VTA Method
Claus Mattheck

 IML Sales Offices





IML North America

IML North America, LLC
15 Glidden Rd.
Moultonborough, NH 03254

E-Mail:   info(at)iml-na.com
Phone:   603-253-4600




IML Florida


P.A.1635 Eagle Harbor Parkway, Suite 4
Fleming Island, FL  32003

E-Mail:    info(at)imlusa.com
Phone:   603-253-4600

VTA - Visual Tree Assessment
Visual Tree Inspection


What is VTA?

The VTA method is an internationally recognized method of tree inspection wherein potentially hazardous symptoms are analyzed, defects are confirmed and measured and the probability of failure is assessed. VTA helps to distinguish potentially hazardous trees from those that are actually hazardous, thereby preventing removal of healthy trees. This way safe trees are protected.

VTA gives information about the body language and the mechanics of trees and instructs you in the correct use of our test and measuring instruments.

The partial stages of the VTA method:

1. Inspection for detect symptoms

  • Body language of trees
  • Growth defects
  • Appearance of the bark
  • Crown and leaves
  • Fungal fruiting bodies and their body language
  • Local environment of the tree

2. Confirmation of defects and measurement

3.  Assessment of the defect

  • Criteria of failure for hollow or decayed trees
  • Criteria of failure for root damages
  • Criteria of failure for trees that are healthy but high trees
    (H/D ratio!)

4.  Determination of further actions

  • Pruning
  • Mechanical aid (crow securing system, stilts,...)
  • Replacement of the tree

 Advantages of the VTA method: 

  • The VTA method, which focuses on the comprehension of the body language of trees, can be applied worldwide.
  • Sound measurement and drilling techniques only are supposed to confirm and dimension detected defects.
  • Certified Arborist would be able to distinguish between a potentially hazardous tree and a tree that only appears to be hazardous. Therefore, less trees will be felled and increase public safety.
  • Distinguishing between foreseeable and unforeseeable accidents, the VTA method makes its contribution to law and order. Founded liability claims can be settled and unfounded ones can be rejected.
  • Therefore, the VTA method is neither pro-tree nor anti-tree.
    In the event of damage, this method makes it possible to obtain a suitable decision. 

Examination for the graduation as certified tree inspector according to VTA
with Prof. Dr. Claus Mattheck and his friends Stupsi the hedgehog & Pauli the bear!

Since 2006, VTA method certified tree inspector examinations have been offered by Prof. Dr. Claus Mattheck. The goal is to learn to perform a high quality and scientifically up-to-date tree inspection. Requirements for admission is the documented participation in the following seminar.

  • Intensive introduction
  • Biomechanical evaluation of wood destroying fungi in trees
  • VTA Elite Seminar / Tree Engineering

For more information on the organizer:

Seminar Office Erika Koch
Fasanenhofstr. 94A
70565 Stuttgart

Phone: +49 (0) 7141 7157564
Fax: +49 (0) 711 7156410

 Send an email!
Website: www.vta-seminare.de

News & Info
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Trade Shows & Seminars:
IML as exhibitors

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