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).

February issue includes Appendix entitled Directory of United States Government periodicals and subscription publications; September issue includes List of depository libraries; June and December issues include semiannual index

A popular reference used daily by builders, contractors, architects, and owners, this guide is a unique collection of industry standards that define quality in construction. For contractors, subcontractors, owners, developers, architects, engineers, attorneys, and insurance personnel, it provides authoritative requirements and recommendations compiled from the nation's leading professional associations, industry publications, and building code organizations. New third edition is completely updated to the latest standards, codes, and trends. Coverage includes standards for concrete, masonry, framing, finish carpentry and cabinetry, insulation, roofing, windows and doors, drywall and ceramic tile, floor covering, plumbing, electrical, HVAC, and more. This one-stop reference is enhanced by helpful commentary from respected practitioners, including identification of items most frequently targeted for construction defect claims. FEATURES: This one-of-a-kind resource enables you to: Establish an acceptable quality of workmanship Resolve disputes and avoid litigation Train personnel in correct installation procedures Answer client questions and authority Easily find applicable building code information The nationwide team of editors includes leading contractors, engineers, architects and construction defect analysts. They provide practical installation tips, along with advice on how to avoid the most frequently cited defect claims.