January 01, 2007
What are you going to do about that black stuff on your old roof?” a friend asked me this summer after viewing the new addition to my home and comparing its pristine, clean shingles to the adjacent, original, 10-year-old roof. “What is that stuff?” I asked. “I think it's mold,” he replied. “What can you do?” I shrugged. “You're the one who works for the roofing people,” he said. “Find out.” So over the next few weeks, in the course of my job as director of publications for RCI, I asked a few of the consultants I routinely deal with about the “black stuff” on my roof. I got some interesting and varied suggestions (some being unprintable), but the most ultimately enlightening (and frustrating) one came from Interface's senior editor and my friend Lyle Hogan, RRC, FRCI, PE: “You're a reporter, aren't you?” Forced, reluctantly, to find my own answers, I did some research.
February 01, 2005
This is part two of a two-part series on waterproofing membranes under green (garden) roofs. The first part, published last month, traced the history of waterproofing membranes under plazas and earth-covered, below-grade spaces, and discussed the various types of waterproofing systems currently marketed and their advantages and disadvantages for use under green roof systems. This part covers the attributes of candidate membranes and offers a list of minimum physical properties proposed to satisfy the specific needs for those membranes exposed to continuous moist environments, aggressive chemicals, root invasion, and abusive maintenance. Additionally, it discusses failures and offers case studies to illustrate them.
January 01, 2005
By Justin Henshell Link to part 1: https://iibec.org/wp-content/uploads/2016/04/2005-01-henshell.pdf