Spray foam removal, done properly and documented
Spray foam removal starts with an inspection, not a quote. We look at the loft, tell you whether it genuinely needs to come out, and if it does we remove it and hand you the paperwork a lender's surveyor asks for. Free inspection, fixed price, no deposit.
The short version
Spray foam applied to the underside of roof tiles hides the timbers, so a valuer cannot sign off what they cannot see. That is a lending problem before it is a building problem, and the two get deliberately confused by people selling removal. Removal costs £35 to £55 per square metre for open cell and £55 to £85 per square metre for closed cell, takes two to five days for most homes, and only helps if it is documented properly at the end.
Why this happens
It is a paperwork problem before it is a roof problem
Spray foam was sold hard between roughly 2015 and 2022, some of it under the Green Homes Grant. It works as insulation. The trouble is what it does to a survey.
Sprayed to the underside of the tiles or the sarking, it covers the rafters and bonds to the felt. A surveyor can no longer inspect the timbers, check for movement, or see whether the membrane beneath is intact. Faced with a roof they cannot assess, a valuer qualifies the valuation or the lender declines. In 2024 the BBC found that around a quarter of the UK's largest mortgage providers would not lend on a home with spray foam in the roof, and that every equity release lender it surveyed refused outright.
Separately, and less often than the cold callers claim, the foam can cause real damage. Closed cell foam in particular traps moisture against timber. The Property Care Association and the HomeOwners Alliance inspected more than 500 properties and found a defect in 35% of them. Which means around two thirds had no defect at all.
So there are two different situations, and they need different answers. Either your roof is fine and you have a documentation problem, or your roof has a problem and you have both. Nobody can tell you which from a phone call, and anyone who tries is guessing or selling.
This is the bit most removal companies leave out
If the foam was correctly installed and the timbers underneath are sound, a properly evidenced inspection report can be enough to satisfy a surveyor without any removal at all. The Property Care Association publishes an inspection protocol, developed with the RPSA in March 2023, written specifically so a surveyor can assess the individual roof rather than reject the property because foam is present. It is worth finding out whether that applies to you before you spend four thousand pounds.
What we actually do
The job, start to finish
Free inspection, about an hour
A surveyor gets into the loft properly, identifies the foam type, checks coverage, probes the timbers and looks at the membrane where it can be seen. Photographs throughout, including the awkward corners.
A written verdict, whichever way it goes
You get a report saying what is up there, what condition it is in and whether it needs to come out. If it can stay, the report says so and you can put it in front of a surveyor. Nothing to pay.
A fixed price with the extras itemised
If it does need removing, you get a written price before anything starts: removal, disposal, membrane work if needed, and re-insulation, listed separately so you can see what each part costs. No deposit.
Removal, two to five days
The loft is sheeted and protected. Foam is taken off mechanically, working with the grain of the timber rather than against it. Waste is bagged and removed under a transfer note, not left in your garden.
Honest reporting on what is underneath
Closed cell foam frequently destroys the felt on the way out. If the membrane has gone, the report says so and we price the repair. Covering that up is the failure the industry's new removal standard exists to stop.
Re-insulation to current Building Regulations
Once the foam is out the roof has no insulation at all. We put it back to current standards as part of the same job and the same price, so you do not get a second bill and a second visit.
The evidence pack
Completion certificate, photographs from before, during and after, a condition report on the timbers and membrane, the re-insulation specification and the waste transfer note. That is the bundle a lender's surveyor is actually looking for.
No obligation, no deposit
Have someone look at it properly
An hour in the loft and you will know exactly where you stand, in writing, with photographs. If the foam is sound, that is what the report says and there is nothing to pay.
Book the free inspection
Two steps. No deposit, and nothing to pay if the foam is sound.
Prices
What removal costs
Removal and disposal only. Everything else is a named extra, priced separately, so you can see exactly what you are being charged for. Figures are baseline rates for England and Wales.
Open cell foam
| Property | Treated roof area | Removal and disposal |
|---|---|---|
| Terraced house Usually the quickest job on the list. Access is the variable, not the area. | 35 to 55m² | £1,800 to £3,050 |
| Semi-detached house The most common job we quote. A standard three-bed semi sits in the middle of this band. | 55 to 80m² | £1,950 to £4,400 |
| Bungalow A large roof over a small footprint. Often an equity release case, and usually straightforward to work in. | 60 to 95m² | £2,100 to £5,250 |
| Detached house Bigger area and more complex roof shapes: hips, dormers and valleys all add time. | 80 to 120m² | £2,800 to £6,600 |
| Large detached or barn conversion Priced on survey. Scaffolding and a longer programme are usual at this size. | 120 to 200m² | £4,200 to £11,000 |
Closed cell foam runs roughly 60% higher per square metre because it bonds harder and comes off slower. The full table, the regional adjustment and every extra are on the cost page, along with a calculator.
By foam type
The two jobs are not the same
Open cell removal
Softer and lighter, and it comes away more readily. The cheaper of the two, and less likely to take the membrane with it.
Read thisClosed cell removal
Dense, rigid and bonded hard to the timber and the felt. Slower, more expensive, and the job where membrane replacement is most often needed.
Read thisRemoval and re-insulation
The loft has to be insulated again once the foam is out. Get it quoted together or you end up with two bills and two visits.
Read thisOur rules, published
What we will never do
Trading Standards has prosecuted spray foam operations in this market, including a 2024 case with 25 victims whose average age was 77. Pretending that is not happening helps nobody. These are our rules and every one of them is checkable.
- We never cold call. If someone rang you unprompted about your loft, it was not us.Trading Standards has prosecuted cold-call spray foam operations, including a 2024 case with 25 victims whose average age was 77.
- We never take a deposit. You pay when the work is done and inspected.Advice Direct Scotland has warned about deposit-taking removal firms; one reported case took £550 against a £5,500 quote.
- We will tell you if the foam can stay.The Insulation Manufacturers Association stated in February 2026 that correctly installed foam is safe and rarely needs removing.
- We never claim your home is on a national database or worthless.The Property Care Association named that claim as fabricated in August 2026. No such database exists.
- The price is written down before anything starts.It changes only if you ask for extra work, in writing.
- If the membrane is damaged, the report says so.Foam frequently bonds to and destroys the old felt. Covering that up is the failure the PCA's new removal standard is written to stop.
Spray foam removal, your questions answered
Can spray foam insulation be removed without damaging the roof?
In most cases yes, and that is the whole skill of the job. Foam is taken off mechanically, working with the timber rather than gouging across it. What cannot always be saved is the membrane underneath. Closed cell foam bonds to the felt and frequently destroys it on removal, which is why a competent quote prices membrane replacement as a separate line rather than pretending it will not be needed.
How long does spray foam removal take?
One to two days for a terrace or small semi with open cell foam. Two to three days for a standard three-bed semi. Three to five days for a detached house or any closed cell job. Add time if the membrane has to be replaced or timber repaired.
Do you need scaffolding?
Usually not. Most removal is done from inside the loft. Scaffolding is only needed where the foam has to be taken off with the tiles up, which happens on some closed cell jobs and where the membrane has to be fully replaced.
Can I remove spray foam myself?
You can, and people do, but understand what you are taking on. It is unpleasant, dusty work in a confined space, the dust from cured polyurethane is an irritant, and a botched job that gouges the rafters creates exactly the problem you were trying to fix. More to the point, DIY removal produces no documentation, and documentation is the reason most people are doing this at all.
Will removal definitely fix my mortgage problem?
Nobody can honestly promise that, and you should be wary of anyone who does. The lending decision belongs to the lender. What removal plus proper documentation does is take away the reason the valuer could not sign the roof off. Where lenders have declined purely because the timbers could not be inspected, that removes the objection. Where there is a separate problem with the roof, it will not.
What happens to the waste?
It is bagged in the loft, carried out and taken away under a waste transfer note, which goes in your evidence pack. Removed foam is bulky and light, so disposal is charged by volume rather than weight, typically £150 to £500 for a house.
Read next
Do I actually need it removed?
Around two thirds of inspected lofts had no defect at all. Here is how to work out which kind yours is.
Read thisWhere the lenders stand
A dated table of every major lender and equity release provider, and what nobody can honestly promise.
Read thisThe evidence pack
What a surveyor actually asks for after removal, and why a self-issued certificate on its own is not it.
Read this