Water Absorption of Insulation in Protected Membrane Roofing Systems,

Abstract

Current methods for evaluation of the moisture absorption of plastic insulations (ASTM-C-272-53 and ASTM-C-355-64) due to vapor pressure gradients or immersion rely on short time periods to predict long term performance. This procedure may not provide accurate information on performance since in practice insulations may absorb more moisture than these tests indicate. A series of tests were conducted on extruded polystyrene roof insulation that had been in place, exposed to environmental moisture and pressure gradients, for a maximum of 36 months. Results indicate that moisture absorption of 1.5% by volume can be expected in the field. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1976
Accession Number
ADA032089

Entities

People

  • David Schaefer

Organizations

  • Cold Regions Research and Engineering Laboratory

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Civil Engineering
  • Cold Regions
  • Consortiums
  • Construction
  • Dielectric Polymers
  • Engineering
  • Engineers
  • Materials
  • Materials Laboratories
  • Materials Testing
  • Mechanical Engineering
  • Moisture Content
  • New Hampshire
  • Pressure Gradients
  • Test Methods
  • Thermal Conductivity
  • Vapor Pressure

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  • Approximation Theory.
  • Explosive Engineering.
  • Materials Science

Technology Areas

  • Microelectronics