Certified extraction, clean timber, mortgage-ready reports
Closed Cell Spray Foam Removal in London
Closed Cell Spray Foam Removal in London is the specialist job of stripping rigid polyurethane foam from rafters, lofts and cavity walls without wrecking the timber underneath. We handle closed cell foam extraction in London Greater for homeowners, landlords and buyers stuck with a mortgage refusal. If a surveyor has flagged spray foam, or your loft is sweating through another damp October, we assess it, cut it out and leave the roof structure ready for a proper insulation spec.
Live phone supportUpfront optionsBacked workmanship
What's included
What Our Closed Cell Removal Includes
Our standard price covers survey, containment, extraction, timber treatment and the written report. There are a few things that sit outside the standard scope, such as full roof repairs or new insulation installation, and we flag those at survey so there are no surprises.
Free Loft Survey
A technician gets into the loft, measures foam depth and coverage, checks timber moisture with a moisture meter and takes photos. You get a fixed written quote the same day, valid for 30 days.
Dust-Controlled Extraction
Sealed hatch, sheeted stairs and floors, and a dust extraction unit running to the van. We cut the foam out with an oscillating multi-tool and reciprocating saw, then blast residue back to bare timber.
Timber Inspection and Treatment
Every rafter is checked by hand for softness, staining and structural timber damage. Affected timber is treated with Envirograf products, and anything beyond our scope is photographed and explained.
Waste Removal and Disposal
Foam, dust and packaging are bagged on site and removed the same day. Where possible we separate materials for recycling rather than sending everything to landfill.
Written Removal Report
Before-and-after photos, moisture readings, products used and a plain-English summary of the roof condition. This is the document lenders, surveyors and insurers ask to see.
Service overview
What Closed Cell Spray Foam Removal in London Involves
Closed cell spray foam is the dense, rigid polyurethane version, and it behaves differently to the soft open cell stuff. It sets like a hard shell, bonds to timber and tile battens, and traps moisture rather than letting the roof breathe. Removing it means cutting it back in controlled sections with an oscillating multi-tool and reciprocating saw, then blasting the residue off with a dry ice blasting machine or sand blasting equipment. We use a dust extraction unit and PPE respirator on every job because cured isocyanate dust is not something you want floating through a family home.
Most London calls we take are not about insulation performance at all. They are about a mortgage refusal due to spray foam, a surveyor's report, or a loft that has started to smell damp after a wet winter. Closed cell insulation removal in London is trickier than elsewhere because so much of the housing stock is Victorian or Edwardian with old rafters, shallow lofts and no vapour barrier. If you have been quoted for closed cell spray foam removal in London near me and the price looked vague, it is usually because nobody has been up there with a moisture meter yet.
How we workWe verify the cause, compare realistic options, and confirm the repair before we leave.
The service timeline
How Our Removal Process Runs
The process flexes to the condition, but these checkpoints keep decisions clear.
Survey and Quote
We come out, get into the loft, and check the foam depth, coverage and timber condition with a thermal imaging camera and moisture meter. You get photos and a fixed price the same day. Most surveys take 45 to 60 minutes, and there is no charge for the visit.
Containment Setup
Before any cutting starts we seal the loft hatch, lay sheeting over floors and stairs, and set up the dust extraction unit. On terraced London houses we run the extractor hose out to the van so dust never travels through the bedrooms. Setup usually takes 30 to 45 minutes.
Foam Extraction
We cut the closed cell foam into manageable sections with an oscillating multi-tool and reciprocating saw, then blast the bonded residue off the rafters with a dry ice blasting machine. A typical 3-bed loft takes one to two days. Every rafter gets checked by hand before we move on.
Timber Treatment
Once the foam is gone we inspect for structural timber damage and treat any affected timber with Envirograf products. If the roof felt or battens need attention we tell you straight away rather than burying it in a report. Drying typically takes 5 to 10 days depending on the season.
Report and Handover
You receive a written removal report with before-and-after photos, moisture readings and a statement of the products used. This is the document mortgage lenders and surveyors want to see. We walk you through it on site and email the PDF the same day.
Tools & methods
Tools and Methods We Use
Purpose-built equipment, used by trained technicians, so the job is done accurately the first time.
Dry Ice Blasting Machine
Lifts bonded foam residue off rafters and steelwork without gouging the timber. Leaves no secondary blasting media to sweep up, which keeps the loft clean.
Oscillating Multi-Tool
Cuts closed cell foam into manageable sections in tight loft spaces where a saw will not fit. Controlled enough to work close to cables and pipework.
Reciprocating Saw
Takes down thicker foam sections and stubborn patches on rafters and trusses. Used with a fine blade to limit timber damage.
Dust Extraction Unit
Runs continuously during cutting and blasting, pulling foam dust out to the van. This is what keeps bedrooms and landings free of isocyanate dust.
Thermal Imaging Camera
Finds hidden moisture pockets and cold bridges behind foam during the survey. Shows us where the roof is failing before we cut anything.
Moisture Meter
Takes timber readings before and after removal. The before-and-after numbers go straight into your written report for the lender.
PPE Respirator
Mandatory for every technician on site. Cured isocyanate and polyurethane dust is not something to breathe, and we treat it that way.
Use cases
When to Book Closed Cell Removal
These examples show how the service framework adapts rather than forcing every call through one repair.
Croydon Roof Void Dried Out
A 1930s semi with foam in the roof void and a damp smell in the top-floor bedrooms. Mould was forming on stored boxes and one rafter had started to soften at the eaves. → Foam cut out and blasted back to bare timber over three days. The softened rafter was replaced by a roofer we recommended, and readings dropped from 22% to 14% in a fortnight.
Canary Wharf Warehouse Overspray Removed
A warehouse roof void with foam overspray across steelwork and condensation dripping onto palletised stock. Insurers had flagged the moisture and the operator was losing stock weekly. → Night-shift removal using dry ice blasting on the steel, with full containment. Drips stopped immediately and moisture readings fell from 22% to 14% within two weeks.
Problems we solve
Problems We Solve for London Homeowners
Closed cell foam causes a predictable set of problems in London homes. If any of these sound familiar, a survey will tell you within an hour whether removal is the right call.
Mortgage refused because of spray foam
We remove the foam, document the rafters and produce a lender-ready report. Most buyers we help complete within four to six weeks of the report being issued, and we can usually survey within 48 hours of your call.
Loft condensation and damp patches
We strip the foam, clear the eaves vents and restore airflow through the loft. Moisture readings typically fall within two weeks, and we treat any mould-affected timber before we leave.
Roof rot from trapped moisture
We cut the foam back, expose the affected timber and treat what is salvageable with Envirograf. Where rafters need replacing, we tell you exactly which ones and hand the job to a roofer with photos and measurements.
Spray foam overspray on cables and pipework
We remove overspray carefully around services, using hand tools and dry ice blasting rather than aggressive cutting. Cables and pipes are left clean and accessible for the next trade who needs them.
Pricing process
What Removal Costs in 2026
£1,800 - £6,000+ depending on scope
Foam Thickness
Closed cell foam is often sprayed 50mm to 150mm deep. Thicker foam takes longer to cut, generates more waste and needs more blasting time, which pushes the price up.
Loft Access
A wide hatch and boarded loft is quick to work in. A narrow hatch, low pitch or a loft full of stored items adds setup and labour time, and that shows in the quote.
Timber Condition
Sound rafters just need cleaning and treatment. Soft, stained or rotten timber needs replacement by a roofer, which we flag at survey so you can budget for it separately.
How much does closed cell spray foam removal cost in London?
Most London lofts run £1,800 to £4,500 in 2026, with larger roofs or cavity wall foam pushing past £6,000. Price depends on foam thickness, loft access, how much timber treatment is needed and whether the job is residential or commercial. We give a fixed quote after a free survey, so you are not guessing from a phone estimate.
Do you offer closed cell foam extraction in London Greater?
Yes. We cover all 32 London boroughs plus the City of London, from Croydon and Bromley in the south to Enfield and Barnet in the north. Same-day surveys are usually available, and we can have a crew on site within 48 hours for urgent mortgage or sale deadlines. Call 02080885347 to book a slot.
Is closed cell spray foam removal covered by insurance in London?
Sometimes. Buildings insurance may cover removal if the foam was installed incorrectly and caused damage, such as roof rot from trapped moisture or structural timber damage. Most policies will not pay just because a lender dislikes the foam. We provide the photos, moisture readings and written report your insurer will ask for.
How long does closed cell spray foam removal take in London?
A standard three-bedroom loft takes one to two working days for extraction, with timber drying over the following 5 to 10 days. Larger roofs, cavity wall foam or heavy overspray can take three to four days. We confirm the schedule at survey and keep you updated each afternoon.
Related services
Related Services
Spray Foam Removal near me
Our general spray foam removal service covers open cell, closed cell and mixed foam in the same visit. If you are not sure which type you have, we identify it at survey and quote accordingly.
Same day Spray Foam Removal
For urgent mortgage deadlines or a sale about to fall through, we can sometimes mobilise a crew the same day. Call before 10am and we will tell you honestly whether it is possible.
24/7 Spray Foam Removal
Emergency call-outs for active leaks, storm damage or foam that has started to fail. We answer the phone around the clock and dispatch where access and safety allow.Ready when you are
Book Closed Cell Spray Foam Removal in London
Send us a photo of your loft or book a free survey and we will tell you exactly what needs to come out, what it will cost and how long it will take. Fixed price, dust-controlled, mortgage-ready report included. Call 02080885347.
Talk with the local team
Request Closed Cell Spray Foam Removal
Call us on 020 8088 5347 or email [email protected] and we will book your free survey. We answer the phone from 8am to 6pm Monday to Friday, and our 24/7 line covers emergencies. Most London surveys happen within 48 hours of your call, and you get a fixed written price the same day.