Insulation Assessment in London, Greater London You Can Act On
An Insulation Assessment in London, Greater London tells you whether the spray foam in your loft, roof or cavity is doing its job or quietly causing damage. We inspect the timbers, check for trapped moisture and confirm whether the installation meets Building Regulations Part L. If you are buying, selling or remortgaging a property, this insulation survey London Greater London gives you written answers before a lender or surveyor raises a problem.
Service overview
What an Insulation Assessment in London, Greater London Covers
An Insulation Assessment in London, Greater London is a documented inspection of the insulation already installed in your property, carried out to establish whether it is performing, compliant and safe. We open up loft hatches, check roof voids, look behind insulation boards and vapour barrier layers, and test timber moisture with calibrated meters. You get photographs, moisture readings and a plain-English verdict on open cell spray foam, closed cell spray foam or older polyurethane foam, plus what needs to happen next. Most London callers come to us for one of three reasons: a mortgage lender has flagged spray foam insulation failing building regulations, a surveyor has noted attic condensation from spray foam, or a homeowner has spotted roof timber rot from trapped moisture. Because London roofs are often tight, low-pitched and hard to ventilate, problems show up faster here than in rural properties. If you have been searching for an insulation assessment near me London and want a straight answer rather than a sales pitch, we inspect first and recommend second.
! Problems we solve
Mortgage lender refuses to lend on a spray-foamed roof
The sale stalls, the chain collapses and you may lose your buyer unless you can produce documented evidence about the installation.
Damp patches and condensation appearing in the loft
Left alone, attic condensation from spray foam soaks into rafters and battens, leading to mould, timber decay and eventually structural repairs.
Foam installed without building control sign-off
Non compliant loft insulation can make a property difficult to sell and may require remedial work before a mortgage completes.
Scope of work
What Our Insulation Assessment Includes
Every assessment covers the same core checks, so you know exactly what you are paying for. If your property needs something extra, such as cavity wall inspection or a commercial roof survey, we tell you before we book rather than adding it to the invoice afterwards.
-
01
Full loft and roof inspection
We check the loft, roof void, eaves and any accessible cavity, photograph the foam and record where it has been applied. Access points are opened with hand tools and closed again before we leave.
-
02
Timber moisture readings
Calibrated meters give us moisture content at rafters, purlins and battens. Readings above 20 percent indicate trapped moisture and are flagged in the report with the exact location and value.
-
03
Compliance check against Part L
We compare the installation with Building Regulations Part L and ventilation guidance, and state clearly whether the foam is compliant, borderline or failing. This is the section lenders and solicitors rely on.
-
04
Written report with photographs
You receive a documented report within 24 hours, including images, moisture figures, foam type and a recommended course of action. It is written to be read by a homeowner, a lender or a builder.
Why London Homeowners Book an Insulation Assessment
An assessment turns guesswork into a clear picture. You learn whether the foam in your roof is helping, harming or simply sitting there, and you get the evidence you need for lenders, buyers and builders.
Book nowTools and Methods We Use
Calibrated moisture meters
Used on rafters, purlins and battens to record timber moisture content. Readings above 20 percent indicate trapped moisture and are logged with their exact location.
Borescope inspection camera
Lets us see behind insulation boards, vapour barrier layers and into tight eaves without opening large sections of the roof structure.
Oscillating multi-tool
Opens small inspection points in boards and plasterboard cleanly, so we can check what is behind them and close the access neatly afterwards.
PPE respirator and air scrubber
Protects our technicians and your property during inspection and any removal, keeping dust and foam particles contained within the work area.
Local execution
London properties behave differently from the rest of the country. Most of the housing stock is Victorian or Edwardian terraces with low-pitched roofs, converted lofts and tight eaves that were never designed for modern insulation. When spray foam is applied in those voids, it often blocks the ventilation path that keeps timbers dry. Add a damp London winter and you get condensation forming on the underside of the roof covering, which then soaks into the rafters. We see this pattern constantly in Islington, Hackney, Southwark and Lambeth. Our insulation inspection London service accounts for it by checking ventilation as carefully as the foam itself. If you need to know how to get an insulation assessment London-wide, we cover every borough and can usually attend within 24 to 48 hours, with same day slots available when you call before midday.
How Insulation Assessment Works Across London
- • Islington
- • Canary Wharf
- • Croydon
- • Hackney
Before and after
Same-Day and 24/7 Insulation Assessment in London
When you need answers quickly
Our phone line is open 24 hours a day, and we answer calls rather than routing you to a message service. For standard assessments we typically attend within 24 to 48 hours of booking, and same day insulation assessment London appointments are often available if you call before midday. Our crews work in pairs, with a third technician joining for larger roofs or commercial premises. Each van carries moisture meters, a borescope camera, an oscillating multi-tool, PPE respirators and an air scrubber, so we can inspect and, where needed, begin containment on the first visit. If a lender deadline or a completion date is pressing, tell us when you call and we will prioritise the booking. We also handle 24/7 insulation assessment London enquiries for urgent cases such as active water ingress or a collapsed section of foam.
How Our Insulation Assessment Works
Book your visit
Call 02080885345 or send us the property address and the reason for the assessment. We ask whether a lender, surveyor or buyer is involved, because that shapes the report. Same day insulation assessment London slots are often available, and we can arrange access around tenants, estate agents or your own working day.
On-site inspection
Our technician arrives with a PPE respirator, moisture meters, a borescope camera and an oscillating multi-tool for opening small inspection points. We check the loft, roof void, eaves and any cavity wall insulation, photograph what we find and take moisture readings at multiple timbers. A typical domestic assessment takes 60 to 90 minutes.
Foam and timber testing
We identify whether the foam is open cell spray foam, closed cell spray foam or an older polyurethane product, and note the brand where it is visible, such as Icynene, Lapolla or BASF. We test adhesion, look for shrinkage and check whether a vapour barrier is present and intact. Any isocyanate or polyol resin residue is recorded too.
Insulation Assessment Pricing in London
Typical 2026 pricing for an insulation assessment in London, Greater London runs from 180 to 420 pounds for a domestic property, with commercial and large-span roofs quoted individually. The fee covers the site visit, moisture testing, photographs and a written report. What moves the price is access, property size and how much of the roof void needs opening up. We confirm the figure before booking, and if the assessment leads to removal work, we credit the assessment fee against the removal quote.
Property size and roof area
A standard terraced loft takes less time than a detached house with multiple roof voids or a large commercial span. We measure the accessible area and price from that, so you are not paying for space we never inspect.
Access and loft condition
Boarded lofts, restricted headroom and narrow hatches all slow the inspection. Where access is genuinely difficult, we may need to open additional inspection points, which adds time and a small amount to the cost.
Reporting requirements
A straightforward homeowner report is quicker to produce than documentation for a lender, solicitor or insurer. If your report needs to address specific lender concerns or include a formal compliance statement, tell us when you book.
Insulation Assessment Questions, Answered
How much does an insulation assessment cost in London?
Most domestic insulation assessments in London cost between 180 and 420 pounds, depending on property size and access. A standard loft or roof void sits at the lower end. Larger roofs, multiple voids or commercial premises push it higher. The fee covers the site visit, moisture testing, photographs and a written report, and we confirm the price before we book you in.
What happens during an insulation assessment in London?
A technician inspects the loft, roof void and any cavity wall insulation, takes moisture readings from timbers, photographs the foam and checks it against Building Regulations Part L. The visit usually takes 60 to 90 minutes. You get a written report within 24 hours setting out condition, compliance and whether removal or ventilation work is needed.
Do I need an insulation assessment in Greater London?
You need one if a lender, buyer or surveyor has raised spray foam as a concern, if you have noticed damp or condensation in the loft, or if you are selling a property with foam installed. An assessment gives you documented evidence either way. If the foam is sound, the report proves it. If it is not, you know the scope before you commit to anything.
How long does an insulation assessment take in London?
The on-site inspection takes 60 to 90 minutes for a typical London home, and you receive the written report within 24 hours. Larger properties, multiple roof voids or commercial buildings can take two to three hours. Booking a same day insulation assessment London slot is often possible if you call before midday.
Related services
Spray Foam Removal near me
If your assessment finds failing foam, our local removal team strips it out and leaves the loft clean. We cover every London postcode and quote from the same report you already have.
Same day Spray Foam Removal
When a lender or buyer needs the foam gone quickly, we can often assess and remove on the same day. Call before midday and we will confirm what is possible for your property.