Spray Foam Removal Cost

How Much Does It Cost to Remove Spray Foam Insulation?

The average cost of spray foam removal is £40 per square metre, though the exact figure depends on the type of foam used, the size of the area treated, and the method of removal required.

Also known as spray polyurethane foam (SPF), spray foam insulation is applied to roofs, lofts, wall cavities, and floors to improve energy efficiency by sealing gaps and reducing heat loss. Loft spray foam removal and roof foam removal are by far the most common jobs, though the same process applies to attic spaces and other areas of the home.

It’s often used for its impressive insulating properties and airtight seal, but, despite its benefits, spray foam insulation can sometimes cause problems. This includes mortgages being harder to obtain, moisture build-up and mould growth, and roof timber decay, which can obstruct necessary roofing repairs or replacements.

It’s easy to see why a growing number of homeowners are looking into how to remove spray foam insulation, especially those looking to sell, remortgage or address structural issues linked to its installation.

Even so, foam insulation removal is a labour-intensive job requiring specialist tools and sometimes chemical solvents, which means it isn’t cheap. For a three-bed detached property, spray foam insulation removal costs around £3,200.

Spray Foam Removal Prices

Spray foam insulation removal prices will vary, depending on the type of foam that needs removing, and how difficult it is to access. The table below gives you an idea of removal costs based on foam type:

You will also need to budget around £100 for specialist disposal, as spray foam insulation can involve hazardous dust or chemicals during removal and need to be removed using specialist methods.

Understanding the Two Types of Spray Foam

If you're unsure which type of spray foam insulation you have, the easiest way to tell is by touch. Open-cell foam feels soft and spongy, it compresses when pressed and is noticeably lighter. Closed-cell foam is rigid and dense, similar to a solid block of plastic.

This distinction matters because it directly affects removal costs. Open-cell foam is less dense and more breathable, making it quicker and easier to remove. Closed-cell foam bonds more strongly to surfaces and can trap moisture, sometimes causing damage to timber or brickwork beneath — which is why it costs more to remove and may require additional repair work afterwards.

Labour Cost to Remove Spray Foam Insulation & Timescales

Labour is one of the biggest factors in spray foam insulation removal costs. Rates vary by region - with removal costing more in areas like London and the South East - and depend on how complex the job is.

Jobs with restricted access, foam insulation bonded to roof timbers, damaged timbers, or thick foam layers take longer and cost more. On average, removing spray foam from a small loft takes one to two days to complete, while larger or more damaged areas can take up to five days or more.

Most jobs require at least two tradespeople to speed up spray foam removal and ensure safe removal and waste disposal. With tradespeople charging an average of £175 per day, labour makes up most of the cost of foam insulation removal.

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Factors That Impact Spray Foam Removal Costs

There are a number of factors that will affect spray foam insulation removal costs:

• Size of the Area — Larger lofts or roofs will cost more to treat, as they require more time, labour and materials.
• Foam Type and Thickness — Closed-cell foam and thicker layers are harder to remove, increasing labour time and cost.
• Access Issues — Access issues - such as steep roof slopes, limited loft access or structural obstructions - can make the entire process difficult and time-consuming, and therefore more expensive.
• Foam Condition — Older or degraded foam tends to crumble easily, whereas newer foam can take more effort to remove. This impacts the amount of time and work required.
• Timber Treatment or Repairs — If the roof timbers are damaged or damp, repair work might be required to protect the roof structure, which adds to the cost.
• Wiring or Pipework — If there’s electrical cables or plumbing under the foam, the job becomes more complex and requires more care, increasing the price.

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Additional Spray Foam Removal Costs

• Roof Timber Repairs — If spray foam has trapped moisture and has caused timber rot or decay, roof repairs or replacements may be needed.
• Loft Re-Insulation — Once you've had the spray foam removed, you’ll likely need to install new insulation to replace the old foam insulation, which can cost between £10 and £37 per square metre.
• Skip Hire — Some contractors include this in their quote, but if not, skip hire prices start at around £75.
• Scaffolding — For hard-to-access roofs or taller properties, scaffolding may be required. You should expect to pay an average of £22.50 per square metre for scaffolding hire.

Foam Insulation Removal from Different Surfaces

The cost and complexity of spray foam removal varies depending on where it has been applied. Roof and loft spaces are the most common, and generally the most straightforward, while wall cavities and underfloor areas tend to be more disruptive and expensive.

• Roof Structure and Timbers — This is the most common area for loft spray foam removal, and the work needs to be done carefully to protect the timber beneath. For a standard 3-bedroom property with roughly 80m² of roof space, total removal costs typically come to around £3,200. Jobs become more expensive when foam is thick, timbers are damaged, or access is restricted.
• Wall Cavities — Foam insulation removal from wall cavities can be challenging due to limited access. It often requires cutting into walls, which makes the process more disruptive, costly and timely.
• Underfloor Spaces — Spray foam insulation under floors can be difficult to remove due to tight spaces and the presence of pipes or wiring. It’s less complex than removing spray foam from wall cavities, but still more difficult than roof areas.

Alternative Types of Loft Insulation

Once the spray foam has been removed, you'll need to choose a replacement. Adding new loft insulation costs range from £10 to £30 per square metre. The options below are all widely accepted by mortgage lenders and come in at a fraction of the cost of spray foam removal.

Mineral Wool

Mineral wool is one of the most popular loft insulation types in the UK. It comes in rolls that sit between joists, making it straightforward to install. It's breathable, won't trap moisture, and is widely accepted by mortgage lenders. Expect to pay around £10 to £20 per square metre for supply and installation.

PIR Boards

PIR boards are rigid and offer excellent thermal performance — often better than mineral wool for the same thickness. They're typically fitted between roof rafters or under flooring. Installation is more time-consuming, as each board needs to be cut to size, so costs are higher: typically £20 to £30 per square metre. Most lenders accept PIR boards when installed correctly.

Blown Cellulose

Blown cellulose is made from recycled paper and blown into loft spaces using specialist equipment. It's a good option for awkward spaces and is considered eco-friendly. Because it requires professional installation, costs sit at around £15 to £25 per square metre. It's generally accepted by mortgage lenders, provided the loft is adequately ventilated.

Checklist: Hiring a Spray Foam Removal Specialist

Professional spray foam removal is a specialist job, and not something you can risk with DIY removal. It’s important to hire an expert who knows exactly what they’re doing.

With MyJobQuote, you can request multiple quotes from local professional spray foam removal specialists. It's fast, free, and there's no obligation to go ahead.

• Are they experienced? It’s important to check whether they’re familiar with both open-cell and closed-cell foam.
• What removal method will they use? Different types of foam and surfaces may require different techniques, and a reputable spray foam removal specialist should be able to explain the methods they use.
• Do they have the proper waste disposal licenses? It’s important that spray foam waste is handled and disposed of correctly. Make sure the spray foam removal expert you choose has a valid licence to ensure safe removal and disposal.
• Can they provide evidence of their work? It’s a good idea to ask for examples of previous jobs, including before and after photos, to see the quality of their work.
• Do you have an itemised quote? A professional spray foam removal quote should cover the full scope of the job, including the initial inspection, removal, waste disposal and cleaning up after. Check for hidden costs or unclear terms, as you don’t want any surprises.
• Do they have insurance? Make sure they have public liability insurance. This protects you if any damage occurs.
• Do they offer any guarantees? Check what their guarantee includes and if they fix any problems that arise after the job is done.
• Do they have positive reviews? Look at their MyJobQuote profile to see the feedback they have received from other homeowners.

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