flexiblefullpage -
billboard - default
interstitial1 - interstitial
Currently Reading

Want greater energy savings? The answer is right above you

Sponsored Content Metals

Want greater energy savings? The answer is right above you

Jeff Alexander | January 30, 2015
Want greater energy savings? The answer is on your roof

A recent study compared the possible energy savings of metal vs. asphalt roofs by doing field testing on an asphalt shingle roof and a stone-coated metal shake roof.

Not all energy saving products and techniques are equal. In fact, not all of them are even widely known.

Recently, a study funded by the U.S. Department of Energy and conducted by the Oak Ridge National Laboratory (ORNL) found significant cost savings by creating air space under metal roofing systems.

The study compared the possible energy savings of metal vs. asphalt roofs by doing field testing on an asphalt shingle roof and a stone-coated metal shake roof, both with comparable solar reflectance and thermal emittance levels. The asphalt shingle was directly nailed to the roof deck, with no air space underneath, while the dark-gray metal shake was attached to a batten/counter-batten system that allowed for airflow underneath.

The scientists from ORNL discovered a 45% reduction in heat flow for the metal shake; about 15% of that reduction was attributed to solar reflectance and an additional 30% of the heat flow reduction was due to above-sheathing ventilation.

In cool or cold weather conditions, scientists confirmed that direct-nailed asphalt shingle roofs had significantly larger heat loss than attics with metal shakes and above-sheathing ventilation. The air gap appears to serve as an insulating layer, reducing heat transfer by 50% as compared to asphalt.

The study results have been corroborated by Florida Solar Energy Center and accepted by the ASHRAE SSPC 90.1 subcommittee, indicating that any type metal roof can save a home or building owner up to 25% in annual cooling energy costs compared to a dark-gray asphalt shingle.

Read more from the Star Buildings Insight Warehouse blog.

More from Author

Jeff Alexander | Mar 19, 2019

Green innovation in the construction industry

Although individual companies can make a difference, collaboration is crucial for creating the most significant impact.

Jeff Alexander | Aug 17, 2018

Anti-graffiti coatings keep projects pristine

The Sherwin-Williams Coil Coating products you know and trust are designed to keep your buildings beautiful and free of graffiti.

Jeff Alexander | Aug 7, 2018

8330 On the River

 A housing community offering beautiful views of the Detroit River and Belle Isle as the city's waterfront is undergoing dramatic restoration.

Jeff Alexander | Jul 31, 2018

Color trends: Hit pause

Color has the power to help us go within and reset.

Jeff Alexander | Jul 24, 2018

Metal roofs take the residential market by storm

As metal roofing soars in popularity, so do the aesthetic options. 

Jeff Alexander | Jan 15, 2018

Metalescent coatings bring shimmer to projects

Achieve a vibrant, metallic finish with only two coats

Jeff Alexander | Dec 28, 2017

Cool coatings reduce heat islands

Innovative products can help lower energy costs and mitigate the heat island effect

Jeff Alexander | Dec 19, 2017

Which Fluropon coating is best for your next project?

Energy efficiency is a top priority to lower operating costs and protect the environment.

Jeff Alexander | Dec 13, 2017

Why are Valspar’s 70% PVDF coatings world famous?

Our two-coat formulation of fluoropolymer resin ensures exceptional color and durability in a variety of climates.

Jeff Alexander | Nov 28, 2017

What is PVDF?

PVDF coatings are a resin-based coating system.

boombox1 - default
boombox2 -
native1 -

More In Category

halfpage1 -

Most Popular Content

  1. 2021 Giants 400 Report
  2. Top 150 Architecture Firms for 2019
  3. 13 projects that represent the future of affordable housing
  4. Sagrada Familia completion date pushed back due to coronavirus
  5. Top 160 Architecture Firms 2021


Magazine Subscription

Get our Newsletters

Each day, our editors assemble the latest breaking industry news, hottest trends, and most relevant research, delivered to your inbox.


Follow BD+C: