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Air & Moisture Barriers

  • Roof Venting in a Wet Climate

    Q: I'm planning to reroof an expanded Cape Cod on a barrier island off the East Coast, where strong winds and moisture from the ocean are common.

     
  • On Site With Zip System Sheathing

    Get faster dry-in and a tighter building envelope without housewrap.

     
  • High-Performance Homes on a Budget

    Well-thought-out details make energy-efficient houses both attractive and affordable.

     
  • Seal Seams In Crawlspace Liners

    The crawlspace of a home was consistently wet — in spite of the 6-mil poly liner. Here's how a builder fixed it to assure long-term durability of the foundation and floor frame.

     
  • Is Rain-Screen Siding Worth the Effort?

    It's good insurance against problems caused by wind-driven rain, but experts wonder whether the additional cost is necessary.

     
  • Waterproofing Membrane for Deck and Fence Posts

    Self-adhesive wrap applied to below-grade section is designed to preventag rot.

     
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    Structural Sheathing With Moisture Barrier From Drywood Products

    Drywood Products. Providing a structural sheathing with a laminated ice and water barrier, Drywood roof and wall panels eliminate the need for felt paper, ice and water shield, and an air infiltration barrier, says the firm. A seam tape provides moisture resistance at abutting edges, valleys...

     
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    Troubleshooting Spray-Foam Insulation

    A lot can go wrong with a two-part plastic insulation that is essentially manufactured on the job site as it’s being applied. Here’s what to look out for.

     
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    How Should I Finish an Existing Basement Wall?

    I am about to start a basement remodel project in a cold climate. I plan to apply a waterproofing product to the inside of the basement wall, then stick a sheet of polyethylene directly to the basement wall over the waterproof coating. Once that is in place, I'll frame a 2x4 wood-frame wall on the...

     
  • What's New in Insulation?

    Improved materials and hybrid systems make it easier to build energy-efficient houses.

     
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    Dry Wall

    Cosella-Dörken’s three-ply Delta Footing Barrier keeps groundwater out of walls by providing a waterproof break between a building’s footing and its foundation

     
  • Wrong-Side Housewrap

    While preparing for an extensive remodeling project, we discovered that the housewrap was installed underneath the exterior 7/16-inch plywood rather than on top. According to the scope of work, we are supposed to install 1/2-inch foam board with taped seams over the entire exterior. Will the...

     
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    Tramex MRH III Moisture Meter

    Tramex's MRH III noninvasive moisture meter measures the moisture content of most building materials, including wood, concrete, masonry, plaster, and drywall.

     
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    JLC Report

    Can replacement windows live up to energy claims?; keeping basements dry; Florida prepares for global warming; more

     
  • Insulating a Slab With Spray Foam

    Closed-cell polyurethane provides a vapor barrier and good R-value in a single application.

     
  • Trowel-Applied Membranes

    Are the new trowel-applied membranes used for waterproofing showers as good as sheet membranes? Are some better than others?

     
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    Installing a Wood Parquet Floor

    Assessing the moisture content and surface condition of the slab was the critical first step.

     
  • Retrofitting Exterior Insulation

    Adding rigid foam to the outside of the shell dramatically increases R-value while reducing thermal conduction.

     
  • Cupped Hardwood Flooring

    Q: Can moisture condense on the back of a prefinished hardwood floor above an uninsulated crawlspace and cause cupping? The flooring was installed over 15-pound asphalt felt and an OSB subfloor; poly covers the ground underneath the dry and ventilated crawlspace of the 2-year-old home.

     
  • Retrofitting a Brick Wall With Insulation

    I'm rehabbing an old brick house in Charleston, W.V. I want to insulate the exterior walls, which are balloon-framed with 2x4s, unsheathed, and finished with brick. There's a 1- to 2-inch air space between the 11/2-story-high frame wall and the brick siding, and a weep system at the base of the...

     
 
 
 
JLC Field Guide to Decking