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Concrete decks are one of the more common types of low-slope roof decks for commercial buildings. Steel and wood roof decks are the other most common types. Concrete roof decks make up approximately 13-14% of the new and retrofit low-slope construction market, according to the National Roofing Contractors Association (NRCA) 2015-2016 Market Survey. This article examines the advantages of concrete roof decks, the various types, and some of the precautions that should be taken to ensure success.
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Concrete decks are one of the more common types of low-slope roof decks for commercial buildings. Steel and wood roof decks are the other most common types. Concrete roof decks make up approximately 13-14% of the new and retrofit low-slope construction market, according to the National Roofing Contractors Association (NRCA) 2015-2016 Market Survey. This article examines the advantages of concrete roof decks, the various types, and some of the precautions that should be taken to ensure success.
Introduction Wind design of roof systems can be confusing from an engineering perspective. Wind design can also be confusing because the International Building Code (IBC) provides specific requirements, but so does Factory Mutual (FM). If FM is specified, do the IBC requirements need to be followed? What is the wind-design strategy for FM-insured and non-FM-insured buildings? This blog will discuss the following:
Cool roofs can help save you money on energy bills* in the North as well as the South. Here are some cool truths to ponder when planning a new roof.* TRUTH 1: It's All About Reflectivity A cool roof reflects the sun's rays away from the roof, helping to reduce rooftop temperatures. While a sunlight-absorbing black roof can reach up to 190°F in the summer, a reflective roof's temperature can be as much as 55°F lower. Dark surfaces also contribute to the urban heat island effect. (SOURCE: heatisland.lbl.gov/coolscience/cool-roofs)
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A common question being asked in the roofing industry is whether or not the 2016 version of ASCE 7 is going to increase the design wind pressures acting on a building. The answer is "yes" in many cases. So, the follow up question is "by how much?" And, that leads to the next question, "how much more capacity will roof systems be required to have when wind design follows ASCE 7-16?"
What are the key material properties?In a previous article the use of thermal inertia to slow down heat flux through a roof assembly was discussed. In buildings where air conditioning costs dominate and heating use is relatively low, higher thermal inertia assemblies can potentially improve energy efficiency. This is particularly the case of buildings such as offices that are only occupied during daylight hours. Thermal inertia could delay the transmission of heat into a building towards the end of the day, increasing thermal comfort and allowing facility managers to reduce cooling during the day.
Thermal insulation is an important part of commercial roofing assemblies. As with anything, there are ways to design with and install polyiso insulation — a better way, a best way, and many variations in-between! What may be best in terms of lowest up-front costs, may prove only good or worse over the long-term life of the building.
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VIDEOS FROM GAF
VIDEO ARTICLE
Air Barrier vs. Vapor RetarderWelcome to Episode 4 of The Building Science FAQ series.The Building Science FAQ video series explores some of the technical questions that crop up when specifying a low-slope roof.
VIDEO ARTICLE
Air Barrier vs. Vapor RetarderWelcome to Episode 4 of The Building Science FAQ series.The Building Science FAQ video series explores some of the technical questions that crop up when specifying a low-slope roof.
VIDEO ARTICLE
Air Barrier vs. Vapor RetarderWelcome to Episode 4 of The Building Science FAQ series.The Building Science FAQ video series explores some of the technical questions that crop up when specifying a low-slope roof.
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