Is spray foam insulation in your loft stopping you from selling your home or securing a mortgage? Next Generation Insulation provides professional, certified spray foam removal across Nottingham, Birmingham, Coventry, Stafford, Leicester, and the wider Midlands. We work with homeowners, estate agents, and surveyors to remove spray foam safely, inspect the roof structure, and issue a Spray Foam Removal Certificate that satisfies mortgage lenders and RICS-aligned surveyors.
Spray foam insulation was heavily promoted between 2010 and 2022, often through government-backed energy efficiency schemes. Thousands of properties across the Midlands had open-cell or closed-cell foam applied to the underside of roof timbers and rafters. At the time, it was presented as a fast, effective way to reduce heat loss.
The problem is now well established. Once spray foam is in place, a surveyor cannot inspect the condition of the roof timbers, felt, battens, or tile fixings beneath it. Without that inspection, most UK mortgage lenders will not lend. The Royal Institution of Chartered Surveyors (RICS) classifies spray foam in the roof space as a material defect, and the majority of high street lenders follow this guidance.
Beyond the mortgage issue, spray foam causes physical damage to the roof over time. It blocks the natural airflow that keeps roof timbers dry. Moisture becomes trapped against the timber, leading to wet rot and dry rot. Felt deteriorates. Battens weaken. Closed-cell foam bonds rigidly to tiles and can crack them or pull fixings loose as the structure moves with temperature changes.
For many homeowners, professional removal is the only route back to a mortgageable, saleable property.
Next Generation Insulation follows a structured, stage-by-stage process on every project.
We visit your property and inspect the loft space. We identify the foam type, assess thickness and coverage, check the condition of visible timbers, and look for signs of damp, rot, or structural compromise. You receive a detailed written quote with no obligation.
Before any removal begins, we set up dust containment in the loft space to prevent foam particles from entering the living areas below. Stored items are protected and safe access is established throughout the work area.
We use oscillating cutters, hand scrapers, and controlled mechanical techniques to separate cured foam from rafters, purlins, ridge boards, and battens. Each section is cleared methodically from eaves to ridge, working carefully around electrical cables and pipework.
With the foam removed, every rafter, purlin, and batten is inspected for wet rot, dry rot, woodworm, or structural weakness. Affected timber is treated or replaced. This stage is critical because the foam may have been concealing damage for years.
We check the condition of the roofing felt or breathable membrane. Where felt has been degraded by the foam or has simply reached the end of its serviceable life, we advise on repair or full replacement. In some cases, a complete roof replacement is the right outcome, and we can carry this out as part of the same project.
All foam waste is bagged, removed from your property, and disposed of through licensed waste carriers in compliance with Environment Agency regulations. We leave the loft space clean and clear.
You receive a Spray Foam Removal Certificate confirming that the foam has been fully removed, the timbers have been inspected and treated where necessary, and the roof is in a condition suitable for mortgage lending and survey purposes. This is the document your lender or surveyor needs.
There are two types of spray foam insulation found in UK properties, and both present problems for mortgage lenders.
Open-cell spray foam is the softer, lighter type. It expands significantly on application and fills roof cavities and gaps. It absorbs moisture readily, so the timbers beneath it are frequently damp or showing early rot by the time removal takes place. Open-cell foam is generally easier to remove than closed-cell because it is less dense and bonds less aggressively to timber.
Closed-cell spray foam is rigid and dense. It forms a hard layer that bonds tightly to rafters, battens, tiles, and felt. Because it creates an almost airtight seal, it prevents ventilation in the roof space entirely, causing condensation to form between the foam and the timber. Closed-cell foam requires more controlled removal to avoid damaging the substrate beneath.
Both types must be fully removed for a property to pass a mortgage survey. We remove both from all roof structure types.
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Understanding the damage spray foam causes helps explain why removal is so important.
Moisture becomes trapped. Warm, damp air from the living spaces rises into the loft and normally escapes through eaves, ridge, or breathable felt. Spray foam seals these ventilation routes. Condensation forms on the cold tile surface and drips back onto the timber, where it cannot evaporate.
Timber rots. Timber that stays damp develops wet rot. In warm, poorly ventilated conditions, dry rot can follow. Dry rot spreads through timber and is costly to treat. We regularly find decay in rafters, purlins, and battens when foam is removed, even on properties where installation was only a few years ago.
Felt degrades. Traditional bitumen felt was not designed for prolonged contact with polyurethane foam. The chemicals in the foam break down the felt over time, making it brittle and prone to tearing. Once the felt fails, rainwater has a direct path to the roof structure.
Tiles become fixed. Spray foam bonds tiles to battens, removing the small degree of natural movement a roof needs to cope with wind loading and temperature variation. This can crack tiles and, in serious cases, lift entire sections of the roof covering.
The mortgage issue is the most common reason homeowners contact us. Here is how the sequence typically unfolds.
A homeowner applies to sell their property or remortgage. The lender instructs a surveyor. The surveyor enters the loft, identifies spray foam insulation, and notes in their report that the roof timbers cannot be inspected. The lender receives the report and declines the mortgage application because the structural condition of the roof cannot be verified.
This applies to both open-cell and closed-cell foam. It does not matter how recently the foam was installed or whether there are no visible problems. If the surveyor cannot see the timber, most lenders will not proceed.
Once the foam is removed and Next Generation Insulation issues a Spray Foam Removal Certificate, the property can be surveyed normally. The surveyor can inspect the timbers, felt, and fixings. The lender can then consider the mortgage application on its merits.
Once spray foam has been removed and the roof structure has been inspected and treated, the loft space needs to be re-insulated. An uninsulated loft can account for up to 25 per cent of a home’s heat loss, so leaving it bare is not a practical option.
We install replacement insulation as part of the same project. The products we use are breathable, allowing moisture to move naturally through the roof structure rather than becoming trapped.
We typically recommend sheep wool insulation for older properties. It is breathable, non-irritant, fire resistant, and has a lifespan of more than 60 years. For newer builds or where loft space is limited, SuperFOIL insulation delivers strong thermal performance with significantly less thickness than traditional materials.
Every replacement installation includes a vapour control layer on the warm side of the insulation to prevent condensation forming within the roof structure.
We carry out spray foam removal across the Midlands, including:
Not sure if we cover your area? Call us and we will confirm.
Spray foam covers the roof timbers and prevents a surveyor from inspecting their condition. Without that inspection, lenders cannot confirm the roof is structurally sound. RICS guidance classifies spray foam as a material defect, and most UK lenders follow this position.
It is possible to find a cash buyer, but most buyer chains involve mortgage finance. If the buyer’s lender instructs a surveyor who flags spray foam, the sale will stall or fall through. Professional removal is the most reliable way to restore saleability.
Cost depends on the type of foam, the area of coverage, the condition of the timbers, and whether replacement insulation or roof repairs are needed. We provide a detailed written quote after a free home survey, so you know exactly what is involved before any work begins.
A typical three-bedroom semi-detached property takes two to three days. Larger properties, bungalows with extensive roof areas, or lofts with complex structures may take longer. We confirm timescales in your written quote.
It is a formal document confirming that spray foam has been professionally and fully removed, that the roof timbers have been inspected and treated where necessary, and that the property is suitable for mortgage survey purposes. Most lenders and surveyors will request this document before proceeding.
In some cases, foam has caused sufficient damage that a full roof replacement is the appropriate outcome. We carry out roof replacement as part of the same project and can advise you on this after the initial survey.
If spray foam insulation is affecting your ability to sell, re-mortgage, or simply protect your home, contact Next Generation Insulation today. We offer a free home survey across the Midlands with no obligation and no pressure.
📞 01332 480429 Or complete the contact form and we will be in touch within 24 hours.
Unit C (1st Floor Offices) 122, Leicester LE5 3QN
