HEISSLUFT.BIO

 

Ein Privathaus: Ein Teil des Dachstuhls eines Privathauses war von Holzameisen befallen. Zusätzlich hatte sich auch der Hausbock dort und in der angrenzenden Scheune weit ausgebreitet und eingenistet. Das Nagen der Larven konnte man deutlich hören. Der private Auftraggeber beauftragte eine Heißluft-Behandlung an Binker Materialschutz GmbH.

 

 

INFOBOX:
House Longhorn Beetle: The House longhorn beetle (Hylotrupes bajulus L.) is a major cause of damage to roof timbers in buildings throughout Germany and Europe. The larvae hatching from laid eggs attack the sapwood of seasoned softwood timbers. The lavae can completely destroy the sapwood causing severe danger to the roof stability. Heartwood or wood of older houses is immune from attack. The timber of newer buildings often contains a large proportion of protein rich sapwood. This provides the potential for a quick development of the pests. House longhorn pest is a large black beetle (10-25mm) with six legs and long antennae. The female is bigger than the male.

 

The cream-coloured larvae bore only in sapwood, creating tunnels and galeries of increasing size. Development is taking 3 to 7 years to complete before the beetles emerge from infested timber via the oval flight holes. The flying adults are mating in warm months and spread out to find new areas to infest.
See also: www.binker.eu
 

 

 

Fotos: links: Befall durch Holzameisen im Dachraum, rechts: Frischer Hausbockbefall an einem Kehlbalken: es sind nur die anfänglich vorhandenen ersten Fluglöcher zu sehen

 

Durch die Heißluft-Technik wurde ohne Einsatz chemischer Insektizide eine sofortige Abtötung in allen auf mindestens 55 °C aufgeheizten Holzbauteilen des Dachstuhls erzielt.

 

Fotos: links oben und oben rechts: Beheizung des Dachraums des Wohnhauses, unten: Einführung der Heizrohre in die Scheune

 

Dem Heißluft-Verfahren wurde aus öko-toxikologischer Sicht der Vorrang gegeben. Der Erfolg der Warmluft-Maßnahme konnte durch eine fachlich kompetente Vorbesichtigung, eine gewissenhafte Vorplanung, durch eine fachgerechten Ausführung und der damit verbundenen Qualitätssicherung sichergestellt werden.

 

 

INFOBOX
Heat Treatment: Heat treatment for pest eradication is a chemical free alternative to fumigation and spraying with liquid insecticides. Target pests are wood borers and also other insect pests like the Golden Spider Beetle or Pigeon Ticks. The key lies in the susceptibility of pests for high temperatures. All wood borers at any of the various stages of their life cycle will die if they are exposed to high temperatures between 45-55 ° C for an extended period (=exposure time).

Eradication of the entire insect pest infestation (eggs, larvae, pupae, and adults) takes place through thermal denaturing of the proteins and enzyms in the insects’ cells. In order to eradicate the complete pest population it is also essential for the heat to penetrate to the core of the infested timbers. Heating equipment contains ductwork and large portable oil fired heaters. Sensitive core temperature sensors are placed in the thermally least favourable positions to be monitored and to make sure complete pest eradication. The core temperature sensors are inserted in drilled holes. They are connected to a radio monitoring and data collection system. Based upon the heating equipment, volume of the space to be heated, the airtightness of the building, prevailing weather and the fabric of the building it takes about 8-14 hours to heat up the timber to the target temperature. Once the insect kill benchmark of 55°C has been achieved as all installed core temperature sensors having reached this target temperature an additional holding phase of one hour commences. Large roof areas can be devided into heating compartments.
www.binker.eu

 

 

 

Binker Materialschutz GmbH

Westendstraße 3
D-91207 Lauf a .d. Pegnitz

Tel: 0049 9123 99820

Fax: 0049 9123 998222

info@binker.de

Geschäftsführer:
Dr. Gerhard Binker
Joachim Binker

Bürozeiten:
Mo-Do:
08:00-12:00
13:00-17:00
Fr:
08:00-14:00