Abstract
Underlayment for steep slope roofing provides many functions. Most products currently used possess both positive and negative attributes. Identification of the functions that underlayments must perform should promote understanding, solve some current problems, and lead to the development of improved underlayment products and thus better performing steep slope roof systems. This paper describes materials available today, discusses industry problems and issues, reviews research including the ARMA/NRCA-sponsored study of asphalt saturated felt underlayment composition and field performance. Guidelines are provided to minimize wrinkling when the current generation of asphalt-saturated felts materials are used. Compliance iwth ASTM D 226 is strongly recommended. Additionally, design recommendations are offered for underlayments to be used in conjunction with the more common steep sloped roofing systems.
Underlayment for steep slope roofing provides many functions. Most products currently used possess both positive and negative attributes. Identification of the functions that underlayments must perform should promote understanding, solve some current problems, and lead to the development of improved underlayment products and thus better performing steep slope roof systems. This paper describes materials available today, discusses industry problems and issues, reviews research including the ARMA/NRCA-sponsored study of asphalt saturated felt underlayment composition and field performance. Guidelines are provided to minimize wrinkling when the current generation of asphalt-saturated felts materials are used. Compliance iwth ASTM D 226 is strongly recommended. Additionally, design recommendations are offered for underlayments to be used in conjunction with the more common steep sloped roofing systems.
Date
9/1995
9/1995
Author(s)
Dick Fricklas; James Carslon; Terry Simmons
Dick Fricklas; James Carslon; Terry Simmons
Page(s)
10-21
10-21
Keyword(s)
asphalt saturated organic felt; ice dam protection; underlayment self adhering; sheathing paper; steep slope; synthetic; saturate
asphalt saturated organic felt; ice dam protection; underlayment self adhering; sheathing paper; steep slope; synthetic; saturate