SIST-TS CEN/TS 15003:2005
(Main)Durability of wood and wood-based products - Criteria for hot air processes for curative uses against wood destroying organisms
Durability of wood and wood-based products - Criteria for hot air processes for curative uses against wood destroying organisms
This document specifies the minimum performance requirements for hot air treatment intended for application against specific classes of wood attacking organism. It specifies the minimum performance criteria to be achieved by hot air treatment.
NOTE Until now sufficient practical experience and results of scientific tests are available only for heat treatments using hot air as a medium to increase the temperature inside building components up to a threshold lethal to wood destroying organisms. Therefore, this document is restricted to hot air treatments although other measures like, for example, radio waves or electric blankets may be useful means for limited and special applications.
This document is applicable only to hot air treatment, in so far as it is intended to cure attack by wood destroying beetles and the dry rot fungus (Serpula lacrymans).
This Technical Specification is not applicable to eradicate an attack by termites or by fungi other than the dry rot fungus (Serpula lacrymans).
Hot air treatment as described in this document does not provide subsequent preventive protection against attack by wood-destroying organisms.
This document does not define the equipment, techniques or precise operation procedures required to achieve the parameters given in clause 5 for any set of practical circumstances. Specifications for particular practical circumstances have to be developed on a case by case basis by expert advisers/consultants.
Dauerhaftigkeit von Holz und Holzprodukten - Kriterien für Heißluftverfahren zur Bekämpfung von holzzerstörenden Organismen
Durabilité du bois et des matériaux dérivés du bois - Criteres s'appliquant aux procédés a air chaud a usages curatifs contre les organismes lignivores
Trajnost lesa in lesnih proizvodov – Merila za uporabo vročega zraka za zaščito proti organizmom, škodljivim lesu
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST-TS CEN/TS 15003:2005
01-julij-2005
7UDMQRVWOHVDLQOHVQLKSURL]YRGRY±0HULOD]DXSRUDERYURþHJD]UDND]D]DãþLWR
SURWLRUJDQL]PRPãNRGOMLYLPOHVX
Durability of wood and wood-based products - Criteria for hot air processes for curative
uses against wood destroying organisms
Dauerhaftigkeit von Holz und Holzprodukten - Kriterien für Heißluftverfahren zur
Bekämpfung von holzzerstörenden Organismen
Durabilité du bois et des matériaux dérivés du bois - Criteres s'appliquant aux procédés
a air chaud a usages curatifs contre les organismes lignivores
Ta slovenski standard je istoveten z: CEN/TS 15003:2005
ICS:
79.040 Les, hlodovina in žagan les Wood, sawlogs and sawn
timber
SIST-TS CEN/TS 15003:2005 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST-TS CEN/TS 15003:2005
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SIST-TS CEN/TS 15003:2005
TECHNICAL SPECIFICATION
CEN/TS 15003
SPÉCIFICATION TECHNIQUE
TECHNISCHE SPEZIFIKATION
March 2005
ICS 79.040
English version
Durability of wood and wood-based products - Criteria for hot air
processes for curative uses against wood destroying organisms
Durabilité du bois et des matériaux dérivés du bois - Dauerhaftigkeit von Holz und Holzprodukten - Kriterien für
Critères s'appliquant aux procédés à air chaud à usages Heißluftverfahren zur Bekämpfung von holzzerstörenden
curatifs contre les organismes lignivores Organismen
This Technical Specification (CEN/TS) was approved by CEN on 9 November 2004 for provisional application.
The period of validity of this CEN/TS is limited initially to three years. After two years the members of CEN will be requested to submit their
comments, particularly on the question whether the CEN/TS can be converted into a European Standard.
CEN members are required to announce the existence of this CEN/TS in the same way as for an EN and to make the CEN/TS available
promptly at national level in an appropriate form. It is permissible to keep conflicting national standards in force (in parallel to the CEN/TS)
until the final decision about the possible conversion of the CEN/TS into an EN is reached.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,
Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36 B-1050 Brussels
© 2005 CEN All rights of exploitation in any form and by any means reserved Ref. No. CEN/TS 15003:2005: E
worldwide for CEN national Members.
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Contents
Page
1 Scope .5
2 Terms and definitions .5
3 Wood destroying organisms .5
3.1 Beetles .5
3.2 Dry rot fungus .6
4 Performance requirements for curative hot air treatment.6
4.1 General.6
4.2 Health and safety considerations .6
4.3 Application against beetles .7
4.4 Application against the dry rot fungus (Serpula lacrymans) .7
5 Monitoring requirements .9
6 Process validation .10
6.1 General.10
6.2 Temperature control.10
6.3 Equipment .10
6.4 Locations for measuring.10
6.5 Time schedule for measuring.10
Annex A (informative) Example of a record for monitoring the hot air treatment to eradicate
wood attacking beetles .12
A.1 General information.12
A.2 Installation of the monitoring instruments: .12
A.3 Monitoring record .12
Annex B (informative) Example of a record for monitoring the hot air treatment to eradicate the
dry rot fungus (Serpula lacrymans).13
B.1 General information.13
B.2 Installation of the monitoring instruments .13
B.3 Monitoring record .13
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Foreword
This document (CEN/TS 15003:2005) has been prepared by Technical Committee CEN/TC 38 “Durability of
wood and derived materials”, the secretariat of which is held by AFNOR.
This Technical Specification gives the criteria for hot air treatment for curative uses against wood destroying
organisms. European Standard EN 14128 concerns the criteria for curative wood preservatives as determined
by biological tests.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to announce this Technical Specification: Austria, Belgium, Cyprus, Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland
and the United Kingdom.
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Introduction
This document should be used in conjunction with EN 14128 which describes the performance requirements
for curative wood preservatives as determined by biological tests.
The need for hot air treatment for curative use against wood destroying organisms depends upon a careful
diagnosis by expert, qualified specialists to determine the precise causes of the damage to be rectified. This
should include the type of wood attacking organisms involved and in the case of beetles whether they are
considered to be active, the environmental circumstances, the type of wood involved, the nature of the
building or construction, and the structural and physical significance of the timber which is damaged or at risk
of being damaged.
In particular the need for hot air treatment for curative use against the true dry rot fungus (Serpula lacrymans)
should include the precise identification of the dry rot fungus, the environmental circumstances, especially the
source and nature of any wetting, and the nature of the building or construction, including the masonry in
which the dry rot fungus is present.
NOTE So far, no reliable methods exist to determine whether the true dry rot fungus in a building construction is dead
or still alive, including dormant stage.
Hot air treatment for curative use should be used in an integrated way as part of a carefully prescribed
strategy involving a series of actions appropriate to the particular circumstances of each case. Associated
physical measures involving appropriate building works to remedy ingress of moisture and to dry out any
dampness can be an essential prerequisite for the use of any process for curative use. Expert diagnosis
should take into account all regional, practical, environmental, economical, safety and any other factors which
may be relevant to the prescriptive decisions to be taken.
If properly done hot air treatment does not influence the mechanical properties of the timber involved.
However the temperature usually applied can influence materials other than wood,
It is not the purpose of this document to provide a specification, or even guidance in developing specifications
for remedial work to eradicate wood destroying organisms. It is intended to guide specifiers, users and others
in selecting and specifying hot air treatment on the basis of its effectiveness as demonstrated in accordance
with the criteria given.
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1 Scope
This document specifies the minimum performance requirements for hot air treatment intended for application
against specific classes of wood attacking organism. It specifies the minimum performance criteria to be
achieved by hot air treatment.
NOTE Until now sufficient practical experience and results of scientific tests are available only for heat treatments using
hot air as a medium to increase the temperature inside building components up to a threshold lethal to wood destroying
organisms. Therefore, this document is restricted to hot air treatments although other measures like, for example, radio
waves or electric blankets may be useful means for limited and special applications.
This document is applicable only to hot air treatment, in so far as it is intended to cure attack by wood
destroying beetles and the dry rot fungus (Serpula lacrymans).
This Technical Specification is not applicable to eradicate an attack by termites or by fungi other than the dry
rot fungus (Serpula lacrymans).
Hot air treatment as described in this document does not provide subsequent preventive protection against
attack by wood-destroying organisms.
This document does not define the equipment, techniques or precise operation procedures required to
achieve the parameters given in clause 5 for any set of practical circumstances. Specifications for particular
practical circumstances have to be developed on a case by case basis by expert advisers/consultants.
2 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
2.1
eradication
treatment of infested timber and/or masonry in order to kill the wood destroying insects and the dry rot fungus.
NOTE An eradication not necessarily includes an preventive effect against a subsequent attack. This especially
concerns hot air treatment as specified in this Technical Specification and which does not include any preventive effect.
2.2
lethal dose
total amount of heat as a combination of a particular temperature for a particular period of time necessary to
kill all stages of the wood destroying organisms in question
2.3
structural timber
Definition relevant from CEN/TC 124 in preparation.
3 Wood destroying organisms
3.1 Beetles
The wood attacking beetles to which hot air treatment can be applied are:
Hylotrupes bajulus (houselonghorn beetle) in the sapwood of softwoods;
Anobium punctatum (common furniture beetle) in softwoods and hardwoods;
Xestobium rufovillosum (deathwatch beetle) in hardwoods and softwoods, mainly in oak wood;
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Lyctus brunneus (powderpost beetle) in the starch containing sapwood of hardwoods;
Hesperophanes cinnereus in the sapwood of hardwoods (occurs only in Mediterranean countries).
3.2 Dry rot fungus
The dry rot fungus (Serpula lacrymans = true dry rot fungus) occurs in buildings, causing brown rot in timber.
The fungus can develop at relatively low wood moisture contents and is able to penetrate damp masonry over
long distances in order to infect further timber or to develop its fruit-bodies. Typical is its capability to survive in
a so-called dormant stage where it is not active but still alive.
Serpula lacrymans is very sensitive to changes in environmental conditions and can be eradicated effectively
by hot air treatment.
4 Performance requirements for curative hot air treatment
4.1 General
Experience indicates that the application of heat to a particular temperature for a particular period of time
under particular environment conditions, can successfully kill wood attacking organisms. This includes the
various stages of beetles inside wood, that is eggs, larvae, pupae and imagos, and the hyphae of the dry rot
fungus (Serpula lacrymans) inside wood or masonry.
NOTE In principle any form of increased temperature can be used, providing it meets the minimum requirements
given in 5.3 and 5.4. However, in practice, due to technical reasons, it is not currently possible to apply high temperature
sources, such as micro waves, to large components and especially not to masonry, to reach a sufficient dose of heat
(temperature x time) within reasonable time by these techniques. Therefore, generally only hot air will be suitable to
provide the temperatures required in the infested material.
Structural timber will generally require treatment in situ. This will generally include masonry in the case of
eradication of an attack by the dry rot fungus. Suitable precautions are necessary to keep the heat close to the
infested timber or masonry respectively. If necessary the components shall be covered by suitable materials,
such as tents or similar equipment. In the case of the dry rot fungus provisions shall be made as to transfer
the heat to the attacked building constructions as a whole which means from all sides, to confirm that the
required temperature will be met and kept evenly in the entire construction. For small components or objects
of non-structural timber it can be more appropriate to transport them to special treating chambers, containers
etc.
4.2 Health and safety considerations
Hot air treatment carries with it significant risks of damage for example to animals and human beings, of heat
sensitive materials or indeed ignition of vulnerable materials and structures. There is normally no risk of
ignition of materials by the heat itself. Local fire authorities shall be consulted before setting up heat units.
NOTE It may be necessary to notify the insurers of the building to be treated and agree procedures with them as well
as with the Fire Brigade.
The risk of damage depends upon the nature of the building, structure or commodity to be treated, the method
of applying the hot air, the duration of the heating period and the specific material or materials associated with,
or the target of the treatment.
To avoid damaging buildings and other building elements, a measuring and data collection system shall be
employed which responds to the temperature and relative humidity control devices.
Contractors, specifiers, users and clients shall take all necessary measures to obtain the appropriate
assurances that precautions to protect against risks have been taken and are appropriate to protect their
respective interests. All relevant specific national regulations shall be followed.
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Before applying curative hot air treatment in the surroundings of infested timber, it is necessary to check
whether there are any animals including bird’s eggs in the surroundings, which either shall be removed or the
treatment shall be postponed until the animals have gone before proceeding. This refers especially to
protected animals (e.g. bats).
Where heat source combustion gases are used directly to heat the structure, care shall be taken to ensure
that toxic gases or oxygen depletion are not a problem.
When operators enter a heated building the effects of the hot air on them shall be considered. Personnel can
need insulated protection when entering the heated zones. Operators entering a heated zone shall be
monitored by others who shall be able to evacuate an incapacitated individual if necessary.
4.3 Application against beetles
The minimum temperature requirement for eradication of beetle infestation is 55 °C for not less than 60 min in
the centre of each timber component. After completion of hot air treatment no ventilation shall be provided but
only normal cooling down according to the natural surrounding conditions.
Hot air treatment provides no residual preventive effect. If a preventive effect is req
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