Three recent app releases aim to raise the bar on roof-estimating tools. Two of them are free and modest in function, although one reaches for the stars. The other is pricey and complex by app standards. Photo by Tom Sawyer PITCH PERFECT Pitch Gauge 2.0 has a calculator that converts measurements into estimates of materials. One roofing contractor calls it a must-have. At the modest end of the spectrum is a roof-pitch-measuring app called Pitch Gauge 2.0, which came out this month for Android smart phones. The app, also available for the iPhone, uses the smart phone's gyroscope to read
The 2016 Summer Olympics boating and swimming events have put an international spotlight on what has been a long-running problem in Rio de Janeiro—untreated sewage and trash are clogging up major bays and waterways.