Attic Ventilation Guidelines to Minimize Icings at Eaves

In cold regions, icicles and ice dams may develop on roofs that slope to cold eaves. Ventilating the space below the snow-covered roof with outdoor aur to create a "cold" ventilated roof is often an effective way to avoid such problems. Several buildings in northern New York were instrumen...

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Bibliographic Details
Main Authors: Tobiasson, Wayne, Buska, James, Greatorex, Alan
Other Authors: COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER NH
Format: Text
Language:English
Published: 1998
Subjects:
Snow
Ice and Permafrost
Air Condition
Heating
Lighting & Ventilating
*VENTILATION
*COLD REGIONS
*ICE FORMATION
LOW TEMPERATURE
NEW YORK
SNOW COVER
ICE
NORTH(DIRECTION)
ROOFS
ATTIC VENTILATION
019
Ice
permafrost
Online Access:http://www.dtic.mil/docs/citations/ADA431018
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA431018
Description
Summary:In cold regions, icicles and ice dams may develop on roofs that slope to cold eaves. Ventilating the space below the snow-covered roof with outdoor aur to create a "cold" ventilated roof is often an effective way to avoid such problems. Several buildings in northern New York were instrumented to determine how the attic temperature influenced icing. We observed that problematic icings developed very slowly, if at all, when the outside temperature was above 22F. Such icings can be avoided by sizing natural, and if necessary, mechanical attic ventilation systems to maintain an attic temperature of 30F when the outside temperature is 22F. The original document contains color images. Pub. in Interface, p17-24, Jan 1998.

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