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Spray foam insulation mortgage problems are leaving UK homeowners struggling to sell, remortgage or release equity from their properties. What was once promoted as an energy-saving improvement has become a costly obstacle for some homeowners. However, professional re-roofing could offer a solution, and properties sold at reduced prices because of spray foam concerns may present opportunities for informed buyers.
Spray foam insulation can conceal roof defects, interfere with ventilation and make mortgage lenders reluctant to lend. This can affect a property’s saleability and value. Where roof replacement is appropriate, reroofing may resolve underlying problems and restore buyer confidence. At Juniper Roofing Southern, we provide full reroofing services and can work alongside independent surveyors to help homeowners establish the right solution.
Spray polyurethane foam insulation was promoted as a way to reduce heat loss and improve energy efficiency. When applied beneath roof coverings, it expands and hardens, forming an insulating layer around the roofing materials.
However, some installations have left homeowners facing problems they never anticipated.
According to a House of Commons Library briefing published in January 2026, a November 2024 BBC investigation found that a quarter of the UK’s biggest mortgage providers surveyed would not lend against properties with spray foam insulation. All equity release lenders included in the investigation also said they would not lend.
Although this does not represent every lender, it highlights why homeowners can find themselves unable to sell or remortgage properties that might otherwise be perfectly marketable.
The concern is not necessarily the insulation itself, but whether it conceals defects or affects the roof’s performance.
Three particular issues can arise:
The Royal Institution of Chartered Surveyors (RICS) advises that spray foam insulation can affect property valuations and that independent specialist assessment may be necessary.
Importantly, not every spray foam installation is defective. Its suitability depends on the roof construction, installation method and condition of the materials beneath it.
Research published by Citizens Advice in June 2025 found that one in three surveyed homeowners with spray foam insulation in their loft reported problems, including damp, damaged timbers and difficulties selling or remortgaging.
The Property Care Association also reported findings from more than 500 spray foam assessment surveys in May 2025.
Of those surveyed, 35% had one or more spray foam-related defects, while 27% received recommendations to replace loft insulation or reroof.
These figures reflect the assessed properties, not every home with spray foam, but they show the importance of assessing the roof’s condition before remedial work.
Where spray foam is extensively bonded to roofing materials, or the existing roof has deteriorated, a complete reroof may offer a more effective long-term solution than attempting to remove the insulation alone.
Depending on the property’s condition, the work can include:
A professionally completed reroof can address structural concerns, improve weather protection, and allow inspection of previously concealed areas. At Juniper Roofing Southern, we tailor our reroofing services to each property’s condition, with clear explanations of the work required.
A property that buyers struggle to mortgage may attract fewer offers, especially when the roof needs investigation or extensive repairs. Some buyers may withdraw entirely, while others negotiate a lower price to reflect the uncertainty and expected costs.
Consequently, properties affected by problematic spray foam insulation can sometimes sell for less than comparable homes without these concerns. Replacing a defective roof may help restore buyer confidence, improve the property’s overall condition and potentially support a higher valuation.
No reliable national figure shows how much spray foam insulation reduces property values, and reroofing doesn’t guarantee an increase. Nevertheless, if roofing problems are preventing a sale, resolving them professionally could significantly improve the property’s marketability.
Properties affected by spray foam insulation can present an opportunity for prospective buyers. Where mortgage difficulties have delayed a sale, sellers may reduce their asking price, potentially allowing buyers to purchase below the value of comparable properties.
The important consideration is whether the discount covers the necessary roofing work.
Imagine a property worth approximately £350,000 in satisfactory condition, offered for £290,000 because of spray foam concerns.
An independent survey identifies the need for a complete reroof costing £25,000. Allowing £5,000 for unforeseen roofing work brings the total purchase and reroofing cost to £320,000.
That represents a potential £30,000 saving against the property’s assumed market value, before purchasing expenses and any other repairs. These figures are illustrative, and the completed property’s value is not guaranteed.
Beyond resolving existing problems, reroofing can also improve a property’s market appeal. An article published by Estate Agent Today in May 2025 suggests homeowners could recover 60% to 70% of roof replacement costs through increased resale value. This is an indicative estimate, rather than a verified UK average or guaranteed return.
A new roof may also attract buyers looking for a property without immediate repair costs, potentially supporting a quicker sale and stronger offers.
Before purchasing, selling or commissioning reroofing work, an independent assessment can establish whether the insulation has affected the roof and what remedial work is appropriate.
Not every property requires complete roof replacement. Some installations may be acceptable, while others require specialist removal or structural repairs.
At Juniper Roofing Southern, we work alongside independent surveyors to determine the right re-roofing requirements, giving homeowners and buyers a clearer understanding of the work before they proceed.
When my partner and I viewed a house in Hailsham, we loved its potential. It was spacious, with a fantastic garden, although it needed modernising. We made an offer, which was accepted, and arranged an independent property survey.
The survey revealed spray foam insulation in the roof, which could have prevented us from getting a mortgage. We hadn’t inspected the loft during our viewing and wouldn’t have recognised the potential problem even if we had.
We contacted Juniper Roofing Southern to assess the roof and provide a quotation for re-roofing. We hoped to proceed at our agreed purchase price if the vendors would replace the roof before completion.
Juniper carried out their own inspection and identified damp in the roof timbers, confirming that a complete re-roof was necessary. They provided professional advice, kept us updated and supported us during negotiations with the vendors.
Unfortunately, we couldn’t reach an agreement with the seller, and the sale fell through.
Although disappointing, Juniper’s expertise helped us avoid what could have been an extremely costly mistake. Their honesty, communication and willingness to help, even though the work never went ahead, were exceptional.
We absolutely recommend Juniper Roofing Southern and will certainly use them on the house we did manage to buy! Louise Sims – Hailsham
With more than 25 years of combined roofing experience, our team provides complete reroofing services throughout East Sussex, West Sussex and surrounding areas.
We understand that discovering spray foam insulation problems can be particularly concerning when buying or selling a property.
Our approach is straightforward. We assess the proposed roofing work, explain what is required and provide a detailed quotation. Where specialist investigation is needed, we can work alongside independent surveyors.
Whether you are considering replacing your roof before selling or assessing a property you hope to purchase, we can help you understand the roofing work involved.
Yes, although lender policies vary. Some require independent assessment or remedial work, while others may decline properties containing spray foam insulation.
No. Properly specified installations aren’t automatically defective. An independent assessment should establish whether removal is necessary.
Reroofing may address the issues preventing mortgage approval, but the lender makes the final decision. Confirm their requirements before undertaking work.
This depends on the existing roof’s condition. If roofing materials are damaged, heavily contaminated, or nearing the end of their lifespan, a full replacement may be more appropriate.
Potentially. Replacing a defective roof may improve buyer confidence, saleability and valuation, although any financial uplift depends on the property and local market.
Not every property with spray foam insulation needs a new roof. However, where timber decay, structural deterioration or damaged roof coverings are identified, reroofing may be the most practical long-term solution.
Dense closed-cell foam can also bond so firmly to existing roofing materials that removing it without causing further damage becomes difficult. In these circumstances, replacing the affected roof may be more economical than paying for removal followed by extensive repairs.
At Juniper Roofing Southern, we provide professional full reroofing services and can work alongside independent surveyors to establish the appropriate solution.
Whether you are struggling to sell your home or considering buying a property affected by spray foam insulation, we can assess your reroofing needs and provide a detailed quote.
Call us on 01323 810 555 or contact us online to discuss your roofing requirements.
Registered address: 31 Willingdon Road, Eastbourne, East Sussex BN21 1TN. Company Registration Number: 15706433.
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