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Abstract
With each issue of Project Pinpoint, a roofing industry association's survey of contractor-reported roofing system problems, recurring problems are reported in the performance of flat roofing systems. Many of the problems noted in the survey in 1988 are again reported in 1994. Problems such as failure of single ply seams, blisther and splits in built-up roofing membranes, and flashing problems in all systems are found in the studies year after year. These problems cost this country millions of dollars in lost energy because the underlying insulation gets wet and loses R-value. Additional energy is consumed in the repair and replacement of materials due to these failures. There are solutions to these recurrent problems, and the costs for the solutions can be calculated and pplied to the original cost of the roof with the exptected life extension included. These techniques have been developed to study recurrent problems with automobiles and have been applied to other industries. The Tagucci techniques can be applied to flat roofing and the most economical solutions can be demonstrated. Tagucci has shown that by making just some parts more robust the entire automobile will last longer and perform better. The Tagucci technique uses statistics developed from warranty repair records and then focuses on the areas that are most vulnerable. The success is shown in the significantly improved Japanese car, and now the same results are being realized in the manufacure of American cars. This paper will use the data from Project Pinpoint and other sources to statistically quantify the problem. Suggestions to help fix or eliminate the problems will be explored. Costs will be developed for the various solutions and their long-term impact will be applied. The corrective measures for the specific problems will be cost evaluated and ranked.
With each issue of Project Pinpoint, a roofing industry association's survey of contractor-reported roofing system problems, recurring problems are reported in the performance of flat roofing systems. Many of the problems noted in the survey in 1988 are again reported in 1994. Problems such as failure of single ply seams, blisther and splits in built-up roofing membranes, and flashing problems in all systems are found in the studies year after year. These problems cost this country millions of dollars in lost energy because the underlying insulation gets wet and loses R-value. Additional energy is consumed in the repair and replacement of materials due to these failures. There are solutions to these recurrent problems, and the costs for the solutions can be calculated and pplied to the original cost of the roof with the exptected life extension included. These techniques have been developed to study recurrent problems with automobiles and have been applied to other industries. The Tagucci techniques can be applied to flat roofing and the most economical solutions can be demonstrated. Tagucci has shown that by making just some parts more robust the entire automobile will last longer and perform better. The Tagucci technique uses statistics developed from warranty repair records and then focuses on the areas that are most vulnerable. The success is shown in the significantly improved Japanese car, and now the same results are being realized in the manufacure of American cars. This paper will use the data from Project Pinpoint and other sources to statistically quantify the problem. Suggestions to help fix or eliminate the problems will be explored. Costs will be developed for the various solutions and their long-term impact will be applied. The corrective measures for the specific problems will be cost evaluated and ranked.
Date
12/1995
12/1995
Author(s)
David Roodvoets
David Roodvoets
Page(s)
709-716
709-716
Keyword(s)
Project Pinpoint data; problem roofs; flat roof system;
Project Pinpoint data; problem roofs; flat roof system;