Cavity wall spray foam removal in Bath, done properly and signed off
Specialist cavity wall foam extraction Bath Somerset, with lender-ready paperwork
Cavity wall spray foam removal in Bath is the specialist job of cutting out failed injected foam from your wall cavities, clearing the debris and restoring the cavity so it can breathe and be reinsulated correctly. We work on solid Victorian walls in Widcombe, 1930s semis in Oldfield Park and modern builds across Kingsmead. If a surveyor, lender or buyer has flagged the foam in your walls, we can help.
What cavity wall spray foam removal in Bath actually involves
Cavity wall spray foam removal in Bath is the controlled extraction of injected polyurethane foam from the gap between your inner and outer leaf, followed by cleaning, inspection and reinstatement of the cavity. Foam that was pumped in through drilled bricks can shrink, crack and trap water against the ties and timber. We cut it back with reciprocating saws and oscillating multi-tools, pull it out in sections, then vacuum the residue with an industrial vacuum and HEPA filter vacuum so nothing is left bridging the cavity.
Most Bath calls come from people who cannot sell, remortgage or insure a property because of spray foam in the walls. Lenders treat it like a defect until it is removed and documented. We also see trapped moisture and rot around lintels in older terraces, and insulation contamination where foam has mixed with old mineral wool. If you have been searching cavity wall spray foam removal near me Bath and getting vague answers, we will tell you straight what your walls need.
Why Bath homeowners book this work
Removing injected foam is not a cosmetic job. It protects the structure, unblocks a sale or remortgage, and puts your cavity back into a condition a surveyor will accept. Here is what you actually gain.
Unblocks mortgage and sale
Mortgage refusal due to spray foam is the single most common reason people call us in Bath. Once the foam is out and we have documented the cavity condition with photographs, your lender or buyer's surveyor has something concrete to work with. We have supported sales in Combe Down and Bear Flat where the chain had already stalled twice.
Stops trapped moisture and rot
Injected foam can seal the cavity and hold water against wall ties, lintels and embedded timber. Left alone, that becomes cavity wall damp and structural timber damage. Extraction reopens the cavity so it can drain and ventilate the way it was designed to, which is the only reliable fix for damp that keeps coming back.
Removes smell and fumes
Some foams give off a persistent chemical odour, especially in warm weather or when they have been wet. Spray foam smell and fumes in a bedroom or hallway is a genuine health and comfort issue. We remove the source, ventilate the cavity and confirm with a moisture meter and thermal imaging camera that the wall has dried out.
Prepares walls for proper insulation
Once the cavity is clean, it can be reinsulated correctly with a BBA certificate approved system, or left clear if that suits the building. On solid stone and rubble-filled walls around Larkhall and Weston, we often recommend leaving the cavity open and insulating internally or externally instead. You get an honest recommendation, not a sales pitch.
How our cavity wall foam extraction in Bath works
Every job follows the same five stages. You will know what is happening, when, and what it costs before we start cutting.
Survey and assessment
We start with a boroscope inspection camera pushed through the existing injection holes to see how far the foam has spread and whether it is open cell spray foam or closed cell spray foam. A thermal imaging camera and moisture meter tell us where damp is sitting. This visit takes 45 to 90 minutes and gives you a fixed price.
Protection and setup
On the day, we lay dust sheets and protective sheeting through the house, seal doorways and set up a dust extraction unit vented outside. Technicians wear full PPE respirator kit. On a typical three-bedroom Bath terrace, setup takes about an hour before any cutting begins.
Foam extraction
We open the cavity through the existing holes or cut new access points, then remove the foam in sections using reciprocating saws, oscillating multi-tools and a chisel and scraper set. Stubborn or brittle foam is broken down with a dry ice blasting machine, which freezes it so it releases cleanly without damaging the brickwork.
Cleaning and inspection
Every cavity is vacuumed with an industrial vacuum and HEPA filter vacuum, then inspected again with the boroscope to confirm no foam, dust or debris is left bridging the gap. We check wall ties and look for any timber that needs attention. A standard semi-detached house takes one to two days for this stage.
Making good and handover
We repoint or plug the access holes with matching mortar, seal where needed and leave the walls tidy. You receive a photographic record of the cavity before, during and after, plus a written summary you can hand to a lender or surveyor. Most Bath jobs are finished within three to five working days.
Five years of specialist foam removal
Platinum Shield Spray Foam has been removing spray foam across Bath and Somerset since 2021. In that time we have worked on everything from two-up-two-down terraces in Twerton to large detached homes on Lansdown. Our technicians hold NVQ Level 2 Insulation and CITB training, and we work to PASMA and SafeContractor standards on every site. We are TrustMark registered and a Which? Trusted Trader, and we carry full insurance for work in occupied homes. We have handled lender-driven removals, insurance claims and pre-purchase surveys, so we know what documentation a surveyor expects to see.
- NVQ Level 2 Insulation qualified technicians on every cavity wall job.
- TrustMark registered and Which? Trusted Trader approved for work in occupied homes.
- CHAS and Constructionline accredited, with SafeContractor and PASMA compliance on site.
- Experienced with Isothane, Soudal, BASF, Huntsman, Dow and Recticel foam systems.
- We provide photographic cavity records accepted by mortgage lenders and surveyors.
Why Bath chooses our cavity wall spray foam removal
We only do foam removal and insulation work. That focus means we have seen almost every way injected foam can fail in a Bath property, and we know how to get it out without wrecking your walls.
Fixed price, no surprises
You get a written fixed price after the survey, based on the actual volume of foam and the access needed. No hourly creep, no extras added mid-job. If we find something unexpected behind the plaster, we stop and talk to you before doing anything that changes the cost.
Lender-ready documentation
We photograph the cavity at every stage and provide a written summary of what was removed and what condition the walls were left in. Surveyors and lenders in Bath accept our reports because they show the cavity clear, the ties visible and the moisture readings recorded.
Dust-controlled working
Foam removal is messy work if it is done badly. We use a dust extraction unit, HEPA filter vacuum and sealed sheeting so your kitchen, carpets and furniture stay usable. Most customers stay in the house while we work, and we clean up at the end of every day.
Affordable cavity wall insulation removal Bath Somerset
We keep pricing realistic for Bath homeowners and landlords, and we will tell you if a cheaper partial removal is genuinely suitable. If the foam is only in one elevation, we quote for that elevation. You should not pay to strip a wall that does not need stripping.
What our cavity wall spray foam removal includes
Every cavity wall foam removal service Bath job includes the survey, the extraction, the clean-up and the documentation. What varies is the access needed and how much making good is required. We agree that with you before we start, so the price you are quoted is the price you pay.
Full cavity survey
A boroscope inspection camera, thermal imaging camera and moisture meter are used to map the foam and identify damp. You get a written summary of what is in the walls and a fixed price for removal.
Foam extraction and cavity clean
All accessible foam is cut out with reciprocating saws, oscillating multi-tools and dry ice blasting where needed. The cavity is then vacuumed with an industrial vacuum and HEPA filter vacuum until it is clear.
Dust control and protection
Dust sheets, protective sheeting and a dust extraction unit are set up before work starts. Doorways are sealed and the work area is cleaned at the end of each day so the house stays usable.
Making good of access holes
Injection holes and any new access points are repointed or plugged with matching mortar. On Bath stone and older brickwork we match the finish as closely as possible so the repair blends in.
Photographic documentation
You receive before, during and after photographs of the cavity, plus a written record of moisture readings. This is the pack lenders and surveyors ask for when foam has been removed.
Reinsulation advice
Once the cavity is clear, we advise on whether it should be left open or reinsulated with a BBA certificate approved system. On solid stone walls, internal or external insulation is often the better route.
Problems our cavity wall foam removal in Bath solves
Injected foam causes a predictable set of problems in Bath properties. Here are the ones we are called out for most often, and what happens if they are left alone.
Mortgage refused because of spray foam
The sale stalls, the chain collapses and you may lose your buyer. Lenders treat undocumented foam as a defect until it is removed and evidenced.
We remove the foam, document the cavity condition with photographs and moisture readings, and give you a report your lender or buyer's surveyor can work from. Most Bath sales we support complete within weeks of removal.
Damp and rot around wall ties and lintels
Trapped moisture corrodes wall ties and rots embedded timber. Left for years, it can mean structural timber damage and much more expensive repairs.
We open the cavity, remove the foam that is holding water and check the ties and timber with a boroscope. The cavity is then left able to drain and ventilate, which is the only lasting fix for recurring damp.
Persistent chemical smell and fumes
Spray foam smell and fumes can make bedrooms unusable and cause headaches. The odour often gets worse in warm weather or after the wall has been wet.
We remove the foam at source, ventilate the cavity and confirm with a moisture meter and thermal imaging camera that the wall has dried. Customers in Combe Down and Widcombe have reported the smell gone within days of extraction.
Foam mixed with old insulation
Insulation contamination makes it impossible to reinsulate properly and confuses surveyors assessing the wall. It also hides damp that would otherwise be visible.
We separate and remove all materials in one programme, including old mineral wool and foam residue. The cavity is then clean and ready for a BBA certificate approved insulation system, or left open if that suits the building.
When Bath homeowners call us for foam removal
A buyer's surveyor has flagged injected foam in the cavity wall and the lender wants it gone before completion.
We survey within days, quote a fixed price and schedule the removal around your completion date. The cavity is cleared, made good and documented with photographs and moisture readings.
The lender has the evidence it needs, the buyer is satisfied and the sale proceeds without further delay.
You have noticed damp patches on an internal wall and a musty smell in a ground-floor room of your Bath terrace.
We use a boroscope and moisture meter to confirm whether foam is trapping water against the wall. If it is, we remove it, clean the cavity and check the wall ties and timber at the same time.
The wall dries out, the smell goes and you avoid the far bigger cost of replacing rotten lintels or floor timbers.
You are remortgaging a rental property in Oldfield Park and the valuer has raised the foam as a concern.
We handle the removal with minimal disruption to tenants, working room by room and cleaning up daily. A full documentation pack is issued at handover for the lender.
The remortgage completes and the property is left in a condition that will not trigger the same question at the next valuation.
You have inherited a property in Twerton with foam in the walls and no paperwork explaining what was installed.
We carry out a full insulation assessment, identify the foam type and extent, and advise honestly whether removal is necessary or whether the cavity can be left alone.
You know exactly what you own, what it will cost to fix and what a future buyer or lender is likely to ask.
Tools and methods we use for foam extraction
Tools & Equipment
Boroscope inspection camera
Pushed through existing injection holes to see the foam, wall ties and any damp inside the cavity before we commit to a removal plan.
Thermal imaging camera
Maps cold spots and moisture patterns through the wall so we know where foam is bridging the cavity and where damp is sitting.
Moisture meter
Gives us readings before and after removal, so you can see the wall drying out and lenders have a measurable record.
Dry ice blasting machine
Freezes brittle or tightly bonded foam with dry ice pellets so it releases from brick and mortar without abrasive damage.
Reciprocating saw and oscillating multi-tool
Cuts foam into manageable sections inside the cavity, including dense closed cell spray foam that will not pull out by hand.
Industrial vacuum and HEPA filter vacuum
Removes foam dust, debris and residue from the cavity and keeps airborne particles out of your living space.
Dust extraction unit and PPE respirator
Controls dust at the source and protects our technicians, which matters on every occupied-home job in Bath.
Methods
Dry ice blasting
Dry ice pellets are blasted at the foam, freezing it so it becomes brittle and releases cleanly from the substrate. It is our preferred method on older Bath stonework because it does not abrade the brick or mortar.
Mechanical extraction
Reciprocating saws, oscillating multi-tools and a chisel and scraper set are used to cut and lift foam in sections. This is the standard approach for open cell spray foam and for foam that has not fully bonded.
Controlled abrasive blasting
Where residue is stubborn on hard surfaces, we use sand blasting equipment with abrasive blasting media. It is used sparingly, always with dust extraction and protective sheeting, and only where the substrate can take it.
Cavity cleaning and verification
After extraction, the cavity is vacuumed and re-inspected with a boroscope. We check wall ties, look for timber damage and record moisture readings so the wall is verified clear before making good.
How cavity wall foam extraction runs in Bath
Bath is a city of mixed building stock, and that shapes how we work. You have solid stone and rubble-filled walls in the older terraces around Widcombe and Larkhall, 1930s brick semis in Oldfield Park and Weston, and modern timber-frame and blockwork builds in Kingsmead and the riverside developments. Injected foam behaves differently in each. On solid stone walls, foam often sits in a shallow drilled pocket and can be removed with hand tools and dry ice blasting. On brick cavities, closed cell spray foam can bridge the full width and needs cutting out in sections. Bath's damp climate makes it worse: the city sits in a valley with high rainfall and poor drying conditions, so foam that traps moisture against wall ties causes corrosion and rot faster here than in drier parts of the country. We also work around Bath and North East Somerset conservation area requirements, matching mortar and finish on visible elevations. If you need cavity wall foam extraction in Bath Somerset, expect a survey first, then three to five working days on site for a typical house.
Service Areas
Older terraces with solid stone walls and shallow cavities. Foam is often in drilled pockets and can be removed without cutting new access points.
1930s brick semis with genuine cavities. Closed cell foam here tends to bridge the full width and needs section-by-section extraction.
Former quarry area with a mix of stone and brick. Damp readings here are often higher because of the local ground conditions.
Dense terraced housing where we frequently work on lender-driven removals before a sale completes.
Larger detached properties with deeper cavities and more foam volume, so jobs take longer and need more documentation.
Local Considerations
High rainfall and slow drying in the Avon valley
Foam that traps water causes corrosion and rot faster here than in drier regions. We always record moisture readings before and after so you can see the wall drying out.
Conservation areas and listed buildings
Visible elevations need matching mortar and careful making good. We plan access points to minimise the visual impact and match the existing finish.
Mixed solid stone and brick cavity construction
Removal method is chosen per wall. Solid stone gets hand tools and dry ice blasting; true brick cavities get mechanical extraction and full vacuum cleaning.
Widcombe terrace unblocked for sale
A three-bedroom terrace in Widcombe had injected foam in the front elevation, flagged by a buyer's surveyor. The sale had already fallen through once, and the lender would not proceed until the foam was removed and documented.
We removed the foam in four working days, cleaned the cavity, checked the wall ties and repointed the access holes with matching mortar. Moisture readings dropped from 22% to 14% within two weeks, and the sale completed the following month.
Maintenance & Follow-up
We advised leaving the cavity open rather than reinsulating, given the solid stone construction. An annual damp check on the front wall is all that is needed.
A landlord with three rental properties in Oldfield Park could not remortgage because two of the houses had closed cell spray foam in the cavity walls. Tenants were in place and the lender wanted evidence the foam had been properly removed.
We worked through both properties room by room over eight days, keeping the tenants in situ. Each cavity was cleared, vacuumed and photographed, and the landlord received a full documentation pack. The remortgage completed three weeks later.
Maintenance & Follow-up
The cavities were left clear and ventilated. We recommended a five-yearly boroscope check at the next survey to confirm the ties remain in good condition.
A family in Combe Down had a chemical smell in a back bedroom for two years and rising damp on the internal wall. Previous trades had treated the damp with injection cream, which made no difference because the cavity foam was holding water against the wall.
We removed the foam, dried the cavity and confirmed with a thermal imaging camera that the wall was drying evenly. The smell disappeared within days and moisture readings returned to normal within a fortnight. No further damp treatment was needed.
Maintenance & Follow-up
We advised keeping the bedroom ventilated and checking the external mortar joints each spring. No foam remains in the cavity, so the wall can now dry naturally.
Frequently asked questions about cavity wall foam removal in Bath
Have questions? We have answers.
Call UsHow much does cavity wall spray foam removal cost in Bath?
Typical 2026 pricing in Bath runs from around £1,800 for a single elevation on a small terrace to £6,500 or more for a full detached house with dense closed cell foam. The main drivers are the volume of foam, how hard it is to break down, and how much making good is needed. We give a fixed price after a survey, so you are not guessing.
Can you remove cavity wall spray foam in Bath, Somerset?
Yes. We remove injected open cell and closed cell foam from cavity walls across Bath and Somerset, including Twerton, Odd Down, Combe Down and Bathwick. We use reciprocating saws, oscillating multi-tools and dry ice blasting to break the foam down, then vacuum the cavity clean. Most jobs take three to five working days.
Is cavity wall foam extraction near me available in Bath?
We cover the whole of Bath and the surrounding villages, and we can usually survey within a few days of your call. For urgent cases, such as a stalled house sale or a lender deadline, we offer 24/7 cavity wall spray foam removal Bath appointments. Call 0122 528 5137 and we will book you in.
Does cavity wall spray foam removal require rebuilding walls in Bath?
No, in almost every case the walls stay standing. We work through the original injection holes or cut small access points, remove the foam, clean the cavity and then repoint or plug the holes with matching mortar. Rebuilding is only needed if the foam has caused serious structural timber damage, which is rare and would be identified at survey.
Accredited, insured and documented
Certifications
Reviews
Surveyed our Widcombe terrace on a Tuesday and had the foam out by Friday. The photographic report was exactly what our buyer's surveyor wanted. Clean, tidy and they explained every stage.
We had three rental properties with foam and a lender who would not budge. Platinum Shield worked through them one by one and kept the tenants happy. The 24/7 line was answered when I called on a Sunday.
Chemical smell in the back bedroom for two years. They found the foam in the cavity, removed it and the smell was gone within days. Moisture readings proved the wall had dried out.
Honest advice from the first visit. They told us one elevation did not need stripping and saved us money. The work they did do was done properly and the cavity was spotless.
Related services we provide in Bath
Spray Foam Removal near me
If you need spray foam removal near me in Bath, we cover the whole city and surrounding Somerset villages. This is the parent service that includes cavity wall, loft and roof foam removal, all handled by the same trained team.
Spray Foam Removal near mesame day Spray Foam Removal
When a surveyor is coming or a sale is about to collapse, we can sometimes mobilise the same day for spray foam removal in Bath. Call before 10am and we will tell you honestly whether a same-day visit is possible.
same day Spray Foam Removal24/7 Spray Foam Removal
For urgent lender deadlines and emergency situations, we offer 24/7 spray foam removal Bath callouts. The phone line is answered around the clock, and we will arrange the earliest realistic survey slot for your property.
24/7 Spray Foam RemovalResidential Spray Foam Removal
Most of our cavity wall foam extraction Bath Somerset work is on occupied homes. We protect floors, furniture and fittings, work room by room, and keep the house liveable while we remove foam from your walls.
Residential Spray Foam RemovalCommercial Spray Foam Removal
We also remove foam from commercial premises in and around Bath, including offices, workshops and rented units. Work is scheduled around your trading hours, with out-of-hours options for businesses that cannot close during the day.
Commercial Spray Foam Removalloft spray foam removal
Loft foam and cavity foam often go together in Bath properties. If the loft has been sprayed as well, we remove it in the same programme so the whole building is documented and cleared in one go.
loft spray foam removalroof spray foam removal
Foam sprayed directly onto roof timbers traps heat and moisture and can void roof ventilation. We remove it carefully from rafters and sarking, then check the timber with a moisture meter before advising on next steps.
roof spray foam removalAttic spray foam removal
Attic spray foam removal in Bath is usually driven by survey findings or condensation problems. We strip the foam, clean the timbers and restore airflow so the attic can dry out properly.
Attic spray foam removalspray foam insulation removal
As a general spray foam insulation removal service, we handle mixed installations where cavity, loft and floor foam have all been applied. You get one survey, one programme and one set of documentation.
spray foam insulation removalopen cell spray foam removal
Open cell spray foam is softer and often easier to remove, but it still traps moisture if it has been injected into a cavity. We extract it with hand tools and vacuum equipment, then confirm the cavity is clear with a boroscope.
open cell spray foam removalclosed cell spray foam removal
Closed cell spray foam is dense and rigid, and it is the type most likely to cause mortgage refusal due to spray foam. We break it down with dry ice blasting and reciprocating saws, section by section, without damaging the brickwork.
closed cell spray foam removalmortgage lender spray foam removal
If your lender has flagged spray foam, we carry out the removal and provide the photographic and written evidence they need. This is the most common reason Bath homeowners contact us, and we know what surveyors look for.
mortgage lender spray foam removalinsulation removal service
Our insulation removal service covers foam, old mineral wool and contaminated insulation in the same visit. If the cavity contains a mix of materials, we separate and remove everything so it can be reinsulated correctly.
insulation removal serviceinsulation assessment
Before any removal, we carry out an insulation assessment using a boroscope inspection camera, thermal imaging camera and moisture meter. This tells you exactly what is in the walls and whether removal is genuinely necessary.
insulation assessmentdry ice blasting spray foam removal
Dry ice blasting is our preferred method for brittle or tightly bonded foam. Dry ice pellets freeze the foam so it releases from the brick and mortar without abrasive damage, which matters on older Bath stonework.
dry ice blasting spray foam removalsand blasting spray foam insulation removal
For stubborn residue on hard surfaces, we use sand blasting equipment with controlled abrasive blasting media. It is used sparingly and only where the substrate can take it, always with full dust extraction.
sand blasting spray foam insulation removalthermal spray foam removal
Thermal spray foam removal covers foam that has been applied in layers or has cured unevenly. We use thermal imaging to map the foam before cutting, so we remove all of it rather than just the visible sections.
thermal spray foam removalenvironmentally friendly insulation removal
We dispose of removed foam through licensed waste routes and keep dust and debris contained on site. Where possible, cavity materials are separated for recycling rather than going straight to landfill.
environmentally friendly insulation removalWarehouse spray Foam removal
Warehouse spray foam removal in and around Bath is scheduled around your operations. We work in bays, use industrial vacuum equipment and keep access routes clear so your staff can keep working safely.
Warehouse spray Foam removalBook cavity wall spray foam removal in Bath today
If a lender, buyer or surveyor has raised concerns about foam in your walls, do not wait for the chain to collapse. We survey, quote and remove, with documentation your lender will accept. Call 0122 528 5137 and we will book your assessment.