TY - GEN
T1 - Field study on the thermal and hygrothermal performance of insulated ventilated nail base system
AU - Shiao, Ming L.
AU - Miller, William A.
AU - Railkar, Sudhir
AU - Desjarlais, Andre
N1 - Publisher Copyright:
© 2016 U.S. Government.
PY - 2016
Y1 - 2016
N2 - The thermal and hygrothermal performance of a ventilated attic with and without an insulated ventilated nail base (IVNB) system over the roof deck was studied in a hot, humid climate. Seven test attics were constructed and instrumented for monitoring their field performance. Attics with the same configuration but having shingles with increased solar reflectance are also included for comparison. These test attics are instrumented to provide field data of temperature, heat flux, relative humidity, moisture content, and pressure differential across the roofing assemblies. Field data collected over a year suggests that the IVNB system over the roof deck can drastically reduce heat influx during summer and prevent heat loss in winter, which may provide a cost-effective solution for roof retrofitting to achieve high energy savings. During the winter, the IVNB system was found to prevent moisture buildup and, hence, may lower the condensation potential. Hygrothermal analysis of moisture content in roof deck and HVAC energy consumption calculations in various climate zones will be discussed to shed light on the total benefits of IVNB in the scenario of an above-sheathing roof retrofit solution to achieve higher energy savings.
AB - The thermal and hygrothermal performance of a ventilated attic with and without an insulated ventilated nail base (IVNB) system over the roof deck was studied in a hot, humid climate. Seven test attics were constructed and instrumented for monitoring their field performance. Attics with the same configuration but having shingles with increased solar reflectance are also included for comparison. These test attics are instrumented to provide field data of temperature, heat flux, relative humidity, moisture content, and pressure differential across the roofing assemblies. Field data collected over a year suggests that the IVNB system over the roof deck can drastically reduce heat influx during summer and prevent heat loss in winter, which may provide a cost-effective solution for roof retrofitting to achieve high energy savings. During the winter, the IVNB system was found to prevent moisture buildup and, hence, may lower the condensation potential. Hygrothermal analysis of moisture content in roof deck and HVAC energy consumption calculations in various climate zones will be discussed to shed light on the total benefits of IVNB in the scenario of an above-sheathing roof retrofit solution to achieve higher energy savings.
UR - http://www.scopus.com/inward/record.url?scp=85053697882&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:85053697882
SN - 9781939200501
T3 - Thermal Performance of the Exterior Envelopes of Whole Buildings
SP - 305
EP - 316
BT - Thermal Performance of the Exterior Envelopes of Whole Buildings - XIII International Conference
PB - American Society of Heating, Refrigeration, and Air-Conditioning Engineers (ASHRAE)
T2 - 13th International Conference on Thermal Performance of the Exterior Envelopes of Whole Buildings 2016
Y2 - 4 December 2016 through 8 December 2016
ER -
