ASTM C 1338

Standard Test Method for Determining Fungi Resistance of Insulation Materials and Facings

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Given below is general information pertaining to the ASTM C 1338 Test: 


The ASTM C1338 test method determines the ability of new insulation materials and their facings to support fungal growth.

  1. Fungal spore suspension is applied onto the insulation material and incubated in a warm humid controlled environment.
  2. The material is checked at the end of 28 days incubation for growth or resistance. Five different fungi are used for this test.
  3. An untreated control, comparative item or both are recommended in the method.
  4. The grading criteria of “pass/ fail” can be applied when an untreated control or comparative item is also tested in parallel.
  5. Otherwise data is reported as “growth/ no growth” giving an indication of support or resistance of the material respectively.
  6. Experiment is set up in triplicate sets.
  7. Sample thickness preferred is approximately 20mm.

Turnaround Time: 4-6 weeks

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