Are you a subscriber but don’t have an online account?

Register for full online access.

 
 
 
 

Featured Articles

  • Working With Flexible Flashing (Subscriber content)

    Some contractors still don’t understand how to get the most out of these products. Here are some tips for installations that stand firm for the long haul.

     
  • Making the Case for Zero-Leak Ducts

    Mike MacFarland outlines the benefits of leak-free ducts.

     
  • Standardized Energy Retrofits

    Can we tell what an older house will need as an energy upgrade simply by identifying it's building type? Can these standardized energy improvements be applied without an audit? Just how effective can they be? These are a few of the questions that a few Building America research teams have been...

     
  • When it comes to improving the energy efficiency of a building, lots of attention is paid to insulation R-values, thermal bridges, and air sealing. But dont forget the windows, which account for the biggest energy loss in a high-R wall.

    To Improve the Energy Performance of Walls, Look at Total R-Value (Subscriber content)

    Today’s builders are learning to mitigate thermal bridging by using alternative framing techniques, continuous exterior rigid foam products, or both.

     
  • Insulating Cathedral Ceilings (Subscriber content)

    JLC executive editor Clayton DeKorne explores some practical solutions to prevent call backs and boost energy performance.

     
  • Beware the Insulator Who Does Not Include Air Sealing

    Finally, word in the consumer press is catching up with building science ... almost.

     
  • Tight House Construction - Sealing Exterior Sheathing Seams

    In my quest to build ever tighter houses I've decided that my goal is for every house I build to get as close to 1ACH50 as possible. To reach that goal, I've decided to take a page from the PassiveHouse playbook and tape my exterior sheathing seams.

     
  • Encapsulating ducts with at least 1 1/2 inches of closed-cell spray foam substantially improves HVAC performance in all U.S. climate zones. Burying the encapsulated ducts in loose-fill attic insulation improves performance even more.

    Buried and Encapsulated Ducts (Subscriber content)

    Encapsulating ducts with at least 1 1/2 inches of closed-cell spray foam substantially improves HVAC performance in all U.S. climate zones. Burying the encapsulated ducts in loose-fill attic insulation improves performance even more.

     
  • Building Above-Code Walls (Subscriber content)

    Four design/build teams solve the puzzle of high-performance wall construction—in four different ways.

     
  • Building Above-Code Walls - Belfast, Maine, Cohousing Units (Subscriber content)

    Four design/build teams solve the puzzle of high-performance wall construction—in four different ways.

     
  • Building Above-Code Walls - Maine Single-Family Home (Subscriber content)

    The wall system shown here is an improved version of the system I used for the house I built in Knox, Maine, in 2011.

     
  • Building Above-Code Walls - "Avalon" a Connecticut Farmhouse (Subscriber content)

    Our wall example is part of a zero-energy single-family house built for the tenant farmer of an organic farm in rural Connecticut.

     
  • Building Above-Code Walls - Norwich, Vermont Single-Family Home (Subscriber content)

    Our challenge was to realize the owners distinctive artistic vision for their home, along with their very ambitious energy-efficiency goals, while also working within the hard limits of the budget.

     
  • Thermal Imaging With a Blower Door (Subscriber content)

    Though it's impossible to seal every hole in an existing building to prevent air leaks, here's a procedure you can use to identify the worst leaks in order to tighten the home as cost-effectively as possible.

     
  • Best Practices: Continuous Exterior Insulation (Subscriber content)

    A guide to selecting and installing rigid foam on walls.

     
  • Venting the Crawlspace (Subscriber content)

    Most crawlspaces are vented to the outdoors, but encapsulating the crawlspace has gained favor among builders of green and energy-efficient homes. But what do you do about the air down there?

     
  • Image

    Top 10 Building Science Secrets (Subscriber content)

    Overall, the state of the construction industry is improving. Many builders and remodelers are learning, either out of interest or coercion, about building science and how to apply it. Here are 10 secrets that will keep you ahead of the game.

     
  • Image

    A Historic Building Gets an Energy Upgrade (Subscriber content)

    Satisfying the commissions while bringing an 1840s building up to 21st-century energy-efficiency standards presented a challenge

     
  • Image

    Straight Answers About Efficient Windows (Subscriber content)

    Four independent experts weigh in on low-E coatins, orientation-specific glazing, window-selection tools, and more

     
  • Image

    Lessons Learned on Energy-Efficient Affordable Housing (Subscriber content)

    Practical insights on combining deep energy retrofits with affordable housing for 12 Cleveland homes

     
 
 
 
 
JLC Field Guide to Decking