Asbestos Shed Roof Removal in Barnet
Many properties in Barnet have outbuildings constructed when corrugated asbestos cement was commonly used as an affordable roofing material. These rigid sheets were widely installed during the twentieth century and may remain in place decades after the building was erected.
The asbestos fibres in cement sheets are strongly bound into the material, making undamaged roofing lower risk than more friable asbestos products. Any removal should be properly planned so the panels are handled with minimal breakage and the resulting waste is controlled.
Shed-Roof.co.uk helps homeowners in Barnet find contractors for asbestos cement roof assessment, removal and replacement. Submit the short form and compare quotations from up to four suitable businesses covering your area.
What Homeowners Should Know About Asbestos Cement
Asbestos cement is a hard composite material made by combining cement with asbestos fibres. Older roofing may have a dull grey, stained or mottled surface.
The age and appearance of the sheets may suggest asbestos is possible, but they do not provide definitive identification. Laboratory analysis of a representative sample is the reliable way to establish whether asbestos is present.
How to Identify a Possible Asbestos Shed Roof in Barnet
A shed or garage roof installed before asbestos use ended may warrant further investigation before repair or removal.
Features commonly associated with older asbestos cement roofing include:
- Heavy cement-like roof panels.
- A roof structure without continuous timber boarding.
- Moulded ridge pieces made from a similar cement material.
- No record of a modern replacement roof.
- Cracks around corners or fixing points.
Do not break off a piece yourself to find out what the material contains.
When Can Asbestos Cement Be Left in Place?
The presence of asbestos alone does not automatically mean the roof must be removed straight away. The decision depends on the sheet condition, use of the building and whether future work is likely to disturb the material.
Replacement may be worth considering where:
- The roof has become fragile or unreliable.
- Water enters around fixings and sheet overlaps.
- Falling branches have damaged the roof.
- Rotten purlins or rafters cannot be reached without removing the sheets.
- The shed or garage is being refurbished.
- The structure is being removed completely.
- A modern covering would improve drainage and weather protection.
Signs of a Damaged Asbestos Shed Roof
Corrugated cement sheets can be fragile even when they appear solid from the ground.
Common asbestos roof problems include:
- Cracked or split corrugated sheets.
- Small fragments separating from the roof.
- Movement around the roof fasteners.
- Leaks at overlaps and fixing points.
- A rough or eroded cement finish.
- Persistent moisture held against the roofing.
- Sagging or movement in the roof structure.
- Sheets that have shifted or become unsecured.
- Debris falling from damaged roof edges.
What Not to Do with an Asbestos Shed Roof
Power tools and aggressive cleaning methods can damage the cement matrix and create unnecessary dust.
Avoid:
- Drilling new fixing holes through the sheets.
- Using power tools to resize asbestos roof panels.
- Dropping sheets from the roof.
- Using an angle grinder.
- Using high-pressure equipment to remove moss.
- Using compressed air or methods that may spread dust.
- Walking directly on the roof.
- Mixing asbestos fragments with general building waste.
- Allowing removal to start without an assessment and suitable work method.
Asbestos Shed Roof Removal Services in Barnet
Confirming Whether the Roof Contains Asbestos
A suitable surveyor or trained person can assess the roof and take a representative sample where necessary. The sample should be collected using methods that minimise damage and fibre release.
Preparing for Asbestos Roof Removal
A suitable method should explain how the panels will be released, lowered, packaged and transported.
Planning may include:
- Reviewing asbestos sampling results.
- Selecting workers with appropriate competence and training.
- Planning safe access to a fragile roof.
- Keeping residents, neighbours, children and pets away.
- Ensuring workers have facilities for safe decontamination.
- Planning how large sheets will be lowered without breaking.
- Confirming the waste carrier and receiving facility.
Careful Asbestos Roof Dismantling
Asbestos cement sheets should be removed whole wherever reasonably practicable.
- Keeping the material suitably damp to limit dust.
- Preserving the sheets intact where possible.
- Supporting large roof sheets during removal.
- Avoiding throwing or dropping roofing material.
- Avoiding dry sweeping and compressed air.
Packaging and Labelling Asbestos Waste
The containment method should suit the size and condition of the removed material.
- Protecting the packaging from punctures and tears.
- Using suitable asbestos waste bags for smaller debris.
- Preventing sheet edges from remaining exposed.
- Keeping asbestos separate from ordinary building materials.
- Loading packages carefully.
Registered Waste Carriers
The movement of hazardous asbestos waste requires the relevant documentation and duty-of-care controls.
A written quotation should explain:
- Which business is responsible for removing the material from the property.
- Who is named on the waste documentation.
- Where the material will be taken.
- How the hazardous waste movement will be recorded.
- Any additional asbestos waste charges.
Asbestos Roof Removal Without Re-Covering
Removal-only work may also be arranged where a separate roofing contractor will install the new covering.
Responsibility for leaving the remaining structure safe should be agreed before work starts.
Asbestos Roof Removal and Replacement
Completing removal and re-roofing as one project can reduce the period for which the building remains open to the weather.
Local contractors may provide:
- Controlled removal of the asbestos cement panels.
- Checking the frame for rot, damage or corrosion.
- Installing new battens, purlins or deck boards.
- Improving the roof pitch or fall.
- Fitting the agreed modern roof covering.
- Connecting the roof to a water butt where requested.
Replacement Materials for an Asbestos Shed Roof
Steel Roof Sheet Replacement
Steel panels are available in different profiles, finishes and colours. Condensation control or additional ventilation may be useful in enclosed buildings.
Lightweight Bitumen Roof Panels
The material is available in several colours and is commonly used on garden outbuildings. Correct overlaps and fixing positions are essential for weather resistance.
Non-Asbestos Cement Roofing
Modern fibre cement is often installed on garages, workshops and agricultural outbuildings. The structure must be able to support the chosen panels and fixing arrangement.
Rubber Membrane Replacement
A large membrane can create a waterproof surface with relatively few joints. This replacement normally requires plywood or OSB boarding over suitable structural supports.
Felt Replacement After Asbestos Removal
Several product grades and installation methods are available. The timber deck must be dry, stable and smooth.
Fibreglass Shed Roof Replacement
The system requires stable boards and suitable weather conditions during application. The contractor should assess whether the supporting frame is appropriate.
Translucent Replacement Roofing
Clear, tinted and opaque products are available. The sheets require compatible fixings, glazing bars and sealing washers.
Outbuilding Roof Repairs Before Re-Covering
A replacement covering should not be installed over unstable, rotten or badly corroded structural components.
- Replacing rotten timber purlins.
- Strengthening the main roof frame.
- Renewing decayed edge supports.
- Treating or replacing corroded metalwork.
- Fitting plywood or OSB for felt, EPDM or GRP.
- Adapting the frame for the new roof covering.
- Replacing fascias and verge boards.
Types of Asbestos Roofing Projects in Barnet
The appropriate contractor and removal method will depend on the building size and sheet condition.
- Timber garden sheds.
- Single and double garages.
- Larger timber workshops.
- Brick and block-built outbuildings.
- Animal shelters and rural stores.
- Open-sided storage areas.
- Commercial storage buildings.
- Detached utility structures.
- Multiple connected outbuilding units.
What Happens During Removal and Replacement?
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Providing roof and building details
Photographs taken safely from ground level may help contractors assess the likely scope.
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Confirming the material
The age and appearance of the roof are considered but not treated as proof.
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Selecting suitable controls
The contractor determines the work classification and prepares an appropriate risk assessment and plan.
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Restricting access
Packaging materials and ground protection are prepared.
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Removing the asbestos sheets
Sheets are supported and removed whole wherever reasonably practicable.
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Clearing the work area
Sheets and fragments are wrapped or bagged appropriately.
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Completing waste documentation
The material is delivered to a facility authorised to accept asbestos waste.
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Repairing the roof structure
New battens, purlins or roof boards are installed where required.
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Making the outbuilding watertight
Metal, bitumen, fibre cement, felt, EPDM or another agreed covering is installed.
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Completing the project
The homeowner is advised of any simple maintenance requirements.
Asbestos Re-Roofing Project Duration
The removal stage for a simple garage or shed can often be completed during one visit when access is good and the sheets remain intact.
Larger garages, connected roofs and complicated replacements may require several visits.
Weather conditions may affect both removal and installation of the new roof.
Asbestos Roof Replacement Prices in Greater London
A small intact roof with straightforward access normally costs less than a large damaged garage requiring structural repairs.
Factors that may affect the quotation include:
- The total amount of asbestos sheeting.
- The likelihood of additional controls being required.
- The building height and roof pitch.
- The proximity of neighbouring properties.
- Whether full panels can be removed without breaking.
- The work classification and controls required.
- The amount of protective sheeting and waste packaging.
- Carrier and hazardous waste documentation costs.
- The condition of roof timbers and purlins.
- Whether the new roof is metal, bitumen, fibre cement, felt or EPDM.
- The amount of perimeter finishing required.
- Temporary weather protection.
Ask contractors to explain what is included so that prices can be compared fairly.
Tell us about the roof and we will try to connect you with suitable specialists covering Barnet and nearby parts of Greater London.
What to Include in Your Asbestos Roof Enquiry
The more detail you provide, the easier it is for a business to decide whether it is suitably equipped for the work.
- The size of the shed, garage or outbuilding.
- The roof shape and pitch.
- When the roof may have been installed.
- Whether the roof is only suspected to contain asbestos.
- The condition of the sheets.
- Details of internal damp patches.
- Whether structural repairs may be required.
- The preferred replacement covering.
- Gate widths, parking and distance from the road.
- Any restricted working areas.
- Your preferred timescale.
A contractor may ask for pictures of the roof, building sides and access route.
Checks to Make Before Hiring a Contractor
Not every general roofer has the training or equipment needed for asbestos cement work.
- Confirm that the business is competent for asbestos cement removal.
- Confirm whether notification or a licensed contractor is required.
- Ask for proof of public liability insurance covering the proposed work.
- Ask for removal, packaging, transport and disposal to be itemised.
- Question any plan involving routine cutting, smashing or dropping.
- Ask how fragile-roof access will be controlled.
- Ask which registered business will transport the waste.
- Request relevant hazardous waste records after completion.
- Confirm which replacement materials are included.
- Ask what happens if rotten purlins or boards are discovered.
- Confirm arrangements if poor weather delays re-roofing.
- Ask for guarantees and final records in writing.
Nearby Areas Covered
The contractor network extends beyond Barnet into other parts of Greater London, including Acton, Bromley, Camden, Central London, Chiswick, Clapham, Ealing. Availability will depend on the roof condition, work classification and contractors active locally.
Frequently Asked Questions
How do I know if my shed roof contains asbestos in Barnet?
The roof age and appearance can indicate that asbestos is possible, but they cannot confirm it. Until the material has been confirmed, avoid drilling, cutting or otherwise disturbing it.
Is an asbestos shed roof dangerous?
Intact asbestos cement is generally considered lower risk than softer or more friable asbestos products. Damaged material should be assessed before repair or removal.
Does every asbestos cement roof need a licensed contractor?
The correct classification depends on the material condition, likely exposure and removal method. Some work may be notifiable non-licensed, while higher-risk asbestos work can be licensable.
Can an intact asbestos shed roof be left in place?
Sound sheets that are unlikely to be disturbed may sometimes be monitored and managed in place. Professional advice may be appropriate if the panels are leaking, damaged or due to be disturbed.
Can I remove an asbestos shed roof myself?
Some asbestos cement work may be non-licensed, but that does not make it an ordinary DIY project. Household asbestos disposal arrangements vary between local authorities.
Can asbestos roof sheets be cut or broken?
Dropping sheets from the roof is not an appropriate removal method. The contractor should plan how fixings will be released and full panels lowered safely.
Can an asbestos shed roof be pressure washed?
Pressure cleaning is not an appropriate routine method for suspected asbestos roofing. A badly weathered roof may be better assessed for replacement.
How is asbestos roof waste disposed of?
Removed asbestos cement is hazardous waste and must follow an appropriate disposal route. The contractor should explain the route and provide relevant records.
What can replace an asbestos shed roof in Barnet?
Some sheet materials can be fitted to existing purlins, while membrane roofs normally need continuous timber boarding. Condensation control may be important with metal roofing.
Can the old roof frame be reused?
The frame should be inspected after the asbestos sheets are removed. Any structural work should be clearly described in the quotation.
How long does asbestos shed roof removal take in Barnet?
A small straightforward roof may sometimes be removed within one working day. Structural timber repairs can extend the project.
Is asbestos shed roof removal covered by home insurance?
Routine wear, deterioration and improvement work may be excluded. Contact the insurer before arranging the work if you intend to make a claim.
How much does asbestos shed roof removal cost in Barnet?
Removal-only work normally costs less than a complete project including structural repairs and a replacement roof. Comparing detailed local quotations provides the clearest indication of cost.
How do I get asbestos shed roof removal quotes in Barnet?
Complete the online enquiry form with your postcode and details of the roof. Suitable businesses may contact you to request photographs, discuss the work or arrange an inspection. Submitting an enquiry does not commit you to accepting a quote.