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Walls

  • 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?

     
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    Plumbing and Straightening Walls

    This quick, accurate method prevents problems with the framing and finishes that follow.

     
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    Robust Walls

    Contributing R-3 to R-7.5 per inch, sheet foam is a handy way to boost a wall's total R-value without adding too much thickness. Rigid foam sheathing can also function well as a drainage plane to help keep wind-blown water out of walls, and it can act as both an air barrier and as a vapor barrier...

     
  • Should Floor Trusses Be Attached to Walls Below?

    Q. What is the proper way to attach an interior basement wall to floor trusses ? both perpendicular walls and walls that run parallel with the bottom chord and fall between the trusses. I have been told to nail directly to the trusses, and I have bee

     
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    Replacing Factory-Built Fireplaces

    When a prefab fireplace wears out, the only solution is to remove it and install a new one. Here are some tips from a specialist.

     
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    Framing an Octagonal Roof

    A master framer safely cuts and assembles a complex bell-shaped turret roof in comfort on the ground before finishing the job with a crane.

     
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    Installing Crown Molding - Production Techniques

    A finish contractor shares his production techniques for cutting and installing crown.

     
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    Q&A: Double-Side Vapor Barrier

    Q: As part of the gut remodel of a 1940 house near Houston, Texas, we installed 3/4-inch rigid foam over the exterior wall sheathing, followed by vinyl siding. On the interior, we exposed the 2x4 studs and installed fiberglass batts. Then we installed 1/2-inch foil-faced rigid foam followed by...

     
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    Q&A: Finishing Basement Walls

    Q: To finish an existing basement, I will be installing 2x4 walls around the perimeter. Should I install some type of waterproofing to the concrete walls? Can the 2x4 walls touch the concrete, or should I leave an air space?

     
  • Q&A: Crawlspace Insulation

    Q: I am building an addition over a 30-inch-high crawlspace. The local inspector has approved my plan to build a sealed crawlspace without ventilation. Should I install rigid foam insulation on the interior of the block walls, or should I insulate between

     
 
 
 
JLC Field Guide to Decking