Walls

Double Stud Wall / Floor Truss Connection

Double Stud Wall / Door Head with Furring

Double Stud Wall / Vaulted Ceiling

Double Stud Wall / Slab on Grade w/Stem Wall

Double Stud Wall / Window Sill with Furring

Double Stud Wall / Floor Truss to ICF Foundation

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Fastening Furring Strips to a Foam-Sheathed Wall

A screw manufacturer provides advice on how many screws you need

Posted on Nov 26 2010 by Martin Holladay

UPDATED March 1, 2012

If you’re building a house with foam sheathingMaterial, usually plywood or oriented strand board (OSB), but sometimes wooden boards, installed on the exterior of wall studs, rafters, or roof trusses; siding or roofing installed on the sheathing—sometimes over strapping to create a rainscreen. , and your siding is installed over vertical rainscreenConstruction detail appropriate for all but the driest climates to prevent moisture entry and to extend the life of siding and sheathing materials; most commonly produced by installing thin strapping to hold the siding away from the sheathing by a quarter-inch to three-quarters of an inch. strapping installed on top of the foam, how should you attach the strapping? Most builders screw the strapping through the foam into the studs; so far, so good. But what length screws should you use? And how closely should you space the screws?


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Image Credits:

  1. Image #1: Rob Wotzak
  2. Image #2: FastenMaster
  3. Image #3: Cold Climate Housing Research Center
  4. Image #4: JLC
  5. Image #5: Dow Building Solutions

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How Risky Is Cold OSB Wall Sheathing?

The thicker your wall, the colder your sheathing. If you build a very thick wall, will your sheathing stay cold and wet?

Posted on Nov 5 2010 by Martin Holladay

During the winter months, wall sheathingMaterial, usually plywood or oriented strand board (OSB), but sometimes wooden boards, installed on the exterior of wall studs, rafters, or roof trusses; siding or roofing installed on the sheathing—sometimes over strapping to create a rainscreen. is usually cold. Cold sheathing is risky, since it tends to accumulate moisture during the winter. Unless the sheathing can dry out during the summer months, damp sheathing can rot.


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Image Credits:

  1. GreenBuildingAdvisor

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Calculating the Minimum Thickness of Rigid Foam Sheathing

In this case, the code is your friend — just follow the IRC’s foam thickness table

Posted on Oct 15 2010 by Martin Holladay

UPDATED on February 26, 2016 with a new table (Image #3)

If you plan to install exterior rigid foam on the walls of your house, how thick should the foam be? Although the GBAGreenBuildingAdvisor.com Web site has addressed this question several times in our Q&A column and various blogs, the question continues to perplex readers. New questions along these lines come our way regularly.

The last time I answered the question was at the end of a long, very technical blog. In this blog, I'll cut to the chase.


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Image Credits:

  1. Image #1: Ty Keltner, Cold Climate Housing Research Center
  2. Image #2: U.S. Department of Energy
  3. Image #3: Martin Holladay

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Are Dew-Point Calculations Really Necessary?

How to perform dew-point calculations — and why it's possible to design a high-performance wall without performing calculations or consulting a psychrometric chart

Posted on Sep 17 2010 by Martin Holladay

Most builders understand that condensation can form when warm, moist air encounters a cold surface. Condensation is bad, and builders want to avoid it. There’s a solution, though: According to building scientists, we can prevent condensation problems in walls by determining a wall’s temperature profile and performing a dew-point calculation. This calculation may require the use of a psychrometric chart.


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Image Credits:

  1. ASHRAE Fundamentals
  2. Energy Design Update
  3. International Residential Code

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