Stud Wall Insulation

About Spray Foam For Stud Walls

Spray Foam is fast, effective, airtight, and breathable solution without the hassle of cutting PIR or pre-manufactured insulation into place.

Get improved thermal performance for stud walls when using our Sucraseal or Nexseal LE insulation materials. Breathable, airtight, fast, effective, and thermal helps to make spray foam the very best way to insulate brand new stud walls.


Spray Foam is fast and effective to install, saving time and money


Spray Foam offers one of the best thermal insulation values per inch


Spray Foam uses recycled plastics with no harmful VOC’s or HFC’s

Where To Use Spray Foam For Stud Walls

Traditional methods of installing stud wall insulation doesn’t always guarantee airtightness which is a modern requirement as per Building Regulations. In addition to this, the offcuts and wastage related to pre-manufactured materials, not least the time it takes to fit, helps to make spray foam insulation the superior option. Both Sucraseal or Nexseal LE are BBA certified for use in stud walls and once installed, the insulation will last for the life of the property without degradation, unlike mineral wool alternatives. Our technical design team will help to specify your project and ensure that you meet the required U-Value targets, backed up with detailed Hygrothermal Analysis to show that the system complies with ventilation and condensation requirements.


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How We Help You


Get in touch today to get the ball rolling


Let us specify the requirements for your project​


We’ll provide you with a budget price range


Use one of our ThermoFoam-approved installers


Once installed, we provide a 25-Year Product Warranty


Check out our Gallery where you will find some photographs of installations we’ve completed in the past. Whilst spray foam is insulation and not decoration, our experienced installation teams will always endeavour to provide a neat and tidy finish to the insulation. Nexseal LE closed cell is easier to achieve a neater finish whereas Sucraseal Open Cell expands at a faster rate to leave an undulated finish.


The Importance Of Stud Wall Insulation

Choosing the right insulation for the walls of a property is vital in protecting the envelope of the building from leaking heat. Excessive heat loss could combine with a colder inward airflow top create damp, mould and condensation within the wall structure. If such problems manifest once the internal decoration is complete, rectification can become very costly and disruptive.

Open Cell Vs Closed Cell

The low density of open cell insulation is perfect for reducing sound transmission. We’d only recommend its use in stud walls that have an internal timber-based board such as OSB or in cases where moisture cannot track through the walls from outside in. Whilst airtight, open cell has roughly the same thermal conductivity as a fibre-based insulation system, therefore, it may require plenty of space to comply with U-Value targets. Approximately 150mm of open cell insulation will achieve a 0.28 w/m2k U-value whilst 225mm will achieve in the region of 0.18 w/m2k.

How Long Does Spray Foam Last?

Either of our Sucraseal Open Cell or Nexseal Closed Cell foams will last with the life of your building, guaranteed by us for 25 years. On residential projects, we can also offer a 10 year insurance backed guarantee for additional peace of mind. The foam will not shrink, slip or degrade over time unlike most traditional types of insulation materials.

How is Spray Foam Installed?

Spray foam insulation is created in situ which mean the install technicians create the chemical reaction that makes the foam. Although an install of spray foam is a reasonably industrial process, it’s completely handled by our technicians from start to finish and we always leave your home clean and tidy! The spray foam equipment is contained within a long wheel base van, comprising of a compressor, generator, reactor, heated hose and the chemical drums. The only element of the spray foam equipment that enters your home is the heated hose and we ensure that sheeting is laid to your flooring to protect your home from any dirt or mess.

Can I Insulate Stone Walls?

Yes! We come across many scenarios when older buildings are being renovated and they have thick stone walls. We always recommend that a new stud wall frame is built around an inch from the wall so that we can insulate directly to the wall and behind the stud frame before joining in between the wall. This creates a seamless, monolithic layer of thermal insulation and really helps to bond the wall and the frame whilst eliminating the potential for moisture to pass through into the inner skin. The foam will also provide structural integrity to the entire wall.

Can I Dot & Dab Plasterboard?

Where closed cell spray foam insulation is installed directly to a masonry wall without any studs, it is possible to dot and dab the plasterboard directly to the foam if it has been applied neatly. We don’t advise this process though as it can be difficult to fit the plasterboard afterwards due to the undulations in the foam. Only the most experienced closed cell spray foam applicators can achieve a flat finish on the insulation and the thicker the insulation, the harder it is to guarantee a smooth, bump free finish.

Our Products

Check out our BBA Certified Spray Foams

Our range of open and closed cell spray foams are industry-leading, BBA-Certified, use recycled materials and contain water-based blowing agents.

Nexseal Closed Cell

This low exothermic, high-lift closed cell foam boasts a fast installation time, offers incredible thermal performance and improves the structural integrity of a building. Loved by installers for its fast rise, Nexseal is ozone-friendly and is pending BBA certification which is due in June 2022.

Sucraseal Open Cell

The leading open cell foam now available in the UK. Sucraseal combines peace of mind British Class 1 fire safety with exceptional thermal performance and is pending BBA Certification which is due in June 2022. Sucraseal is installed exclusively by ThermoFoam-approved contractors only.

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