Asbestos roof Kenya guide: learn how to identify suspected asbestos cement sheets, where they occur, and why you should never disturb them.
An older corrugated or flat cement roofing sheet may contain asbestos, but you cannot safely confirm asbestos by appearance alone. Suspected asbestos roofing should not be cut, drilled, broken, sanded, or removed without appropriate professional assessment.
Asbestos cement roofing was used widely in many countries because asbestos fibres could be combined with cement to produce sheets that were strong, durable and resistant to heat. Older buildings in Kenya may therefore still have roofing materials that require careful handling.
The important point is that you cannot reliably identify asbestos sheets simply by looking at their colour, shape or age. Visual inspection can indicate that a material is suspicious, but laboratory analysis or appropriate professional assessment may be required for confirmation.
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If you are renovating an older house, factory, warehouse, school, farm building, commercial property or institutional facility, avoid disturbing roofing materials that you suspect may contain asbestos.
What Does Asbestos Roofing Look Like?
Suspected asbestos cement roofing is often grey, weathered and corrugated, but these characteristics are not enough to confirm that a roof contains asbestos.
Older asbestos cement sheets can appear:
- Grey or dull in colour
- Corrugated
- Flat or profiled
- Weathered
- Stained with age
- Moss-covered
- Brittle or damaged
However, many modern fibre-cement roofing products can look similar.
This means appearance should only be used to identify a suspected asbestos-containing material, not to make a definite diagnosis.
Where Might You Find Asbestos Roofing in Kenya?
Suspected asbestos cement roofing is more likely to be encountered during renovation or demolition of older buildings, particularly structures constructed when asbestos-containing products were still in use.
Potential locations include:
- Older residential buildings
- Warehouses
- Workshops
- Factories
- Agricultural structures
- Schools
- Institutional buildings
- Industrial facilities
The age of the building alone does not prove that asbestos is present.
If an old roof is being replaced, the material should be assessed before work begins.
Why Is Asbestos Difficult to Identify?
Asbestos fibres are microscopic, so you cannot confirm their presence simply by inspecting a roofing sheet with the naked eye.
A sheet may look like asbestos cement but actually contain another fibre-reinforcement material.
Conversely, a material that does not immediately appear unusual could still contain asbestos.
This is why homeowners should avoid relying on:
- Colour
- Texture
- Profile
- Age alone
- Internet photographs
- DIY identification methods
When confirmation matters, use an appropriate professional assessment and, where required, laboratory testing.
Why You Should Not Break a Suspected Asbestos Sheet
The main concern is not simply that asbestos exists in an old roofing sheet; the greater risk occurs when asbestos-containing material is damaged or disturbed and fibres become airborne.
Activities such as:
- Breaking
- Drilling
- Cutting
- Grinding
- Sanding
- Scraping
- Pressure washing
can damage the material and potentially release fibres.
Do not test a suspected sheet by breaking a piece off.
That can create precisely the exposure that should be avoided.
Intact Asbestos Cement Requires Careful Handling
Undamaged asbestos cement can present a different risk from heavily damaged or deteriorating material, but it should still be managed carefully and not disturbed unnecessarily.
If an older roof appears intact:
- Do not drill into it
- Do not cut it
- Do not sand it
- Do not pressure-wash it
- Do not remove it yourself
Instead, seek appropriate professional advice before renovation or replacement.
The safest approach is generally to avoid unnecessary disturbance.
Damaged Roofing Requires Extra Caution
Cracked, broken, severely weathered or deteriorating suspected asbestos roofing should be treated cautiously because damage can increase the possibility of fibre release.
Warning signs can include:
- Cracked sheets
- Broken edges
- Holes
- Severe surface deterioration
- Missing sections
- Damaged fixings
- Structural movement
Keep people away from damaged areas and avoid attempting to sweep, break or collect fragments yourself.
Do Not Use a Grinder on Suspected Asbestos Sheets
Grinding asbestos-containing roofing is particularly inappropriate because mechanical abrasion can generate dust and potentially release respirable fibres.
Similarly, avoid using:
- Angle grinders
- Circular saws
- Power drills
- Abrasive cutting tools
on suspected asbestos-containing materials.
If roof replacement is required, the work should be planned and carried out using appropriate asbestos-management procedures.
What If You Need to Replace an Old Roof?
If an older roof may contain asbestos, identify and assess the material before starting ordinary roofing work.
Do not begin by removing the sheets and asking questions later.
A safer project sequence is:
- Identify the existing roofing material as potentially hazardous.
- Prevent unnecessary access or disturbance.
- Obtain appropriate professional assessment.
- Determine whether asbestos is present.
- Plan removal or management according to applicable requirements.
- Use appropriately trained personnel where removal is necessary.
- Install the replacement roofing system after the old material has been safely managed.
This approach helps prevent accidental exposure during renovation.
Can You Test Asbestos Roofing Yourself?
DIY visual inspection cannot reliably confirm asbestos, and taking a sample yourself can create unnecessary exposure.
If testing is necessary, sampling should be approached professionally.
A qualified assessor can determine:
- Whether sampling is appropriate
- Where sampling should occur
- How the material should be handled
- What laboratory analysis is required
- What controls are necessary
Do not send broken pieces of suspected asbestos roofing through ordinary channels without obtaining proper advice.
What Should You Do If You Find Broken Sheets?
Do not handle or sweep up fragments of suspected asbestos roofing yourself; restrict access and seek appropriate professional advice.
If fragments are present:
- Keep children and other occupants away
- Avoid disturbing the debris
- Do not sweep it
- Do not vacuum it with an ordinary household vacuum
- Do not break larger pieces into smaller pieces
- Seek appropriate professional assistance
The objective is to prevent unnecessary fibre disturbance.
Asbestos Roofing and Renovation Projects
Renovation projects can create unexpected asbestos risks because roofing sheets may be disturbed during replacement, solar installation, ceiling work, plumbing or structural modifications.
Before starting work on an older building, consider whether roofing materials could contain asbestos.
This is particularly important if contractors need to:
- Install solar panels
- Replace roof sheets
- Install antennas
- Add ventilation
- Repair gutters
- Modify roof structures
- Install new electrical equipment
Contractors should know what material they are working with before disturbing the roof.
What About Painting an Old Asbestos Roof?
Painting or coating a suspected asbestos roof should not be treated as a simple DIY maintenance job because preparation activities can disturb the material.
Activities such as scraping, sanding or aggressive cleaning can create unnecessary disturbance.
If encapsulation or coating is being considered, obtain appropriate professional advice first.
The method should avoid creating airborne dust or damaging the existing material.
Do Not Confuse Asbestos Cement With Modern Fibre Cement
Modern fibre-cement roofing can resemble older asbestos cement, which is another reason appearance alone cannot establish whether a roof contains asbestos.
Today's fibre-cement products may use different reinforcement materials and manufacturing processes.
When replacing an old roof, ask for documentation where available.
Useful information may include:
- Product name
- Manufacturer
- Installation date
- Previous invoices
- Building records
- Product documentation
These records may help establish what material was originally installed.
Why Professional Assessment Matters
Professional assessment is important because identifying asbestos correctly requires more than recognising a particular roofing profile or colour.
A competent professional can help determine:
- Whether asbestos is suspected
- Whether sampling is necessary
- How the material should be managed
- Whether removal is required
- What controls should be implemented
This is especially important for schools, workplaces, rental properties and commercial buildings where many people could be exposed if the material is improperly disturbed.
Replacing Suspected Asbestos Roofing
Replacing suspected asbestos roofing should be planned as a controlled project rather than treated as ordinary mabati replacement.
Once the existing material has been appropriately assessed, the replacement plan can consider modern roofing options such as:
- Box profile sheets
- Corrugated roofing
- IT5 sheets
- Long-span roofing
- Stone-coated roofing
The new roof should be selected according to:
- Building design
- Roof pitch
- Structural requirements
- Climate
- Budget
- Intended use
The replacement roofing system should also include appropriate accessories and flashing.
Choosing Replacement Roofing Sheets
After an old roof has been safely managed, the replacement material should be selected based on the building's requirements rather than simply choosing the cheapest available sheet.
Consider:
- Steel thickness
- Coating
- Profile
- Sheet length
- Roof pitch
- Wind exposure
- Corrosion conditions
- Warranty
- Installation method
For coastal properties, corrosion resistance may be particularly important. For large warehouses, long-span sheets may reduce the number of joints. For residential buildings, appearance and thermal comfort may receive greater emphasis.
Why Choose Ali Glaziers Roofing Solutions?
Ali Glaziers Roofing Solutions supplies modern roofing materials and accessories for residential, commercial, industrial, agricultural and institutional projects across Kenya.
If you are replacing an old roof, our team can help you plan the new roofing system once the existing material has been appropriately assessed and managed.
Our roofing solutions include:
- Corrugated roofing sheets
- Box profile roofing
- IT5 roofing sheets
- Long-span roofing
- Stone-coated roofing
- Roofing accessories
- Structural steel
Browse our available products through the Roofing Shop.
Learn more about our company and roofing services through Roofing About Us.
For a quotation on replacement roofing materials, use our Request a Quote page.
Final Thoughts
If you are trying to identify an asbestos roof in Kenya, treat an older cement-based roofing sheet as potentially asbestos-containing until it has been appropriately assessed; do not rely on appearance alone and never disturb it just to find out.
The safest approach is to:
- Avoid disturbing suspected material
- Keep people away from damaged areas
- Do not cut, drill or grind the sheets
- Obtain appropriate professional assessment
- Follow applicable asbestos-management requirements
- Plan replacement carefully where necessary
Once the existing roof has been safely addressed, a modern roofing system can be selected according to the building's location, structure, use and budget.
Contact Us Today
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Funzi Road Branch, End of Funzi Road, Industrial Area
Ali Glaziers LTD Building
Nairobi, Kenya
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+254 (0) 716 259 682
+254 (0) 722 522 452
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If you are replacing an older roof and need modern roofing materials after the existing roof has been properly assessed, contact Ali Glaziers Roofing Solutions for product guidance and a project quotation.
