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Abstract
This paper reviews problems concerned with moisture in construction and suggests practices for countering them. The choice of roofing insulation material is discussed. The increased level of insulation brought about by the energy crisis may cause increased condensation problems between a roof deck and suspended ceiling unless the balance of insulation above and below the vapor barrier is carefully chosen. A balance of insulation chart presented from which the thermal resistance required above the vapor barrier may be selected. An example is given to illustrate the effect of increasing the insulation of suspended ceilings, ventilating the ceiling space, and adding a vapor barrier at ceiling level. Particular reference is made to timber oorfs and metal deck roofs. The paper concludes with a presentation of graphs which illustrate the importance of achieveing a satisfactory balance of insulation and which provide an alternative method for selecting the roof and ceiling insulation.
This paper reviews problems concerned with moisture in construction and suggests practices for countering them. The choice of roofing insulation material is discussed. The increased level of insulation brought about by the energy crisis may cause increased condensation problems between a roof deck and suspended ceiling unless the balance of insulation above and below the vapor barrier is carefully chosen. A balance of insulation chart presented from which the thermal resistance required above the vapor barrier may be selected. An example is given to illustrate the effect of increasing the insulation of suspended ceilings, ventilating the ceiling space, and adding a vapor barrier at ceiling level. Particular reference is made to timber oorfs and metal deck roofs. The paper concludes with a presentation of graphs which illustrate the importance of achieveing a satisfactory balance of insulation and which provide an alternative method for selecting the roof and ceiling insulation.
Date
9/1974
9/1974
Author(s)
March, F; Thomas, H
March, F; Thomas, H
Page(s)
Paper 13
Paper 13
Source
Society of Chemical Industry
Society of Chemical Industry
Keyword(s)
moisture control; insulation; condensation; vapor barrier;
moisture control; insulation; condensation; vapor barrier;