Working with Asbestos cement
This advice applies to businesses and private householders
What is asbestos cement?
Asbestos cement is a mixture of cement and asbestos (usually about 10-15% of the total product) forming a hard material often used as corrugated roofing on sheds, garages and farms. It was also used to make drainpipes, flues, water tanks and other products.
Asbestos cement usually contained white asbestos (chrysotile) but older types may contain blue (crocidolite) or brown (amosite). The type used is not really important as all asbestos is hazardous, although asbestos cement does not release many fibres and is relatively low risk.
Please take the hazard seriously and remember that the irreversible effects of asbestos exposure can take between 15 and 60 years to develop.
Asbestos use declined steadily from the 1970's but white asbestos (chrysotile) could still be used until November 1999, and can be found in some relatively new buildings.
Do asbestos cement products have to be removed?
No, asbestos cement products are very durable and are likely to last for many years. However, if they need to be removed this can be done without a licence or specialist firm, although care must be taken to minimise any fibre release.
Business owners have a legal duty to manage any asbestos in their premises and this would include monitoring the condition of asbestos cement. A cement product may need to be removed if it is in very poor condition and breaking up or needs uneconomical repair.
Householders do not have the same duties, although they are required to follow the procedures for safe disposal.
See guidance on leaving asbestos cement pipe excavations on GOV.UK.
I have an asbestos cement roof that is covered in moss, grass and lichen. Will this cause a problem?
This often happens to asbestos cement, and can eventually cause it to become brittle and break up. It is a good idea to keep the roof clear but care must be taken to do it in a way that doesn't damage the surface and release fibres.
The only way that is recommended is to apply a commercially available biocide, then when it has had time to act, apply water with a hose (not a jet wash!) and gently brush the moss off. You should never attempt to brush the moss off dry or use a wire brush.
If any lichen or moss roots prove difficult to remove, it is better to leave them to avoid damaging the roof.
How should asbestos cement be removed? Can I do this work myself?
For most small scale removals, you can usually remove it yourself (a licence is not needed) but you will need to take some precautions.
If removal of asbestos cement is done according to these rules, it will not usually fall into the category where it must be notified to the enforcing authority (HSE or Local Authority, depending on the premises) this would only happen if there was likely to be exposure beyond the "action level" given in the Regulations.
Please remember that this advice only applies to asbestos cement. Other asbestos materials are more dangerous and you should not attempt to remove them without specialist advice.
To minimise any risk of releasing fibres:
- Avoid breaking the sheets try to remove them whole.
- Dampen the sheets before working, in case any pieces break off while you are working. You may need to do this more than once. The best precaution is to carry out the task on a drizzly day! (Do not use excessive amounts of water as this makes cleaning up more difficult.)
- Don't use power tools or hand saws they will cause fibres to be released.
- Don't drop the sheets down to the ground they are likely to break. Hand them down to someone who is helping you.
Other safety precautions include:
- Wear a disposable dust mask (must be to P3 standard or it won't be effective against asbestos.) These are very cheap, at around £1.50 to £7.99 for a disposable mask.
- Wear disposable overalls with a hood (class 5) costing from £3.00 a pair and wellingtons or some other footwear that can be washed down. There are many suppliers - try the yellow pages or an internet search.
- Asbestos cement is a fragile material and is not weight bearing never go onto it without crawling boards. This should not be necessary when removing sheets.
- If you are working from a ladder, ensure it is in good condition and that you have someone to help by steadying the foot of the ladder. If the location is very high, awkward, or the job is likely to take a long time it may be safer to hire a portable tower scaffold for the duration of the work.
So how do I actually go about removing the asbestos cement?
Follow these steps:
- Prepare your work area remove anything that doesn't need to be there, and cover the ground or other surfaces with polythene that can be disposed of later. Ensure you have enough heavy duty bags or polythene for wrapping the sheets / pieces later on.
- Make sure you have a safe means of reaching the material to be removed and start to remove / dismantle the asbestos cement methodically. You may need to unscrew fastenings so have any necessary hand tools available.
- Hand down the pieces you remove and place them carefully on the polythene sheet where they will not get damaged.
- When you are finished, check for any debris. Clear up by hand, using wet wipes or similar disposable cloths and ensure any small bits or dust are placed on the polythene sheet. Never be tempted to use a vacuum cleaner!
- Wrap the sheets / pieces in polythene or place inside a bag if small enough (do not break them up) and seal up with tape. Now do the same again so that they are double-bagged.
- You will also need to dispose of the polythene used to cover the ground, your overalls and mask and any other waste from the job as asbestos waste. (Wipe down your footwear and put the cloth in with the waste) Carry out the same double bagging procedure for these - they can all go in together.
- When you have finished, and everything is safely double bagged, wash your hands and face and any tools used. It is ok for a few asbestos fibres to go down the sink as it is naturally found in water we drink it everyday and it does us no harm as it is not being breathed in!
So having wrapped everything up, how do I get rid of it?
Householders - in this area you can take small amounts (4-5 sheets) to the Flusco Household Waste Recycling Centre telephone 01768 480691. You must speak to a member of staff at the site who will tell you which skip to use. You must phone before going, to ensure it can be accepted on the day you wish to go there. If you use your own vehicle please check that you do not damage the wrapping and contaminate your car. For other sites in Cumbria that can accept asbestos waste see asbestos disposal on Cumbria County Council's website
Asbestos waste should not be transported in a trailer where it could fall out. A car or van is much safer.
If the amount to be disposed of is very large, the site may refuse to take it and you will have to follow the advice for business owners.
Businesses - contact a licensed asbestos removal in Cumbria on Yell.com and arrange for them to take the waste to a site licensed for the disposal of hazardous waste. It is necessary to comply with the Special Waste Regulations 1996 so using a contractor is likely to be easier than making the arrangements yourself. There will be a charge, so it is worth getting several quotes.