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Insulation

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    Air-Sealing and Insulating a High-Performance Shell

    Take pains to seal all possible leaks, then run a blower-door test before insulating.

     
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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...

     
  • Can Fiberglass Batts Perform Well in Tightly Sealed Houses?

    I understand that fiberglass batt insulation can allow air to move through it and that this air movement degrades the insulation's R-value. Two causes I've heard about are wind-washing at the eaves and convective loops that can start in a wall cavity on really cold days and wick warmth from inside...

     
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    Building a High-Performance Shell for a House

    Advanced framing and exterior foam reduce conductive heat loss and provide good air-sealing opportunities.

     
  • Super-Insulated Slab Foundations

    Compacted drainage stone and a thick layer of foam prevent frost damage and keep the heat inside the building.

     
  • Built-Out Trim for Exterior Foam

    PVC trim provided the depth needed to accommodate an inch of insulation board.

     
  • What's New in Insulation?

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

     
  • An Ice Dam Analyzed

    An engineer’s report shows that in snow country, soffit-to-ridge venting is typically the most practical way to prevent ice dams in cathedral ceiling assemblies.

     
  • 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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    Double Insulated

    Owens Corning’s EnergyComplete System has two components: a latex-based spray foam and blown-in fiberglass insulation.

     
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    Can Mold Give You Headaches?

    You bet it can: When it comes to this pervasive fungus, a little can go a long way toward wrecking a job.

     
  • Insulating a Slab With Spray Foam

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

     
  • Letters

    Coordination between subs; barrier-free showers vs. code; don’t ventilate crawlspace with moist outdoor air; code article misses the boat; more

     
  • Retrofitting Exterior Insulation

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

     
  • Dow Structural Insulated Sheathing: A Solution for Coastal Walls?

     
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    Home Performance Contracting

    Careful diagnostic testing is the key to cost-effective energy upgrades.

     
  • 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...

     
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    In the News

    Stringent new energy code offers flexibility; company fined for breaking FTC’s R-value rule; Denver’s moratorium on fees pays off; PV-panel prices decline; more

     
  • R-19 vs. R-20 Wall Insulation

    The federal stimulus plan's energy tax credits for insulation are based on the 2009 IECC, which raises the wall insulation requirement for climate zones 5 and 6 from R-19 to R-20. To meet this requirement, the R-value of the cavity insulation must be at least 3.63 per inch. Does this mean that...

     
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    Installing Exterior Insulation in Cold Climates

    Airtight construction and a thick layer of exterior foam save energy and reduce the risk of rot and mold.

     
 
 
 
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