Asebestos and harmful substance survey

Important information for the users/residents of the premises before the survey

  • Please make sure that the security lock on your door is open on the day of the survey.
  • The passage to any possible basement storages and storages for tools and personal property must be clear. It is already assessed in advance if there is a need to go into the storages separately, and a separate notice will be given on the issue. There is absolutely no need whatsoever for the resident to leave doors or spaces unlocked.
  • Please make sure that your pet cannot pose a danger to the investigator. Territorial pets may pose a danger to the investigator, when an outsider enters the property.
  • If you have a desired time of the day with regard to the advance notice, please notify the investigator electronically; these times will be observed as needed.
  • The survey does not require the residents to be present, but they can always do so if they wish; current information about the survey will be provided at the same time.
  • Please notify the investigator about any possible obstacles or pets regarding the visit to the flat. To ensure the safety of the investigator, if sounds of something that could be a large animal can be heard behind the door and it is not known if the pet has been safely put inside another room or not, we cannot enter the flat.


In an asbestos and harmful substance survey, the site is studied according to the areas specified in advance.

Before the survey, we study the history of the site and any previous surveys, and take account of the information they provide. Any previously completed survey reports will be checked and updated, if necessary.

The work order for the site is marked according to what is done, changed, repaired or demolished at the site.

Alternatively, the work may focus only on a single space or a larger whole, such as a comprehensive analysis of harmful substances.

An asbestos survey is usually drawn up in advance, when measures have been or are being planned for the property and/or space. Often, an asbestos survey is already carried out well in advance before drawing up the project plan is started at any greater extent.

The survey is based on documentary evidence and general information about the site.
A sample is taken of the materials that cannot be determined clearly, have not been identified, or are suspected to contain asbestos.

A material containing more than 1% by weight of asbestos is considered to be an asbestos-containing material.
Other harmful substances have their own limit values, which are usually marked as mg/kg. If a sample is found to exceed these limit values, each harmful substance has its own RT instruction card to be marked and instructions and statutes to be followed in carrying out the work. This always makes it possible to carry out demolition safely.
= Work that is done correctly is safe, which benefits everyone. In demolition work that involves asbestos and harmful substances, jumping ahead or cutting out steps is impossible; each work phase is a very important part of the whole.

The asbestos survey report is based on visual observation and interpretation based on information, as well as material samples.

The asbestos survey report is attached to the property’s documentation for any possible other measures, and it is stored with the property’s other documents for later review.

Purpose of the surveys

Using an asbestos survey and drawing up an analysis is an excellent tool in the following issues, for example:

  1. Water damage occurring on the property: a tool that speeds up the demolition of structures, drying and planning related to the damage. The structures that may contain harmful building materials are already known in advance. This saves valuable time and also reduces possible drying time, so that the structure can dry quickly after the demolition. The advance study provides information on how the materials must be demolished.
  2. For example, if a resident of the property intends to renovate a specific area, the possible harmful substances that the structure may contain are known in advance and the research results for estimating the costs and the price of the work already exist.
  3. Pre-planned measures are carried out on the property and project planning is started. This saves time and especially costs, and residents can be informed about future events in advance. The share of harmful substances in the structures has already been surveyed, which means that the project can start sooner.

Analysis methods

Targeted areas can include:

  • Structures to be demolished in the bathroom
  • Structures to be demolished in the kitchen
  • Measures related to pipe renovation
  • Measures related to renovating the roof
  • Demolition of structures related to water damage or other leaks

A comprehensive survey:

  • The survey of the property is focused on all separate areas.
  • If necessary, the property survey is extended to cover other hazardous materials, such as lead, heavy metals and PAH and PCB compounds.
  • In this survey, the site is surveyed so that the work usually also includes the facades and roofing materials.
  • If the property is to be torn down completely, the possibility of recovering the concrete for earth construction is also determined. (Government Decree concerning the recovery of certain wastes in earth construction)

Sampling methods:

  • Methods that do not risk the health of the investigator or others are used in sampling.
  • The sampling is focused on the materials assessed in connection with the advance study and the survey visit.
  • The methods used in sampling include taking a sample showing the layers, taking a sample piece and/or other methods that can be used to confirm the hazardous substance content of the material.
  • In sampling, devices for dust control and various sampling methods starting from local extractors all the way to negative pressure are used. The tools are always chosen to suit the site and the sampling work. Sometimes it may even be necessary to establish negative pressure in the area and carry out the sampling in a protected enclosure. This is usually done when taking samples in order to determine if the concrete is suitable for recovery, in which case a sample of approx. 4 kg of the structure is taken to be analysed. However, the coatings and their materials have been determined before this.
  • Harmful and dangerous building materials may be uncovered from under separate layers of mass, in which case the work is suspended and the instructions depending on the material are followed. Samples are taken and studied.

Each site has its own special regulations and own observations, and therefore the plans for the survey are always made on a site-specific basis for both the survey and the sampling.

Harmful substances to be analysed

  • Asbestos
  • Lead
  • PCB
  • Heavy metals
  • PAH
  • Suitability of concrete for recovery

Decrees, instructions and information from the authorities

In asbestos demolition, the following instructions on demolishing structures that contain asbestos must be followed: RT 82-0347/Asbestia sisältävien rakenteiden purku 10/2009 (in Finnish).

Prohibitions on asbestos and products containing asbestos are stipulated in the Government Decree on the Safety of Asbestos Work (VNa 798/2015) and the Act on Certain Requirements Concerning Asbestos Removal Work (684/2015).

The handling of waste containing asbestos is regulated by the Waste Act 646-666/2011.

Haitta-ainetutkimus RT 20-11160
Haitta-ainetutkimus tilaajan ohje RT 18-11244
Asbestikartoitus, tutkimusmenetelmä RT 18-11247
Asbesti rakentamisessa RT 18-11246
Asbestikartoitukseen perustuva purkutyösuunnittelu RT 18-11248
Haitta-ainetutkimus, rakennustuotteet ja rakenteet RT 18-11245
Asbestityökoneet Kone-Ratu 09-3038
Kivihiilipikeä sisältävien rakenteiden purku. RT 82-0381
PCB:tä ja lyijyä sisältävien saumausmassojen purku. RT 82-0382
Vaaralliset aineet – käsittely ja suojaus. RT 82–0384
Other substances classified as hazardous are regulated separately by the Government Decree on Waste 179/2012. Under the Waste Act 646/2011.
Rakentamisen jätehuolto RT 69-11183
Government Decree concerning the recovery of certain waste in earth construction VNA 591 ja 403
Environmental Protection Act 86/2000
Waste Act 646/2011
Instructions on dust-free renovation to be followed in demolition work RT 82-0384
If clear indications of microbial damage are found in connection with the opening and demolition of structures, the demolition is carried out as demolition of material with microbial damage. RT 82-0239

Use of asebestos in construction


SOURCE: RT 18-11246