SEDL / STP / STP790-EB / STP32473S

Lap Joint Strengths of Loose-Laid and Adhered Single-Ply Roof Systems

Dupuis, RM
Vice president and senior laboratory techncian, Structural Research, Inc., Middleton, Wis.

Moody, WR
Vice president and senior laboratory techncian, Structural Research, Inc., Middleton, Wis.

Pages: 12    Published: Jan 1982

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Abstract

A series of lap joint strength and elongation tests were run on plastomeric, elastomeric, and modified bitumen single-ply roof materials. Various lap lengths were used; the effects of high temperature 66°C (150°F) and low temperature −29°C (−20°F) were evaluated also. Loose-laid-membrane lap joints were tested as well as adhered-modified bitumen lap joints. The behavior of modified bitumen lap joints made by torching and hot asphalt were studied as well as their behavior over built-up roofing (BUR) specimens containing a roof split.