If you’re planning to remove spray foam insulation from your home, it helps knowing what to expect and the tools professionals might use to do the job safely and efficiently.
This article answers all your spray foam removal-related questions, including what tools are used to remove spray foam insulation, reasons why you might need to remove it, and the differences between open-cell and closed-cell spray foam removal. We focus on spray foam removal from a professional point of view here, so detail the removal tools professionals might use if you book a spray foam removal service through us. Spray foam removal costs are much lower than people realise today, so it’s worth considering if you need your spray foam removed.
Regardless of if you decide removal is necessary for you or not, it’s good to understand the process. So let’s take a closer look at the spray foam removal tools below.
Spray Foam Removal Tools
Professional spray foam removal companies like National Spray Foam Removal partners will use specialised tools and equipment to safely and efficiently remove spray foam insulation from your home. These include:
Reciprocating Saw
Reciprocating saws are power tools with long, serrated blades that move rapidly back and forth. The saw’s power and speed can easily cut through dense, hardened foam, making it the preferred choice for major removals. Other than foam, it can easily cut through concrete, brick, and tile, as well as sheet metal, rebar, plywood, and lumber.
Foam Saw
Foam saws are spray foam removal machines designed to cut through thick layers of foam insulation. Many feature dual blades that move in opposing directions, allowing for smooth, clean cuts without excessive tearing or dust generation. Foam saws are often used for minor removal and jobs where precision is required.
CI Cutter
CI Cutter is a specialised spray foam insulation removal tool designed to trim and remove closed-cell foam insulation precisely and efficiently. It features a rotating head equipped with regular hooked teeth that shave foam cleanly without damaging the underlying structure. The design allows the cutter to run directly on wooden studs, which helps move the tool up the wall with minimal effort.
Putty Knife and Paint Scraper
Putty knives and paint scrapers help professionals gently pry and scrape foam from surfaces without scratching, gouging, or damaging the material beneath the insulation.
Putty knives and scrapers are often used in small or narrow areas where power tools would be too coarse or risky. They’re used after larger chunks of foam have been cut away with saws or knives, to smooth off residue and prepare surfaces for refinishing or re-insulation.
Wire Wheel Grinder
A wire wheel grinder removes stubborn foam residue, particularly on hard surfaces like wood, metal, or concrete. The rotating wire bristles scrape away remaining foam fragments that can’t be removed with scrapers alone.
Wire Brush or Drill Brush Attachment
A wire brush or drill brush attachment helps remove stubborn foam residue left behind after the bulk of the material has been scraped away. The brushes can be manually applied or attached to a drill for faster and more efficient cleaning.
Solvent-Based Foam Remover
Solvent-based foam removers are chemical solutions designed to dissolve and break down cured polyurethane foam. They’re one of the best tools for open-cell insulation removal because it’s softer and less dense than closed-cell insulation.
Solvent-based foam removers penetrate the foam, softening it from within and making it easier to cut and scrape off.
Most solvent-based foam removers are made of halogenated hydrocarbons and a monohydric alcohol, which can be quite hazardous if not handled properly. Due to their potency, professionals always use goggles and protective gloves when using removers.
For less stubborn residues, professionals may use acetone, WD-40, or a lacquer thinner to soften the foam.
Heat Gun
Heat guns soften hardened foam, making it easier to scrape or peel off surfaces. The heat gun warms the foam in small sections, reducing its rigidity. It’s often used in combination with knives and scrapers to quickly and thoroughly remove foam residue.
Dry Ice
Some companies use a removal method called dry ice spray foam removal, also known as dry ice blasting spray foam removal or polar blast spray foam removal, to remove hardened spray foam. This method involves propelling small dry ice pellets at high speeds into the foam, causing it to shrink, crack, and separate from surfaces without the use of harsh chemicals.
High-powered Vacuum
Removing spray foam insulation can be messy, so professionals always bring a high-powered industrial vacuum to collect foam debris, dust, and small particles during and after the work.
Vacuuming prevents the spread of hazardous dust and chemical residues, plus it makes sure the underlying surfaces are ready for refinishing or installation of new insulation.
Vacuums designed for this purpose are often equipped with HEPA filters to capture fine particles and protect both the workers and the people living inside the building.
Plastic Sheeting
Other than high-powered vacuum, professionals place heavy-duty polyethene (PE) sheeting on floors and nearby surfaces to catch falling foam and make cleanup easier.
Why Might You Need to Remove Spray Foam Insulation?
Spray foam insulation can last decades, with an expected lifespan of 20 to 50 years for open-cell foam and 80 to 100 years for closed-cell foam.
But as with most insulation, its longevity depends on the type of foam used, the quality of installation, and environmental conditions such as exposure to moisture and UV light.
Spray foam insulation that has been improperly installed, applied in unsuitable conditions, or is made from low-quality materials will deteriorate prematurely, forcing homeowners to remove the foam sooner than expected to prevent structural damage, energy loss, or health hazards.
Here are the top reasons why homeowners might need to remove spray foam insulation from their homes:
Ageing or Deteriorating Foam
Spray foam insulation deteriorates over time, especially if it’s constantly exposed to UV rays or moisture, or is made from low-quality materials. You’ll know your spray foam insulation is deteriorating when:
- Cracks or gaps appear on the foam
- The foam no longer clings tightly to the surface it was applied to
- Damp patches, condensation, or mould form on or around the insulation
- The foam appears discoloured, with yellowing or dark spots from UV exposure or chemical breakdown
- Your energy bills are higher than normal, indicating that the insulation isn’t performing as it should anymore
- Some rooms feel too cold or too warm compared with the rest of the house.
- The foam appears brittle or powdery, losing its original integrity.
- You or a family member suddenly experiences skin, eye, or respiratory irritation with no obvious cause, which could mean the spray foam is off-gassing
- Foul or chemical odours linger in the home
- Surrounding structures show visible damage, such as warping wood or peeling paint near the foam
If you notice any of these signs, it’s time to remove your spray foam insulation. Leaving the insulation as-is can lead to worsening structural damage, higher energy bills, and health issues that may end up costing far more than the removal itself.
Mould or Moisture Issues
Improper installation can trap moisture behind or within the foam, creating the perfect environment for mould growth.
Mould can be dangerous if left to fester, leading to respiratory illnesses, allergies, infections, or asthma. Inhaling or touching the spores can trigger an allergic reaction, like a runny nose, sneezing, skin rash, and red eyes, as well as coughing, wheezing, and breathlessness.
According to the End Fuel Poverty Coalition, nearly 5,000 people die in the UK annually due to mould. Early signs of mould behind spray foam include musty odour, visible dark or greenish patches on nearby surfaces, and persistent dampness.
Animal Infestations
Pests like rodents may chew through spray foam to access warmth, food, or nesting sites. These infestations can introduce droppings, urine, and bacteria, which can pose health risks and may lead to unpleasant odours.
Moisture trapped within or around spray foam can also attract ants, cockroaches, termites, and silverfish.
Over time, this can lead to structural damage and further compromise the integrity of the insulation.
Pesticides can only do so much—they may eliminate the pests around the insulation, but not the ones inside. And if the insects have nested within the spray foam, it’s only a matter of time before they hatch and multiply.
Poor Air Quality
Deteriorating or improperly installed spray foam insulation can release volatile organic compounds (VOCs), greatly affecting indoor air quality.
VOCs can result in various health issues, including eye, nose, and throat irritation, nausea, headaches, loss of coordination, and damage to the liver, kidneys, and central nervous system.
Removing old spray foam insulation can improve the home’s air quality and reduce your exposure to harmful chemicals.
Improve Resale Value
Removing old spray foam insulation can improve a home’s resale value.
Spray foam insulation is generally seen as undesirable and unattractive. It can’t easily be covered up or decorated, which can be a problem if the insulation wasn’t applied neatly or evenly.
The fact that spray foam insulation can gradually cause structural damage out of plain sight adds to buyers’ concerns.
Combined with the difficulty of removal, spray foam insulation can deter prospective buyers and complicate inspections and mortgage approvals.
Mortgage and Property Sale Issues
According to a report published by the BBC, more than 25% of major mortgage lenders refuse to approve loans for homes with spray foam insulation, especially if it has been applied to roof timbers.
These include TSB Bank, Principality, Skipton Building Society, Metro Bank, and Yorkshire Building Society. Even LiveMore, which had previously approved equity release to homes with spray foam insulation, revised its policies to refuse such applications.
Many lenders agree to approve mortgages only on the condition that the spray foam insulation is fully removed and replaced with an acceptable alternative.
Industry bodies like RICS have had their say on spray foam, and most are in agreement that spray foam can cause significant issues for homeowners if improperly installed or not installed in the right circumstances.
Renovation or Repairs
Another reason why homeowners might remove spray foam insulation from their home is because of renovations or repairs.
Spray foam insulation can block access to electrical wiring, plumbing, or structural elements, making it difficult to carry out upgrades, replace damaged materials, or reconfigure spaces without first removing the foam.
It’s even more difficult if the insulation is made of closed-cell foam, as it bonds tightly to surfaces that regular equipment can’t break or pierce through without specialised equipment.
Types of Spray Foam
Spray foam insulation comes in two main types: open-cell insulation and closed-cell insulation. Each type requires a different removal process due to the difference in density, rigidity, and adhesion.
Open-cell Foam Insulation
Open-cell foam insulation is soft, flexible, and relatively easy to remove. The foam expands to 100 times its size, so it’s less dense, allowing it to be cut, scraped, or vacuumed out with standard tools without causing significant damage to the underlying surfaces.
Closed-cell Foam Insulation
Closed-cell foam insulation is the opposite of open-cell foam insulation: it’s hard, rigid, and extremely dense. It solidifies right into the surface it’s applied to, making it difficult to remove. Removal often requires specialised cutting tools, heat, and solvent-based closed-cell foam removers.
Can You Remove Spray Foam Insulation Yourself?
Technically, yes, you can remove spray foam insulation yourself. However, it’s greatly discouraged.
Spray foam insulation is notoriously difficult to remove, requiring professional tools and hours of labour. It’s also dangerous; most DIY guides suggest using knives, saws, or other sharp tools, which can easily cause injury as well as damage to your property
Additionally, disturbing the foam can release harmful chemicals or dust, posing serious respiratory and skin hazards if protective equipment isn’t used.
National Spray Foam Removal partners have been in the spray foam insulation removal industry for years, and all have a reputation for safe, efficient, and professional service. Contact us today to receive a free, no-obligation quote from our removal partners and enjoy competitive pricing you’re unlikely to find anywhere else.
