How to take a sample from an asbestos cement roof

Asbestos garage roof corrugated Sheets.

Asbestos cement is usually very tough and contains 10 to 15% Chrysotile asbestos.

The fibres are bound in Portland cement. If you break a small piece off, most of the fibres will stay bound and not be released into the air.

You should wear a disposable FFP3 mask or a half-face reusable mask fitted with a P3 Filtre.

A fit check should be carried out to ensure an adequate seal is formed between the face and the seal.

Follow the manufacturers’ instructions supplied with the mask.

You should also wear a Type 5/6 Category 3 Coverall, gloves to protect your hands, google to protect your eyes and boots without laces.

More detailed information on RPE/PPE can be found by clicking the following link

HSE Website

It is better to seek a damaged portion of the asbestos garage roof where it will be easier to remove a small sample.

The sample should be obtained using blunt-nosed pliers or a screwdriver blade to remove a small section from an edge or corner.

If your pliers have serrated jaws, wrap a wet wipe over the material before you snap off a small area of the roof sheet.

The sample size should be at least 5 cm2.

You must take precautions to prevent falls through the fragile sheets and working at heights.

A block of raw Chrysotile Asbestos Fibres

Remove or Replace.

If you have an asbestos cement asbestos roof.

There are several ways you deal with it.

The three main options are as follows:

  1. REMOVAL and REPLACEMENT.
  2. OVERCLADDING.
  3. COATING/PAINTING.

We tend to recommend REMOVAL and REPLACEMENT of asbestos cement.

Why Remove and Replace.

You only do the job once, and the cement asbestos problem is gone.

It’s cheaper in the long run because you have done the job properly once and don’t need to worry about the cost of doing it again.

There is a massive range of roofing materials to choose from.

Long term safety: You don’t need to worry about the asbestos cement roof sheets any more.

The alternatives may cause more damage to the old asbestos cement roof sheets.

Speed: Asbestos removal contractors can complete within one day, so keeping the disruption to a minimum.