InspectAPedia.com InspectAPedia®
Google
InspectAPedia
 

Free Encyclopedia of Building & Environmental Inspection, Testing, Diagnosis, Repair

Ask a Question or Search InspectAPedia

  • HOME
  • AIR CONDITIONING
  • ELECTRICAL
  • EXTERIORS
  • HEATING
  • HOME INSPECTION
  • INTERIORS
  • PLUMBING
  • ROOFING
  • SEPTIC SYSTEMS
  • STRUCTURE
  • WATER SUPPLY
  • ENERGY SAVINGS
  • ENVIRONMENT
  • INDOOR AIR IAQ
  • INSULATION
  • MOLD INSPECT TEST REMOVE
  • NOISE
  • ODORS
  • SOLAR ENERGY
  • VENTILATION
  • EXPERTS DIRECTORY
  • CONTACT US



Mobile Phone/PDA website viewMobile View
Mobile Phone/PDA website viewMobile View
INTERIORS of buildings
ASBESTOS FLOORING HAZARD REDUCTION
ASBESTOS-FREE INSULATION MATERIALS
ASBESTOS IDENTIFICATION IN buildings
ASBESTOS ROOFING / SIDING DUST
ASBESTOS PHOTO GUIDE to Materials
ATTIC LEAKS, CONDENSATION & MOLD

BASEMENT CEILING VAPOR BARRIER
BASEMENT HEAT LOSS
BASEMENT LEAKS, INSPECT FOR
BASEMENT WATERPROOFING
BATH & KITCHEN DESIGN GUIDE
BATHROOM VENTILATION
BEST CONSTRUCTION PRACTICES GUIDE
Best Interior Finish Practices
BLOWER DOORS & AIR INFILTRATION
BUCKLED FOUNDATIONS due to INSULATION?
BUILDING SAFETY HAZARDS GUIDE
DEW POINT CALCULATION for WALLS
DEW POINT TABLE - CONDENSATION POINT GUIDE
DOORS, INTERIOR
DRYWALL HAZARDS, CHINESE
DRYWALL INSTALLATION Best Practices
DRYWALL MOLD
DRYWALL MOLD RESISTANT

EARTHQUAKE DAMAGED FOUNDATIONS
EFFLORESCENCE, Salts & White / Brown Deposits
ELDERLY & VETERANS HOME SAFETY
ELECTRICAL INSPECTION, DIAGNOSIS, REPAIR
ENERGY SAVINGS in buildings

HOUSEWRAP AIR & VAPOR BARRIERS
HOUSE DOCTOR, how-to be
HUMIDITY LEVEL TARGET
INSULATION IDENTIFICATION GUIDE
INSULATION INSPECTION & IMPROVEMENT
  Air Bypass Leaks, Thermal Tracking
  AIR LEAK DETECTION TOOLS
  AIR LEAK MINIMIZATION
  AIR SEAL STRATEGIES
  ASBESTOS IDENTIFICATION IN buildings
  ATTIC CONDENSATION CAUSE & CURE
  BASEMENT CEILING VAPOR BARRIER
  BASEMENT De-Watering Systems
  BASEMENT HEAT LOSS
  Blocked Soffit Intake Vents
  BLOWER DOORS & AIR INFILTRATION
  BLOWN-IN INSULATION
  BRICK or BLOCK WALL CAVITY INSULATION
  BRICK VENEER WALL INSULATION
  BUCKLED FOUNDATIONS due to INSULATION?
  CASEWORK, CABINETS, SHELVING INSTALLATION
  CATHEDRAL CEILING INSULATION
  CATHEDRAL CEILING VENTILATION
  HOT ROOF DESIGNS: Un-Vented Roof Solutions
  ENERGY SAVINGS in buildings
  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
  HEATING COST SAVINGS METHODS
  HIGH MASS TRADEOFFS, HEATING vs COOLING
  HOUSE DOCTOR, how-to be
  TIMERS for ELECTRIC WATER HEATERS
  FIBERGLASS DUCT, RIGID CONSTRUCTION
  FIRE PROTECTION FOR FOAM BOARD INSULATION
  FOUNDATION INSULATION OPTIONS
  FRAMING DETAILS for BETTER INSULATION
  FRAMING DETAILS for DOUBLE WALL HOUSES
  FRAMING METAL STUD PERFORMANCE
  Inspect Attics for Moisture or Mold
  Inspect Attics for Blocked Soffit Intake Vents
  Inspect Basements for Moisture or Mold
  Inspect Building Exterior - Roof Venting
  Inspect the Ridge Vent System from the Attic
  Inspect the Soffit Vent System from the Attic
  Insects & Foam Insulation
  HOUSE DOCTOR, how-to be
  Insulation Air & Heat Leaks
  INSULATION for GREENHOUSE or SOLARIUM
  INSULATION CHOICES
  INSULATION FACT SHEET- DOE
  INSULATION PLACEMENT in buildings
  INSULATION R-Values & Properties
  LOG HOME WALL INSULATION VALUES
  MOISTURE in BUILDING WALLS, EFFECTS
  MOISTURE in CELLULOSE INSULATION
  Mold in Fiberglass Insulation
  Mold on Books, Book Conservation
  Mold on Fiberboard Insulating Sheathing
  MOLD in Foam Insulation
  MOLD in INSULATION
  Mold Resistance of Foam Insulation
  MOLD PREVENTION AFTER FLOODING
  MOLD RESISTANT CONSTRUCTION
  PASCAL CALCULATIONS
  PHENOLIC FOAM INSULATION
  PHOTOVOLTAIC POWER SYSTEMS
  POLYCARBONATE GLAZING
  POLYISOCYANURATE FOAM INSULATION
  POLYISOCYANURATE FOAM BELOW SLABS
  POLYSTYRENE FOAM INSULATION
  RADIANT BARRIERS
  REFLECTIVE INSULATION
  RIGID FOAM USE INDOORS
  ROOF VENTING ENERGY SAVING DETAILS
  ROOF VENTING NEEDED?
  ROOF VENTILATION SPECIFICATIONS
  REMOTE ELECTRIC POWER, PHOTOVOLTAIC
  ROCK-BED SOLAR HEAT STORAGE DESIGN
  SLAB INSULATION, PASSIVE SOLAR
  SLATE THERMAL MASS for SOLAR HEAT STORAGE
  SOUND CONTROL in buildings
  STRESS SKIN INSULATED PANELS
  STUCCO OVER FOAM INSULATION
  SUPER HI-R INSULATION
  SUPERINSULATION RETROFIT
  Urea Formaldehyde Foam Insulation UFFI
  URETHANE FOAM Deterioration, Outgassing
  VAPOR BARRIERS & AIR SEALING at BAND JOISTS
  VAPOR BARRIERS & CONDENSATION in buildings
  VAPOR BARRIERS & HOUSEWRAP
  VAPOR CONDENSATION & BUILDING SHEATHING
  VERMICULITE INSULATION
INSULATION LOCATION - WHERE TO PUT IT
INSULATION MOLD
INSULATION R-Values & Properties

KIT HOMES, Aladdin, Sears, Wards, Others

LEAD POISONING HAZARDS GUIDE
LEED GREEN BUILDING CERTIFICATION
LOG HOME ENERGY EFFICIENCY
LOG HOME GUIDE
INTERIORS of buildings
MOISTURE CONTROL in BUILDINGS
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
ODOR DIAGNOSIS CHECKLIST

PASCAL CALCULATIONS

RADIANT BARRIERS
RADIANT HEAT
RADIANT HEAT Floor Mistakes to Avoid
RADIANT HEAT TEMPERATURES
RADIANT SLAB FLOORING CHOICES
RADIANT SLAB TUBING & FLUID CHOICES
ROT, FUNGUS, TERMITES
ROT, TIMBER FRAME

SOLAR ENERGY SYSTEMS
SOUND CONTROL in buildings
STAIN DIAGNOSIS on BUILDING INTERIORS

THERMAL MASS in buildings
THERMAL TRACKING & HEAT LOSS
TRIM, INTERIOR INSTALLATION

VAPOR BARRIERS & CONDENSATION in BUILDINGS
VENTILATION in buildings
VINYL Siding or PLASTIC Window ODORS in buildings
VINYL CHLORIDE HEALTH INFO

WATER BARRIERS, EXTERIOR BUILDING
WATER ENTRY in buildings
WIND ENERGY SYSTEMS
WIND TURBINES & LIGHTNING
WIND WASHING INSULATION At EAVES
WINDOWS & DOORS
WINTERIZE A BUILDING
WOOD Burning Heaters Fireplaces Stoves

More Information

Polystyrene insulating foam board (C) Daniel FriedmanFire Protection Requirements for Foam Board Building Insulation
InspectAPedia®  -      

  • Foam board insulation fire barrier requirements
  • Exposed foam board insulation in an occupied space: fire code issues
  • Drywall required to cover foam insulating board used indoors
  • Using foam insulating board for a building insulation retrofit by gluing to existing gypsum board wall surfaces
  • Questions & answers about exposed foam board building insulation & fire safety requirements

Exposed foam board insulation fire hazards: this Q&A article discusses the requirement for a fire-resistant covering for foam and foam-board board building insulation. Also see Foam Board Insulation, POLYSTYRENE FOAM INSULATION, and BUILDING SAFETY HAZARDS GUIDE.

InspectAPedia tolerates no conflicts of interest. We have no relationship with advertisers nor with topics or services discussed at this website.

© 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.

Fire Safety and Foam Insulation Board

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

What coverings are acceptable for foam insulation used indoors?

Question:

Mineral wool insulation in an atticI am reinsulating a house that has concrete block walls, a stucco exterior, and 3/4-inch foil-backed gypsum board over furring strips on the building interior.

If I glued foam insulating board directly over the existing plaster wall finish, would paneling be sufficient covering? Will the foil backing on the gypsum board create a cold-side vapor barrier? - Gordon Reed Jr., Kingsford MI.

In the photograph at left, foam insulating board is shown on a garage ceiling below a second floor bedroom - this material should have been covered with fire rated drywall to meet local building code specifications for fire safety.

Answer: Fire Code Requirements for Covering Foam Insulating Board

Since most fire codes call for a minimum of half-hour fire rating over foam insulations, paneling would probably not provide a sufficient fire barrier over the foam insulating board. New 1/2-inch drywall is usually called for [and in some installations, fire-rated drywall or thicker drywall may be required for local codes and for certain applications].

The thin foil used on the back of drywall will create a moderate cold-side vapor retarder, but the exact permenance is not published for foil-backed gypsum board.

The safe tack is to use a highgraade air/vapor barrier on the inside, keeping it much less permeable than the cold side barrier. We suggest foil-faced foam insulating board with the joints sealed with foil tape.

Watch out: depending on whether or not the foil backing on the existing foil-backed gypsum board is perforated or not, the perm rating of that surface could be near zero - that is, very resistant to moisture movement, forming a moisture barrier in the "wrong place".

So it would also be a good idea to take measures to keep interior building moisture levels to a moderate level. See HUMIDITY LEVEL TARGET

solid foam insulating  board

Background on foam board insulation and fire protection:

Foam insulation board should not be left exposed in building interiors.

While many modern foam insulating products do not themselves readily support combustion (that is they don't catch fire and burn alone) they may give off thick acrid or toxic black smoke in a fire, making it difficult to safely exit the burning building.

 

Foam Insulation Alternatives to Solid Foam Board Insulation

Various foam insulation products that are sprayed in buildings, including UFFI, Icynene, Latex, and other insulating foams as well as fire resistant spray foam insulation used for sealing building penetrations, a different product from the foam board insulation discussed here, are described at INSULATION IDENTIFICATION GUIDE and at Foam Insulation Types - Visual Id.

Original article

The link to the original Q&A article in PDF form immediately below is preceded by an expanded/updated online version of this article.

  • Q&A on Covering Indoor Foam Insulation - PDF version, use your browser's back button to return to this page. Original article, Solar Age Magazine, September 1985, adapted and updated for InspectAPedia.com November 2010.

Questions & Answers regarding this article

Questions & answers about exposed foam board building insulation & fire safety requirements.

Ask a Question or Search InspectAPedia

HTML Comment Box is loading comments...

Recommend / Share this Article            

...

Technical Reviewers & References

  • InspectAPedia.com® - Daniel Friedman - Publisher & Editor.
  • InspectAPedia Bookstore lists recommended books, organized by topic & available for purchase. Most of our articles also include a list of recommended books for the specific article topic as well as other references, and information sources.
  • Critique, contributions wanted: Contact Us to suggest corrections or additions to articles at this website, and if you wish, to receive online listing and credit as a contributor. Particular thanks are due to the many experts and also consumers who read and critique technical articles at InspectAPedia.com.
  • Additional technical contributors & reference sources for this article are listed below.

Use links just below or at the left of each page to navigate this document or to view other topics at this website. Green links show where you are in our document or website.

  FIRE PROTECTION FOR FOAM BOARD INSULATION

  • 3/07: thanks to Gary Randolph, Ounce of Prevention Home Inspection, LLC Buffalo, NY, for attentive reading and editing suggestions. Mr. Randolph can be reached in Buffalo, NY, at (716) 636-3865 or email: gary@ouncehome.com
  • 06/07: thanks for photographs of transite asbestos heating ducts, courtesy of Thomas Hauswirth, Managing Member of Beacon Fine Home Inspections, LLC and (in 2007) Vice President, Connecticut Association of Home Inspectors Ph. 860-526-3355 Fax 860-526-2942 beaconinspections@sbcglobal.net

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.
  • Home Reference Book - Carson Dunlop The Home Reference Book - the Encyclopedia of Homes, Carson Dunlop & Associates, Toronto, Ontario, 2010, $69.00 U.S., is available from Carson Dunlop. The Home Reference Book is a bound volume of more than 450 illustrated pages that assist home inspectors and home owners in the inspection and detection of problems on buildings. The text is intended as a reference guide to help building owners operate and maintain their home effectively. InspectAPedia.com ® author/editor Daniel Friedman is a contributing author. Field inspection worksheets are included at the back of the volume.
  • Building Research Council, BRC, nee Small Homes Council, SHC, School of Architecture, University of Illinois at Urbana-Champaign, brc.arch.uiuc.edu. "The Small Homes Council (our original name) was organized in 1944 during the war at the request of the President of the University of Illinois to consider the role of the university in meeting the demand for housing in the United States. Soldiers would be coming home after the war and would be needing good low-cost housing. ...  In 1993, the Council became part of the School of Architecture, and since then has been known as the School of Architecture-Building Research Council. ... The Council's researchers answered many critical questions that would affect the quality of the nation's housing stock.
    • How could homes be designed and built more efficiently?
    • What kinds of construction and production techniques worked well and which did not?
    • How did people use different kinds of spaces in their homes?
    • What roles did community planning, zoning, and interior design play in how neighborhoods worked
  • "An Example of Colonial Paneling", Norman Morrison Isham, The Metropolitan Museum of Art Bulletin, Vol. 6, No. 5 (May, 1911), pp. 112-116, available by JSTOR.
  • "Energy Savers: Whole-House Supply Ventilation Systems [copy on file as /interiors/Energy_Savers_Whole-House_Supply_Vent.pdf ] - ", U.S. Department of Energy energysavers.gov/your_home/insulation_airsealing/index.cfm/mytopic=11880?print
  • "Energy Savers: Whole-House Exhaust Ventilation Systems [copy on file as /interiors/Energy_Savers_Whole-House_Exhaust.pdf ] - ", U.S. Department of Energy energysavers.gov/your_home/insulation_airsealing/index.cfm/mytopic=11870
  • "Energy Savers: Ventilation [copy on file as /interiors/Energy_Savers_Ventilation.pdf ] - ", U.S. Department of Energy
  • "Energy Savers: Natural Ventilation [copy on file as /interiors/Energy_Savers_Natural_Ventilation.pdf ] - ", U.S. Department of Energy
  • "Energy Savers: Energy Recovery Ventilation Systems [copy on file as /interiors/Energy_Savers_Energy_Recovery_Venting.pdf ] - ", U.S. Department of Energy energysavers.gov/your_home/insulation_airsealing/index.cfm/mytopic=11900
  • "Energy Savers: Detecting Air Leaks [copy on file as /interiors/Energy_Savers_Detect_Air_Leaks.pdf ] - ", U.S. Department of Energy
  • "Energy Savers: Air Sealing [copy on file as /interiors/Energy_Savers_Air_Sealing_1.pdf ] - ", U.S. Department of Energy
  • ...

Home About Us Accuracy Contact Us Content Use Policy Printing Tips Privacy Website Description © 2012 Copyright InspectAPedia.com