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Air & Moisture Barriers

  • Scuppers and Drains for Waterproof Decks

    The worst dry-rot damage usually occurs where drains and scuppers penetrate a deck. Here’s how to avoid it.

     
  • Insulating Cathedral Ceilings (Subscriber content)

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

     
  • At wide spots in the trench, the foam is poured to a consistent thickness against a sheet of OSB.

    Retrofit Exterior Foundation Insulation (Subscriber content)

    Is there a minimally invasive, cost-competitive, easily deployable method of upgrading soil-side foundation insulation in existing buildings? Read on.

     
  • On Site With Liquid Flash (Subscriber content)

    We try out Huber's Zip System Liquid Flash on a few windows that we were installing, as well as on pipe penetrations, to see how it performs.

     
  • 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.

     
  • PVC Ceiling

    Zip-Up Ceiling offers a quick way to finish a basement ceiling: Install trim around the perimeter, then infill with paintable PVC panels and hidden rails that can be unzipped later for cleaning and overhead access.

     
  • Advanced Building Products Mortairvent Membrane

    Suitable for all exterior siding applications, this rainscreen technology creates a drainage and ventilation cavity between the weather resistant barrier and the exterior wall.

     
  • Rigid Rock Wool

    Designed for use as exterior continuous insulation in rainscreen wall systems, Comfortboard CIS repels water but is breathable enough to allow outward wall drying.

     
  • Replacing the Trim Around a Classic Doorway (Subscriber content)

    Upgrading the trim on a vintage home such as this one gives an old doorway a new life.

     
  • Stick-on stone worse than EIFS?

    The wall failures associated with adhered concrete masonry veneer (ACMV) are mounting and could dwarf the problems once associated with synthetic stucco.

     
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    Insulated Structural Sheathing

    Zip System R-Sheathing combines a Zip panel and polyiso foam

     
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    Sticks to Concrete

    Florprufe polyolefin vapor barrier glues itself to the underside of a concrete slab

     
  • Mixing Cladding and Stick-On Stone (Subscriber content)

    Make sure you get the water-management details right the first time around

     
  • Some roofers install underlayment vertically over short steep roof decks to provide quicker protection from the weather, but not all building inspectors will approve this practice. In general, the IRC specifies horizontal underlayment installation.

    Roofing Underlayment

    Does the direction of the underlayment matter?

     
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    Self-Adhered Housewrap

    BlueskinVP serves as both housewrap and air barrier

     
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    Crawlspace Cover

    The 8 Mil Floor Liner is durable and easy to install, says the maker

     
  • Slideshow: Flashing a Flanged Window with Housewrap and Flashing Tape

    Veteran builder Carl Hagstrom demonstrates the right way to install a flanged window unit by detailing the housewrap and flashing tape.

     
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    Stabilizing a Brick Exterior (Subscriber content)

    Unstable brick is tied to the floor framing with standard hold downs, threaded rod, and compression plates

     
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    Flashing and Trimming a Window

    This methodical approach speeds the work and guarantees a durable, weathertight installation

     
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    Self-Stick Housewrap

    This vapor-permeable, water-resistive air barrier requires no mechanical fasteners.

     
 
 
 
JLC Field Guide to Decking