insu­late naturally

Dis­cover forest cli­mate at home

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insu­late naturally

Dis­cover forest cli­mate at home

request a free brochure


The 70’s and 80’s

  • The stu­dent Bernd Unger, born in Thu­ringia in Ger­many, is well known for his thermal and elec­tro­me­cha­nical inven­tions. He con­cen­trated his inte­rest on the pro­duc­tion of elec­tri­city through tem­pe­ra­ture dif­fe­rences (Pel­tier-ele­ments) as well as energy-saving buil­ding technologies.
  • He regu­larly fasci­nated those around him with his new ideas and inven­tions and the young man was already win­ning rese­arch competitions.


  • The begin­nings of today’s estab­lished com­pany took shape in a modest two room flat in Chem­nitz, Germany.
  • Bernd Unger con­cen­trated on the ana­lysis of flaws in buil­ding construction.
  • As the first East German com­pany for natural pro­ducts he trained archi­tects, tradesmen and deve­lo­pers on the advan­tages of natural pro­ducts. Various test on com­bi­na­tions of buil­ding mate­rials led him to con­cen­trate on wood as a high-per­for­mance buil­ding material.
  • The idea for a wood-fibre board that could be directly-ren­dered was born.

1990 – 1995

  • The com­pany Unger, at that time called NATURHAUS SACHSEN, started a first series of tests on the wea­ther-resistant pro­per­ties of wood-fibre insu­la­tion boards.
  • The semi­nars and trai­ning courses offered by the deve­loper Dipl.-Ing. Bernd Unger aroused great inte­rest among the public.
  • After opti­mi­sa­tion, the first UNGER-DIFFUTHERM insu­la­tion boards were pro­duced for internal tests
  • The first buil­dings were insu­lated with wood-fibre boards and the first bro­chures were printed.
  • A breakth­rough in thermal insulation.
  • The self-deve­loped fine-ren­ders were integrated.
  • Rese­arch pro­jects for wood-fibre with a render coa­ting were under­taken in col­la­bo­ra­tion with insti­tutes such as the Tech­nical Uni­ver­sity Dresden, the Wil­helm-Klau­ditz-Institut in Braun­schweig and the Mate­rials Testing Insti­tute. These achieved very impres­sive results.
  • The first insu­la­tion ele­ment from UNGER-DIFFUTHERM that can be directly ren­dered is explained in trai­ning courses and pre­sented at buil­ding fairs. Under these watchful eyes, the company’s employees installed the first sys­tems in order to gain experience.

1999 – 2001

  • UNGER-DIFFUTHERM raised its pro­file within the timber-framed con­s­truc­tion sector.
  • The German eco­lo­gical con­sumer maga­zine Öko­test awarded the UNGER-DIFFUTHERM insu­la­tion system top marks (recom­mended).
  • Num­e­rous new buil­ding pro­jects follow due to a new level of con­sumer confidence.
  • The Euro­pean Prize for Inno­va­tion was awarded by the city of Chem­nitz and the State of Saxony.
  • The first Buil­ding Inspec­to­rate appr­oval for a render-bea­ring wood-fibre insu­la­tion system was awarded.


  • A year later the com­pany was issued a Buil­ding Inspec­to­rate appr­oval for mineral sub­strates under the number Z-33.43-204.
  • Num­e­rous addi­tional refe­rence buil­dings were insu­lated with the estab­lished insu­la­tion system.

2003 – 2005

  • New deve­lo­p­ments:
    A water vapour regu­la­ting base coat render for inte­rior use.
    New com­bined insu­la­tion boards were tested.
  • Due to incre­asing demand, invest­ments were made in fur­ther pro­duc­tion equip­ment for UNGER-DIFFUTHERM insu­la­tion boards.
  • The initial deve­lo­p­ment work of a 40 mm insu­la­tion board for use in the reno­va­tion of pre-fabri­cated houses.
  • Increased exports to Bel­gium, Aus­tria, France, Spain, Italy, UK and even Japan.

2006 – 2008

  • The regis­tered brand name Udi was intro­duced.
  • NEW: the fle­xible wood-fibre insu­la­tion board UdiFLEX® and the air and wind-tight system UdiSTEAM®
  • Long Term Gua­rantee System for the UdiFRONT® and UdiIN® Systems.
  • Initial suc­cesses were achieved in the UdiRECO® Project.
  • Market launch: UdiSPEED® (40 mm Render-bearer board) and upon suc­cessful com­ple­tion of the test series UdiCLIMATE® (inte­rior insu­la­tion system with cli­mate chambers).
  • Invest­ment in new manu­fac­tu­ring equip­ment for UdiSPEED® and UdiRECO®

2009 – 2013

  • New pre­sen­ta­tion of UdiRECO®  to the posi­tive acclaim of the spe­cia­list public.
  • The first buil­dings were reno­vated using UdiRECO®. The system can be used intern­ally and externally.
  • After 2 years of deve­lo­p­ment a spe­cial high­light was achieved: UdiSTONE®, the par­ti­tion wall system.

2014 – 2016

  • Based on the expe­ri­ence gained with UdiCLIMATE®, an inge­nious inven­tion was created:
  • With the new, slim, inte­rior insu­la­tion UdiIN 2CM®, sur­face tem­pe­ra­tures can be raised by up to 4 degrees Celsius.
  • To replace the initial, small-scale, manual pro­duc­tion system for UdiIN 2CM®, in 2016 a new machine for fully auto­mated gluing was con­s­tructed and installed. Ano­ther important investment.

2017 – 2018

  • The com­pany changed its name to Udi DÄMMSYSTEME GmbH. The founder Dipl. Ing. Bernd Unger retired from the manage­ment of the com­pany and now con­cen­trates full-time on the rese­arch and deve­lo­p­ment of new products.
  • The trade­mark UNGER-DIFFUTHERM has been retained and stands for qua­lity and long years of expe­ri­ence. Anka Unger took over the sole respon­si­bi­lity for manage­ment and Robby Fitzner is the com­pany officer with sta­tu­tory aut­ho­rity. Our aim is to remain close to our cus­to­mers and to con­tinue to pro­vide high qua­lity pro­ducts for tradesmen and developers.
  • The future: Fur­ther deve­lo­p­ments and rese­arch pro­jects are in pro­gress for radiant hea­ting in buil­dings in com­bi­na­tion with the unbeatable per­for­mance of UdiWood-Fibre Insu­la­tion.


  • In January 2019 ano­ther patent was regis­tered for UdiSUN®: „Hea­ting devices for the inte­rior of a building“.
  • The com­bi­na­tion of the inte­rior insu­la­tion board UdiIN 2CM®  and the sur­face-tem­pered carbon she­eting UdiSUN® gains serious importance in the pro­ject sector.
  • Udi DÄMMSYSTEME joins the Bun­des­ver­band Infrarot-Hei­zung e.V.