Internal Stud Wall Insulation

Stud wall insulation is ideal for providing an extra layer of thermal insulation. It helps to better regulate the temperature of your house, and is more energy efficient, too.

What are Stud Walls?

When you add new walls to your home’s interior, you generally have two choices – solid walls or stud walls. The former are necessary for load bearing walls, but the latter are ideal if there is no significant weight to bear.

A stud wall is made using a simple timber frame and plasterboard, and they’re often used to split larger rooms into smaller ones. They can help you get more out of the space, and are commonly used in renovations. The beauty of stud walls is that they’re relatively easy to both install and remove - making them the optimal choice.

What is stud wall insulation
Warm Home

Why do I Need Stud Wall Insulation?

When making changes to the foundation of your home, stud walls are the perfect solution. This is because they’re quicker and more affordable to install than their alternatives.

However, if you’re considering stud walls instead of solid ones, it’s vital that you consider using stud wall insulation to insulate the area. You don’t want to end up with a cold and uninviting space during the winter, or one that you can’t keep cool in the summer.

The solution? Stud wall insulation. Internal stud wall insulation brings about many benefits, with the main one being that it helps you better regulate the temperature of your home. Keeping you warm in the winter and cool in the summer.

Spray Foam

Spray foam is applied in large quantities using a pressure spray application. It’s an excellent choice for adding to existing insulation to finished stud walls, around obstructions, and in areas with irregular shapes.

Spray foam stud wall installation is quicker and easier to use than its alternatives, and you’ll get a seamless air barrier and high U-Value.


Traditional batt forms of insulation slump over time and create air gaps, causing the U-Value to drop, and its efficiency to deteriorate.

In light of this, our experts recommend avoiding loose-fill traditional batt insulation products for your stud wall. Instead, to utilise the benefits of stud wall insulation, foam insulation should be the first choice.


Generally speaking, the thicker the insulation, the greater its benefits. Spray foam has a higher U-Value than traditional insulation, so offers you more thermal benefits for your desired thickness. Internal stud wall insulation requires utilising small gaps, so it’s important to have a well performing insulant.

Product Type

With various types of insulation available, from open cell spray foam to closed cell spray foam, it’s important to consider their different values and moisture handling properties.

Open cell spray foam can stop sound travelling through your thin stud walls, but closed cell spray foam is a better performing insulant for your internal stud wall insulation.


The climate in your area can affect the type of stud wall insulation you should opt for. Harsher climates may need thicker insulation in order to keep the heat in more effectively.

Need advice? Contact us today and one of our friendly experts will be more than happy to help you.

Where to find the best stud wall insulation

Eco-Spray Foam Insulation Services

Whilst having your stud walls insulated is a worthwhile investment, in order to reap the full benefits, it’s essential that it’s installed by qualified professionals, too. That’s where we come in. We’ve been in the insulation industry for over two decades, and have been delivering premium quality products and expert services throughout that time – installing all stud wall insulation types.

Our mission is to provide the latest technological insulation solutions for modern-day applications, and we are certified users of the Icynene spray foam product – the newest in the range of insulating technologies on the market today.

Let our friendly team of insulation specialists here at Eco Spray Foam provide you with a bespoke solution to your insulation needs.

If you’re interested in finding out more about the best stud wall insulation in the UK, you can get in touch with us by calling 0203 411 5188. You can also take advantage of our free insulation survey for a residential or commercial property by filling out our online contact form here.

Frequently Asked Questions

  • How do you insulate a stud wall?

  • To install a soundproof barrier to an existing stud wall, you need to remove the existing plasterboard from one side of the wall. When this is done, the cavity between the stud wall will be left exposed so that you can infill between the studs with stud wall sound insulation DFM slabs. In addition to this, we have a pour fill solution that can be injected via 8mm drill holes, but it is a more expensive option.
  • What is the best stud wall insulation?

  • We believe that spray foam insulation is the best type for stud walls due to the airtightness you will achieve in addition to the speed of installation. It can be fitted at both time of build and retrofitted into existing stud walls.
  • How thick should wall insulation be?

  • Normally, your fixed insulation stud wall should be at least 60mm thick up to 100mm. The actual thickness requirement depends on the material used. You can consult our team of experts if you’re not sure about the best material to use for your stud walls.
  • What size of wood should I use for a stud wall?

  • Wood studs are common in the construction industry. Standard dimensions apply, which is the same measurement used in the manufacturing of steel studs – 1.5 inches thick and either 3.5 or 5.5 inches wide.
  • Can you insulate a wall from the inside?

  • You can insulate existing exterior walls either from inside or outside your house. The process of blowing insulation into walls is nearly identical, whether you want it done from inside or outside the house. The difference is that holes must be cut through the drywall with a tool like a large saw if you’re insulating your walls from the inside.
  • Do you need to insulate internal walls?

  • Internal stud wall insulation is useful, especially if you have unused rooms, guest rooms, or storage rooms in your home. Insulation will reduce the amount of heat transfer into those areas that don't require heating or cooling, effectively cutting down on your heating costs – and air conditioning costs if applicable.
  • How far apart are wall studs?

  • Studs function as support for your walls, making them a crucial framing element of your house’s structure. They're spaced either 16 or 24 inches on-centre (measured from centre to centre) along the wall and run between the floor and ceiling.
  • How thin can a stud wall be?

  • The thinnest workable wall of standard timber frame construction is 1.52 x 2.52 framing, fitted thinly with 12mm plasterboard. A stud wall acoustic insulation solution provides the type of noise reduction measure necessary, as these walls tend to conduct sound well otherwise.
  • Do you need an air gap for insulation?

  • The need of an air gap vary much depends on the type of insulation you wish to use. You can speak to one of our experts, and we’ll give you the right advice regarding the type of insulating thermal barrier that you wish to use.

Basic Tips For Insulation In Hot Climates

In hot, humid climates, making a house more comfortable by dehumidifying and cooling it is a priority. Then, there’s also the matter of direct radiation from the sun beating down on your roof and west walls. The sun’s rays directly heat up the surfaces of your house, and that heat conducts to the inside. Some of the techniques you can apply are:

Having light-coloured roofs to reflect most of the radiation away from your house.

Installing a radiant barrier to reflect the heat out and cavity barrier insulator as fire protection measure.

Having a vented air cavity directly under your roof that will act like a canopy.

Usage of properly-sized overhangs and porches.

Installation of insulation systems to the right locations.

About Thermal Insulation

Thermal insulation consists of a single, continuous insulating internal barrier layer underneath the building envelope (that is, the exterior walls, the lowest floor, and its roof and ceiling).

Because every space is unique in terms of its floor plan, materials and so on, there is no single ideal thermal solution that can be applied to an entire design.

If you’re not certain about the type of insulation you need, first consider the climate in your area and the specific area of the property where you need the insulation installing, then consult with an expert on the best type of product for your needs.

How does stud wall insulation work
Conserve Energy

How To Conserve Energy With Wall Insulation?

Spray wall insulation is one of several stud wall insulations solutions to consider when you’re looking for ways to keep your house warm and reduce your energy bills at the same time. Spray foam wall insulation acts as air and wind barrier, thereby boosting energy efficiency by reducing the number of heating or cooling devices that you need to use in your home.

If you would like stud wall insulation services at the most competitive rates for your home improvement project, get in touch with us today for a quote.