Most Read Construction News of the Week: Costs, roofing and iPad apps

We know you have a busy schedule. That's why Construction Dive brings you a rundown of the most popular news items every week, just in case you need to get caught up. This week, news about materials costs, apps for contractors and stats on Energy Star standards got the most views:

Costs for construction materials take a step up again in September—The hikes brought warnings from AGC that some contractors may be at the end of their ability to make a profit.
Phone apps for construction: Decision-making on the spot—A manager at a construction consulting company says the day of app access to company data has arrived.
Software for desktop, iPad puts library of plans in contractors' hands—Contractors report that Plan Grid 2.0 is a great resource because it is comprehensive and fast.
Lab data is available on energy-efficient new roof design—Data is now available from lab testing of a new roof design that is intended to protect houses from temperature extremes year-round.
U.S. says 26% of new homes got an Energy Star last year—Information from the U.S. Energy Information Administration indicates that energy efficiency has a market.