For many Kent homeowners, the garage is that trusty space for storing garden tools, keeping the car dry, or hiding Christmas decorations for eleven months of the year. But if your home was built before the year 2000, that familiar corrugated roof might be hiding a less welcome secret: asbestos.
The good news is that asbestos in a garage roof isn’t necessarily a disaster. It might be perfectly safe left alone. But the moment you plan a renovation, spot a crack, or see light peeking through, you need to know what you’re dealing with. If you’re unsure about your garage roof and want a professional to take a look, call All About Asbestos on 01843 600765 for a free, no‑obligation consultation today.
The safest way to deal with a suspect garage roof? Stop guessing, get it tested, and let the facts decide the next move.
Common Materials in Asbestos Garage Roofs
Asbestos cement was once prized for garage roofs because it was lightweight, durable, fire‑resistant, and cheap. That combination made it the go‑to choice for thousands of garages across Kent and the wider UK, particularly from the 1950s through to the 1980s. The vast majority of asbestos garage roofs are made of chrysotile (white asbestos) mixed into cement, typically containing around 10–15% asbestos.
The most recognisable form is large, wavy (corrugated) sheets with a dull, greyish appearance. These corrugated sheets were often fixed with visible bolts or hooks, and over time they may develop a weathered, slightly fibrous surface or become covered in moss and lichen. Less common but still found are flat asbestos cement sheets, which were sometimes used on more modern or flat‑roofed garages.
One important point: asbestos cement looks very similar to modern, non‑hazardous cement fibre sheets, which is why garage roof asbestos identification can be tricky. You can’t rely on sight alone to know for certain.
Visual Signs That Your Garage Roof Might Contain Asbestos
While only proper testing can confirm asbestos, there are several clues you can look for to assess whether your garage roof is likely to contain it. Think of these as “amber flags” – reasons to be cautious and investigate further.
- Colour and texture: Asbestos cement sheets are typically grey or off‑white, sometimes with a brownish tint on the underside. The surface often feels coarse rather than smooth, and older sheets frequently show patches of moss or lichen growth (asbestos cement is particularly attractive to moss).
- Corrugated pattern: If your garage roof has the classic wavy / corrugated design, that’s a strong indicator. Asbestos cement sheeting was the dominant material for corrugated garage roofs for decades. Look for large ridges running across the roof; these sheets were typically around 3–4mm thick.
- Batch codes and markings: Some asbestos roofing sheets have printed batch codes on the underside – though you’ll only spot these if you can safely look up from inside the garage.
- Absence of “NT” stamp: Many local councils note that if a grey corrugated sheet doesn’t have “NT” (non‑asbestos) stamped on it, it’s most likely asbestos cement.
If you’re seeing a combination of these features, it’s wise to treat the material as presumed asbestos until you have a definitive answer.
Age Indicators: When Was Your Garage Built?
Age is one of the strongest clues available. Asbestos was banned in the UK in 1999, but its use in construction materials started to decline earlier. However, stockpiles meant that asbestos cement products continued to be installed into the early 2000s. As a general rule: if your garage was built or last re‑roofed before the year 2000, you should presume that a corrugated cement roof contains asbestos.
The peak period for asbestos garage roofs was the 1960s, 1970s and 1980s, when asbestos cement production was at its height. If you live in a post‑war property or a 1970s housing estate in Kent, the chances are significantly higher. Even garages built in the 1990s may contain asbestos, as stock was still widely available.
If you’re unsure of your garage’s construction date, check your property deeds, ask neighbours with similar homes, or look for clues like original fixtures and fittings. A qualified asbestos surveyor can also help you piece together the history.
What Happens During Asbestos Testing?
Once you’ve spotted the signs, the only way to know for sure is to test. A BOHS-qualified surveyor visits your property and takes a tiny, rice-sized sample of your roofing material using specialist tools that prevent fibre release. The sample is immediately sealed, double-bagged, and sent to a UKAS-accredited laboratory for analysis.
Under the microscope, analysts identify both the presence and type of asbestos fibres. Results typically come back within a few working days, accompanied by a clear, jargon‑free report.
Crucially, you won’t be left guessing. Your surveyor will give you an actionable recommendation: leave it undisturbed, apply a protective sealant (encapsulation), or arrange professional removal. Testing is the only way to stop worrying and start knowing exactly where you stand.
What Are the Real Risks of an Asbestos Garage Roof?
This is the question that understandably causes the most anxiety, so let’s be clear and calm.
If your asbestos garage roof is in good condition that if there are no cracks, no crumbling edges, no water leaks, and it’s not being drilled, sawn or broken, the risk to your health is very low. Asbestos fibres are only dangerous if they become airborne and are inhaled. A solid, intact asbestos cement sheet that’s left alone poses minimal risk. The HSE’s clear guidance is that if asbestos is in good condition, it’s safer to leave it undisturbed.
The danger arises when the material deteriorates or is disturbed. Over time, asbestos cement can weather, crack, or develop soft, crumbly edges. Moss and lichen growth can also accelerate deterioration by holding moisture against the sheet. If the roof starts to leak, or if you (or a tradesperson) start drilling, cutting or breaking the sheets, fibres can be released.
Once inhaled, those tiny fibres can lodge in the lungs and, many years later, cause serious diseases such as mesothelioma, asbestos‑related lung cancer, or asbestosis. That’s why professional handling is non‑negotiable if any disturbance is planned.
When Is Removal Actually Needed?
Not every asbestos garage roof needs to be removed. Here’s when removal becomes the right choice:
- The roof is damaged or deteriorating. Cracks, holes, crumbling edges, or signs that water is getting through are clear red flags. If the material is no longer “well‑bonded,” fibres can start to release over time.
- You’re planning a renovation or demolition. If you intend to replace the garage roof, extend the garage, or demolish the structure entirely, the asbestos must be removed first by a licensed professional. This is a legal requirement under the Control of Asbestos Regulations 2012.
- The roof leaks. Water ingress not only damages anything stored in the garage but also accelerates the deterioration of the asbestos sheets themselves.
- You’re buying or selling. Many mortgage lenders and buyers will ask for clarity on asbestos before completing a sale. A professional survey can provide the documentation needed to proceed.
- You simply want peace of mind. Some homeowners prefer to remove an intact asbestos roof to eliminate any future worry, especially if they plan to stay in the property long‑term.
Why Professional Removal Matters
If you’ve determined that removal is the right path, using a fully licensed asbestos removal contractor is essential. This isn’t a job for your regular builder or a weekend DIY attempt.
Licensed contractors like All About Asbestos follow strict HSE‑approved procedures: they set up containment zones, use wet‑removal methods to suppress dust, double‑bag all waste, and dispose of it at certified specialist landfill sites recognised by the Environment Agency. They also monitor air quality throughout the process to ensure no fibres escape into the wider environment.
One of the biggest advantages of choosing a single‑provider service is that you don’t need to manage multiple contractors. With All About Asbestos, the same team can handle everything, from the initial survey through to removal, certified disposal, and even new roof installation if you want a replacement. That means one point of contact, one consistent standard of safety, and far less stress for you.
Your Next Steps: Getting the Clarity You Need
Every asbestos journey starts with the same simple step: finding out what you’re actually dealing with. You don’t need to guess, worry, or put off your renovation plans.
All About Asbestos brings over 30 years of specialist asbestos experience to homeowners across Kent and South East London. Their BOHS‑qualified surveyors, full licensing, and Environment Agency recognition mean you’re dealing with genuine experts who understand both the regulations and the very real concerns of anxious homeowners.
If you’re looking at your garage roof right now and wondering what to do next, pick up the phone. Call All About Asbestos on 01843 600765 for a free, no‑obligation consultation. There’s no pressure, no commitment – just clear, calm, expert advice to help you make the right decision for your home and your family.
Frequently Asked Questions
How can I tell if my garage roof contains asbestos just by looking at it?
You can’t. Visual clues like corrugated grey sheets or a build date before 2000 are strong indicators, but only laboratory testing can confirm asbestos.
Is it safe to leave an asbestos garage roof alone?
Yes, if it’s in good condition and not being disturbed. The risk is very low when left intact. Regular visual checks are usually all that’s needed.
What happens during professional asbestos testing?
A trained surveyor takes a tiny sample of the material and sends it to a UKAS-accredited lab. You receive a clear report with a recommendation within a few days.
Do I have to remove my asbestos garage roof?
Not always. Removal is only required if the roof is damaged, deteriorating, or if you’re planning renovation or demolition work.
Can I remove an asbestos garage roof myself?
In theory yes, but it’s strongly discouraged. It requires specialist equipment, protective clothing, and legal disposal. The risks to your health are significant.
