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The Benefits of Spray Foam Insulation Installation in the UK & Ireland

Spray foam insulation has become increasingly popular in the UK and Ireland for its outstanding energy efficiency and versatile applications. Whether you're considering it for your home, campervan, or even a commercial building, spray foam insulation offers numerous benefits that traditional insulation materials can't match. In this blog, we'll explore the advantages of spray foam insulation, the different types available, and considerations for installation, including costs and regulations.

What is Spray Foam Insulation?

Spray foam insulation is a modern insulation solution that involves spraying a liquid foam mixture onto surfaces, where it expands and hardens into a solid cellular structure. This method provides superior insulation compared to traditional materials like fiberglass or cellulose. Spray foam insulation can be classified into two main types: closed cell and open cell.

Closed Cell vs. Open Cell

  • Closed Cell: This type of spray foam insulation has a denser structure, providing better thermal resistance (higher R-value) and moisture barrier properties. It's ideal for use in areas where structural integrity and water resistance are crucial, such as roofs and external walls.

  • Open Cell: Lighter and more flexible, open cell spray foam insulation is perfect for interior applications like walls, floors, and ceilings. It offers excellent soundproofing and is generally more cost-effective than closed cell foam.

Benefits of Spray Foam Insulation

  1. Energy Efficiency: Spray foam insulation creates an airtight seal that significantly reduces heat loss. This leads to lower energy bills and a more comfortable living environment.

  2. Moisture Barrier: Especially with closed cell spray foam, it acts as a barrier against moisture, reducing the risk of mould and mildew.

  3. Durability: Once installed, spray foam insulation can last for decades without degrading, making it a long-term investment.

  4. Versatility: It can be used in various applications, from under floors and in lofts to roofs and even metal buildings.

  5. Improved Air Quality: By sealing gaps and cracks, spray foam insulation helps keep pollutants and allergens out, improving indoor air quality.

Installation Considerations

Cost in the UK and Ireland

The cost of spray foam insulation can vary based on factors such as the type of foam, the area to be covered, and labour costs. Generally, spray foam insulation cost in the UK ranges from £20 to £50 per square meter. For precise figures, it's advisable to get quotes from local spray foam insulation installers.

Installation Process

  • Preparation: The area needs to be clean and dry. Any existing insulation should be removed, especially if it's damaged or wet.

  • Application: Using a spray foam insulation gun, professionals apply the foam mixture to the desired surfaces. The foam expands and cures quickly.

  • Post-Installation: After curing, any excess foam is trimmed, and the area is inspected to ensure complete coverage.

Types of Applications

  • Roof and Loft: Ideal for sealing roofs and loft spaces, spray foam insulation helps prevent heat loss through the roof, a common area for energy inefficiency.

  • Under Floor: Applying spray foam insulation under floors can eliminate drafts and improve the overall warmth of your home.

  • Campervans: For those looking to insulate their campervans, spray foam offers a lightweight and effective solution to maintain a comfortable temperature.

  • Metal Buildings: It can be used to insulate metal buildings, providing both thermal insulation and condensation control.

Training and DIY Options

For those interested in DIY, spray foam insulation kits for sale can be found, but proper training is essential to ensure safety and effectiveness. Courses are available for those looking to become professional installers, and these can provide valuable skills and certification.

Regulatory and Safety Considerations

Before installing spray foam insulation, it's crucial to understand local building regulations and potential dangers. Incorrect installation can lead to problems such as trapped moisture or even structural damage. Additionally, issues related to mortgage acceptance and insurance should be clarified, as some lenders may have specific requirements regarding spray foam insulation.


Spray foam insulation is a highly efficient, durable, and versatile solution for enhancing the energy efficiency of buildings in the UK and Ireland. Whether you're insulating a new build, retrofitting an older home, or looking to improve a campervan, spray foam offers numerous benefits. Ensure you choose reputable spray foam insulation companies near you and understand the costs, benefits, and regulations involved to make the most informed decision for your insulation needs.

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