Very High




Off Stairs, Medium Use