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

Register for full online access.

 
 
 
 

Air & Moisture Barriers

  • Image

    Products

    All-in-one flashing panel; spray-foam insulation; shower seat; lightweight steel beams; grass driveway mats; push-fit fittings; more

     
  • Soundproofing Drainpipes

    Is there a way to dampen the sound of a PVC waste pipe, other than tearing out the plastic and installing cast iron?

     
  • Removing Kerdi Epoxy Grout With Heat

    Q: Using a heat gun is an approved method for removing cured epoxy grout from tiles and fixtures [see Q&A, 5/08]. But can the same technique be used when the tile has been installed over Schluter’s Kerdi waterproofing membrane, or would the heat damage the membrane?

     
  • Is It Safe to Retrofit Exterior Foam Insulation?

    Q: I built a lot of homes in upstate New York in the 1980s using 2x6 studs, fiberglass batts, and a poly vapor retarder for the shell. Given the rising cost of heating and cooling, the owners are asking about energy upgrades to their walls. I'd like to suggest adding 1 or 2 inches of rigid foam on...

     
  • Image

    Rescuing a Manufactured-Stone Wall

    A properly flashed water-resistant drainage plane is essential when installing stone veneer over a wood-framed wall.

     
  • Image

    Brick Veneer That Works

    Despite the inherent strength of brick, a brick veneer wall is not invulnerable during a storm. If the wind blows hard enough, poorly secured brick veneer can literally crumble. And because bricks and mortar are porous, they can transmit moisture to the main wall if that wall has not been properly...

     
  • Image

    Waterproofing A Rooftop Deck

    A kitchen bump-out provided the perfect opportunity for a small terrace off the master bedroom.

     
  • Image

    Adding Under

    With nowhere to go but down, this basement addition carves out extra living space from within the home’s existing footprint.

     
  • Image

    Gluing Wood Flooring to Concrete

    A successful job starts with a moisture test.

     
  • Overdriven Fasteners in ZIP System Sheathing

    Q. When fastening ZIP System sheathing to wall and roof framing with our pneumatic nailers, we've found that it's difficult to keep nail heads from penetrating the applied protective barrier on the face of the panels. Won't these holes compromise the moisture barrier's integrity and lead to...

     
  • Do Precast Foundation Walls Need Waterproofing?

    Q: Are precast concrete foundation walls subject to the same dampproofing or waterproofing requirements as cast-in-place and block foundations? I've heard that because these walls are made of a high-strength concrete that's virtually nonporous and impervious to water, they don't require extra...

     
  • Image

    A Close Look at Common Energy Claims

    Understanding energy consumption and moisture movement in the homes we build is hard enough; rampant half-truths and misconceptions only make it harder.

     
  • Image

    Products

    Housewrap; asphalt roofing

     
  • Vapor Retarders and Building Inspectors

    Q: I'm building a house in North Carolina, which has a mixed-humid climate (climate zone 3). My local building inspector - backed up by his boss - requires a polyethylene vapor retarder on the interior side of cellulose-insulated walls. My insulation contractor says that interior polyethylene is...

     
  • Image

    How to Reduce the Risk of Mold Claims

    Mold has been around for millennia, but in recent years public concern about its presence in homes and buildings has metastasized into near hysteria. This has spawned a legal atmosphere in which it's relatively easy for unscrupulous owners to fabricate huge mold lawsuits against contractors.

     
  • Image

    Soundings: Understanding Water Intrusion

    Understanding Water Intrusion

     
  • Image

    Insulation That Works

    In more than 25 years of consulting with builders on ways to avoid callbacks, Steve Easley has spent his time solving problems related the heat and moisture transfer, because this is where builders — even very good builders who deliver well-appointed homes to the coastal elite — most often get...

     
  • Image

    Soundings

    Fasteners for Treated Wood: Practical Solutions for Coastal Environments

     
  • Image

    Weather Barriers for Coastal Conditions

    According to general contractor Bill Robinson, the building industry is going through a renaissance of sorts when it comes to weather protection. He predicts that as the current best practices become standardized, even more detailed requirements will be brought back to the codes. And that's a good...

     
  • Flash-and-Batt Insulation: Good Idea or Bad Practice

    Q: Is the flash-and-batt technique - where an inch or two of spray-foam insulation is applied to the interior side of roof or wall sheathing before fitting rafter and stud bays with fiberglass batts - a good way to insulate?

     
 
 
 
JLC Field Guide to Decking