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INSULATION IDENTIFICATION GUIDE
INSULATION INSPECTION & IMPROVEMENT
AIR BYPASS LEAKS
AIR LEAK DETECTION TOOLS
AIR LEAK MINIMIZATION
AIR POLLUTANTS, COMMON INDOOR
AIR LEAK SEALING PROCEDURE
AIR SEALING STRATEGIES
ASBESTOS FLOORING HAZARD REDUCTION
ASBESTOS-FREE INSULATION MATERIALS
ASBESTOS IDENTIFICATION IN buildings
ATTIC LEAKS, CONDENSATION & MOLD

BATHROOM VENTILATION
BASEMENT LEAKS, INSPECT FOR
BASEMENT CEILING VAPOR BARRIER
BASEMENT HEAT LOSS
BIOGAS PRODUCTION & USE
BLOWER DOORS & AIR INFILTRATION
BLOWER FAN CONTINUOUS OPERATION
BLOWER FAN OPERATION & TESTING
BLOWN-IN INSULATION
BRICK LINED WALLS
BRICK VENEER WALL INSULATION
BRICK VENEER WALL Loose, Bulged
BRICK WALL DRAINAGE WEEP HOLES
BUCKLED FOUNDATIONS due to INSULATION?
BUILDING NOISE DIAGNOSIS & CURE

CATHEDRAL CEILING INSULATION
CATHEDRAL CEILING VENTILATION
CEILING FINISHES INTERIOR
CEILINGS, DROP or SUSPENDED PANEL
CEILINGS, PLASTER TYPES
CHIMNEY INSPECTION DIAGNOSIS & REPAIR
COOLING LOAD REDUCTION by ROOF VENTS
COMBUSTION AIR for TIGHT BUILDINGS
CONDENSING BOILERS/FURNACES DAMAGE
CONDENSATION or SWEATING PIPES, TANKS
COOLING LOAD REDUCTION by ROOF VENTS
CRAWL SPACES

DEHUMIDIFICATION PROBLEMS
DEW POINT CALCULATION for WALLS
DEW POINT TABLE - CONDENSATION POINT GUIDE
DEFINITION of Heating & Cooling Terms
DRYER VENTING
DUCT SYSTEM & DUCT DEFECTS

ELECTRIC HEAT
ELECTRIC POWER, PHOTOVOLTAIC, REMOTE SITE

ENERGY SAVINGS in buildings
  AFUE DEFINITION, RATINGS
  AIR BYPASS LEAKS
  AIR CHANGE RATE ACH HEAT SAVINGS
  AIR CONDITIONING HEAT PUMP SAVINGS
  AIR LEAK SEALING PROCEDURE
  APPLIANCE EFFICIENCY RATINGS
  ATTIC LEAKS, CONDENSATION & MOLD
  COOLING LOAD REDUCTION by ROOF VENTS
  DRYER VENTING
  ENERGY AUDIT - How to Use a Free One
  ENERGY SAVINGS MAXIMIZE RETURNS ON
  ENERGY SAVINGS PRIORITIES
  ENERGY SAVINGS RETROFIT CASE STUDY
  ENERGY SAVINGS RETROFIT LEAK SEALING GUIDE
  ENERGY SAVINGS RETROFIT OPTIONS
  ENERGY STAR PROGRAM
  ENERGY USE MONITORING
  GLASS vs HEAT MIRROR SOLAR GAIN/Loss
  HEAT LOSS in buildings
  HEATING COST SAVINGS METHODS
  HIGH MASS TRADEOFFS, HEATING vs COOLING
  HOUSE DOCTOR, how-to be
  INSULATION INSPECTION & IMPROVEMENT
  INSULATION LOCATION - WHERE TO PUT IT
  RADIANT BARRIERS
  REFLECTIVE INSULATION
  ROOF COLOR RECOMMENDATIONS
  Skylight Energy Efficiency
  SOLAR ENERGY SYSTEMS
  THERMAL MASS in buildings
  TIMERS for ELECTRIC WATER HEATERS
  VENTILATION, BALANCED HEAT COST SAVINGS
  WIND ENERGY SYSTEMS
  WINDOW EFFICIENCY Features & Ratings
  WOOD, COAL STOVES & FIREPLACES
ENVIRONMENTAL HAZARDS - INSPECT, TEST, REMEDY
EXTERIOR WALL SIDING TRIM & FINISHES

FIBERGLASS INSULATION
FIBERGLASS HAZARDS
FIBERGLASS PARTICLE CONTAMINATION TEST
FIBERGLASS INSULATION MOLD

FLOOD DAMAGE ASSESSMENT, SAFETY & CLEANUP
FOOTING & FOUNDATION DRAINS
FOUNDATION CRACKS & DAMAGE GUIDE
FOUNDATION WATERPROOFING
FRAMING DAMAGE, INSPECTION, REPAIR
FRAMING DETAILS for BETTER INSULATION
FRAMING DETAILS for DOUBLE WALL HOUSES
FRAMING METAL STUD PERFORMANCE
FRAMING MATERIALS, Age, Types
FRAMING METAL STUD PERFORMANCE
FRAMING METHODS, Age, Types
FRAMING SIZE & Spacing, Age, Types
FRAMING TABLES, SPANS for DECKS
FREEZE-PROOF A BUILDING
FRT PLYWOOD
GREEN BUILDING CONSTRUCTION CODES GUIDES
GREENHOUSE DESIGN for SOLAR HEATING
GREENHOUSE / SUNSPACE GLARE

HEAT LOSS in BUILDINGS
HEAT LOSS DETECTION TOOLS
HEAT LOSS INDICATORS
HEAT LOSS PREVENTION PRIORITIES
HEAT LOSS R U & K VALUE CALCULATION
HEAT LOSS RATE CALCULATIONS
HOT ROOF DESIGNS: Un-Vented Roof Solutions
HOUSEWRAP AIR & VAPOR BARRIERS
HOUSE DOCTOR, how-to be
HUMIDITY LEVEL TARGET

ICE DAM PREVENTION

INDOOR AIR QUALITY & HOUSE TIGHTNESS

INSULATION CHOICES
Insulation Air & Heat Leaks
INSULATION FACT SHEET- DOE
INSULATION for GREENHOUSE or SOLARIUM
INSULATION IDENTIFICATION GUIDE
INSULATION INSPECTION & IMPROVEMENT
INSULATION LOCATION - WHERE TO PUT IT
  INSULATION LOCATION & QUANTITY for ATTICS
  INSULATION LOCATION for BASEMENT FLOORS
  INSULATION LOCATION for BASEMENT WALLS
  INSULATION LOCATION for BRICK or BLOCK WALL CAVITY
  INSULATION LOCATION for BRICK VENEER WALLS
  INSULATION LOCATION for CAPES, CRAWLSPACES
  INSULATION LOCATION for CATHEDRAL CEILINGS
  INSULATION LOCATION for GREENHOUSE or SOLARIUM
  INSULATION LOCATION for PASSIVE SOLAR FLOOR SLAB
  INSULATION LOCATION & EXTENT for SLABS
  INSULATION LOCATION for SOUND CONTROL
  INSULATION LOCATION for SUSPENDED PANELS
  INSULATION LOCATION for SWIMMING, INDOOR
INSULATION MOLD
INSULATION R-Values & Properties

ICE DAM PREVENTION
INSULATION IDENTIFICATION GUIDE
INSULATION INSPECTION & IMPROVEMENT

LEAD POISONING HAZARDS GUIDE
LEED GREEN BUILDING CERTIFICATION
LOG HOME ENERGY EFFICIENCY
LOG HOME GUIDE

MOISTURE CONTROL in BUILDINGS
BASEMENT LEAKS, INSPECT FOR
MOLD in FOAM INSULATION, RESISTANCE
MOISTURE CONTROL in BUILDINGS
MSDS Material Safety Data Sheets
MVOCs & MOLDY MUSTY ODORS
MYCOPHOBIA, STAINS MISTAKEN for MOLD
MYCOTOXIN EFFECTS of MOLD EXPOSURE

Nanomaterials Hazards
NOISE / SOUND DIAGNOSIS & CURE
NOISE CONTROL for HEATING SYSTEMS
NOISE CONTROL for FLOORS
NOISE CONTROL for PLUMBING
NOISE CONTROL for ROOFS

ODORS & SMELLS DIAGNOSIS & CURE

PASCAL CALCULATIONS

RADIANT BARRIERS
ROT, FUNGUS, TERMITES
ROT, TIMBER FRAME
SHEATHING, FOIL FACED - VENTS
SOLAR ENERGY SYSTEMS
SOUND CONTROL in buildings
STAIN DIAGNOSIS on BUILDING INTERIORS

THERMAL MASS in buildings
  THERMAL MASS FLOOR SLABS
  THERMAL MASS in UPSTAIRS
  THERMAL MASS WALL DESIGN
  THERMAL MASS in HOMES - STUDY
  THERMAL MASS TRADEOFFS, HEATING vs COOLING

THERMAL TRACKING & HEAT LOSS

VAPOR BARRIERS & CONDENSATION in buildings
  ATTIC CONDENSATION CAUSE & CURE
  BASEMENT CEILING VAPOR BARRIER
  CONDENSATION or SWEATING PIPES, TANKS
  CRAWL SPACE VAPOR BARRIER
  DEW POINT CALCULATION for WALLS
  DEW POINT TABLE - CONDENSATION POINT GUIDE
  FELT 15# ROOFING, as HOUSEWRAP/VAPOR BARRIER
  HOUSEWRAP AIR & VAPOR BARRIERS
  HOUSEWRAP INSTALLATION DETAILS
  HOUSEWRAP PRODUCT CHOICES
  HOUSEWRAP at SILLS, SOLES, TOP PLATES
  HUMIDITY LEVEL TARGET
  MOISTURE CONTROL in BUILDINGS
  RAIN SPLASH-UP SIDING DAMAGE
  VAPOR BARRIERS & AIR SEALING at BAND JOISTS
  VAPOR BARRIERS & CONDENSATION in buildings
  VAPOR BARRIERS & HOUSEWRAP
  VAPOR CONDENSATION & BUILDING SHEATHING
  WATER BARRIERS, EXTERIOR
  WOOD SIDING FLASHING DETAILS
VENTILATION in buildings

WALL FINISHES INTERIOR
WATER BARRIERS, EXTERIOR BUILDING
WIND ENERGY SYSTEMS
WIND TURBINES & LIGHTNING
WIND WASHING INSULATION At EAVES
WINDOWS & DOORS
WINTERIZE A BUILDING
WOOD Burning Heaters Fireplaces StoveS

ZONE VALVES

More Information

Double wood frame wall details  (C) Daniel Friedman

Double Wall Framing Details
InspectAPedia®  -      

  • Double Wall House Framing Details: wall placement vs. floor joist ends
  • Double wall framing detail for super insulated buildings
  • Solar Age Magazine Articles on Renewable Energy, Energy Savings, Construction Practices
InspectAPedia tolerates no conflicts of interest. We have no relationship with advertisers nor with topics or services discussed at this website.

This article discusses the question of exactly where to locate the outer edge of a wood-framed double wall for super-insulated building construction. Added details discuss structural load capability of an offset wood framed wall, and insulation and vapor barrier placement on a wood framed wall. Sketch at page top and accompanying text are reprinted/adapted/excerpted with permission from Solar Age Magazine - editor Steven Bliss.

Readers interested in building framing for optimum insulation and energy efficiency should also see FRAMING DETAILS for BETTER INSULATION. Contact us to suggest text changes and additions and, if you wish, to receive online listing and credit for that contribution.

© Copyright 2012 InspectAPedia.com, All Rights Reserved. Information Accuracy & Bias Pledge is at below-left. Use page top links to major topics or use links at the left of each page to navigate within topics and documents at this website. Green links show where you are in a document series or at this website.

Double-Wall Houses: Framing Details

  • Double Wall Details: Double Wall House Framing Details Q&A - PDF version, use your browser's back button to return to this page (original article - also see text below)

The text below paraphrases, quotes-from, updates, and comments an original article from Solar Age Magazine and written by Steven Bliss.

Four Detailed Questions & Answers About Double Wall Framing

  1. What is the exact placement of the double wood framed exterior wall with respect to the ends of the floor joists?
  2. How does the offset in a double-wall framed exterior wall affect the load bearing capabilities of the joists?
  3. What thickness foundation wall is used for double-wall wood framed buildings?
  4. What changes are needed to double-wall framed houses when a brick exterior veneer wall is used?

The questions above referred to "Double-Wall Houses," in Solar Age Magazine, December 1982 and were answered the next April. The questions and the detailed answers by Steven Bliss remain current today. Readers should also refer to the wood framed double wall details in the sketch below.

  (C) Daniel Friedman1. In the Hughes double-wall wood frame structure design, the double wall overhangs the floor platform, bringing the outside surface of the exterior wall sheathing in line with the outside of the building's foundation wall below. (See sketch at left.)

The floor framing is set back from the outer edge of the foundation wall by 3 1/2 to 4 inches. The overhanging section of the double wall is supported by short 2x4's (red in the sketch) toenailed between the top of the foundation sill plate and the bottom of the plywood plate (green in the sketch).

Setting the load-bearing (inner wall) back from the band joist (rim joist) a few inches will, in most cases, not affect the sizing (nor load bearing ability) of the joists (and structure).

Hughes uses a treated-wood foundation system, ordinarily framing with 2x6 lumber for one story and 2x8 lumber for two-story construction.

A brick veneer would need to be supported by an additional thickness of foundation, whether the wall itself is wood or masonry. This section of the building foundation is often offset so that the brick wythe veneer can be carried down to or below grade. (Don't forget termite shields where appropriate and don't forget to provide weep openings in the veneer wall).

This double wall framing system allows the air/vapor barrier to run continuously between floors - around band joists and sill plates, reducing building air leakage and simplifying building sealing. The spaces outside the band joists are filled with insulation, keeping the vapor barrier towards the warm side of the insulation.

Here we include solar energy, solar heating, solar hot water, and related building energy efficiency improvement articles reprinted/adapted/excerpted with permission from Solar Age Magazine - editor Steven Bliss.

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ENERGY SAVINGS in buildings

ENVIRONMENTAL HAZARDS - INSPECT, TEST, REMEDY
EXTERIOR WALL SIDING TRIM & FINISHES

FIBERGLASS INSULATION
FIBERGLASS HAZARDS
FIBERGLASS PARTICLE CONTAMINATION TEST
FIBERGLASS INSULATION MOLD

FLOOD DAMAGE ASSESSMENT, SAFETY & CLEANUP
FOOTING & FOUNDATION DRAINS
FOUNDATION CRACKS & DAMAGE GUIDE
FOUNDATION WATERPROOFING
FRENCH DRAINS
FRAMING DETAILS for BETTER INSULATION
FRAMING DETAILS for DOUBLE WALL HOUSES
FRAMING METAL STUD PERFORMANCE
FRAMING MATERIALS, Age, Types
FRAMING METAL STUD PERFORMANCE
FRAMING METHODS, Age, Types
FRAMING SIZE & Spacing, Age, Types
FRAMING TABLES, SPANS for DECKS
FREEZE-PROOF A BUILDING
FROST HEAVES, FOUNDATION, SLAB

GREEN BUILDING CONSTRUCTION CODES GUIDES
GREENHOUSE DESIGN for SOLAR HEATING
GREENHOUSE / SUNSPACE GLARE

HEAT LOSS in BUILDINGS
HEAT LOSS DETECTION TOOLS
HEAT LOSS INDICATORS
HEAT LOSS PREVENTION PRIORITIES
HEAT LOSS R U & K VALUE CALCULATION
HEAT LOSS RATE CALCULATIONS
HOT ROOF DESIGNS: Un-Vented Roof Solutions
HOUSEWRAP INSTALLATION DETAILS
INSULATION INSPECTION & IMPROVEMENT

  • Solar Age Magazine was the official publication of the American Solar Energy Society. The contemporary solar energy magazine associated with the Society is Solar Today. "Established in 1954, the nonprofit American Solar Energy Society (ASES) is the nation's leading association of solar professionals & advocates. Our mission is to inspire an era of energy innovation and speed the transition to a sustainable energy economy. We advance education, research and policy. Leading for more than 50 years. ASES leads national efforts to increase the use of solar energy, energy efficiency and other sustainable technologies in the U.S. We publish the award-winning SOLAR TODAY magazine, organize and present the ASES National Solar Conference and lead the ASES National Solar Tour – the largest grassroots solar event in the world."
  • Steven Bliss served as editorial director and co-publisher of The Journal of Light Construction for 16 years and previously as building technology editor for Progressive Builder and Solar Age magazines. He worked in the building trades as a carpenter and design/build contractor for more than ten years and holds a masters degree from the Harvard Graduate School of Education. Excerpts from his recent book, Best Practices Guide to Residential Construction, Wiley (November 18, 2005) ISBN-10: 0471648361, ISBN-13: 978-0471648369, appear throughout this website, with permission and courtesy of Wiley & Sons. Best Practices Guide is available from the publisher, J. Wiley & Sons, and also at Amazon.com.
    Excerpts with updates and annotations expanding the original Best Practices Guide text can be found in the online review and book summary at BEST CONSTRUCTION PRACTICES GUIDE and also at DECK & PORCH CONSTRUCTION, at INDOOR AIR QUALITY IMPROVEMENT GUIDE, and in other articles found at InspectAPedia.com such as HOUSEWRAP AIR & VAPOR BARRIERS, SOUND CONTROL in buildings, and other topics.

Books & Articles on Building & Environmental Inspection, Testing, Diagnosis, & Repair

  • Our recommended books about building & mechanical systems design, inspection, problem diagnosis, and repair, and about indoor environment and IAQ testing, diagnosis, and cleanup are at the InspectAPedia Bookstore. Also see our Book Reviews - InspectAPedia.
  • Best Practices Guide to Residential Construction, Wiley (November 18, 2005) ISBN-10: 0471648361, ISBN-13: 978-0471648369, appear throughout this website, with permission and courtesy of Wiley & Sons. Best Practices Guide is available from the publisher, J. Wiley & Sons, and also at Amazon.com.
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