InspectAPedia ®

Building & Environmental Inspection, Testing, Diagnosis, Repair, & Problem Prevention Advice
Home | Air
Conditioning
| Electrical
-
Energy Saving
| Environment
Indoor
| Exteriors | Heating | Home
Inspection
| Insulate
-
Ventilate
| Interiors | Mold
Inspect/Test
| Plumbing
Water
Septic
| Roofing | Solar
Energy
| Structure | Contact Us
Directory of Professionals to Inspect or Test a Building


Mobile Phone/PDA website viewMobile View
INSULATION INSPECTION & IMPROVEMENT
AIR BYPASS LEAKS
AIR LEAK DETECTION TOOLS
AIR LEAK MINIMIZATION
AIR SEALING STRATEGIES
ASBESTOS IDENTIFICATION IN BUILDINGS
ATTIC LEAKS, CONDENSATION & ATTIC MOLD
BASEMENT WATERPROOFING
BATHROOM VENTILATION
BASEMENT LEAKS Moisture or Mold
BASEMENT HEAT LOSS
BLOWER DOORS & AIR INFILTRATION
BRICK LINED WALLS
BUCKLED FOUNDATIONS due to INSULATION?
BUILDING NOISE DIAGNOSIS & CURE
CATHEDRAL CEILING INSULATION
CRAWL SPACES
  Crawl Space Dryout Procedures
  CRAWL SPACE GROUND COVERS
  Crawl Space Safety Advice
  Crawlspace Mold Advice
  MOLD CLEANUP by MEDIA BLASTING
  Mold on Dirt Floors
DEW POINT CALCULATION for WALLS
DEW POINT TABLE - CONDENSATION POINT GUIDE
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 USE MONITORING
ENVIRONMENTAL HAZARDS
FIBERGLASS INSULATION
FIBERGLASS HAZARDS
FIBERGLASS CONTAMINATION TEST PROCEDURE
FIBERGLASS MOLD
FRAMING DETAILS for BETTER INSULATION
FRAMING DETAILS for DOUBLE WALL HOUSES
FREEZE-PROOF A BUILDING
HEAT LOSS CALCULATIONS
HEAT LOSS in BUILDINGS
HEAT LOSS DETECTION TOOLS
HEAT LOSS INDICATORS
HEAT LOSS PREVENTION PRIORITIES
HEAT LOSS R U & K VALUE CALCULATION
HOUSEWRAP AIR & VAPOR BARRIERS
HOUSEWRAP - TYVEK INSTALLATION DETAILS
HUMIDITY LEVEL TARGET
ICE DAM PREVENTION
INDOOR AIR QUALITY & HOUSE TIGHTNESS
INSULATION INSPECTION & IMPROVEMENT
INSULATION CHOICES
INSULATION FACT SHEET- DOE
INSULATION IDENTIFICATION GUIDE
INSULATION LOCATION in BUILDINGS - WHERE TO INSULATE
  INSULATION LOCATION & QUANTITY for ATTICS
  INSULATION LOCATION for BASEMENT FLOORS
  INSULATION LOCATION for BASEMENT WALLS
  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 for SOUND CONTROL in BUILDINGS
  INSULATION LOCATION for SWIMMING, INDOOR
INSULATION MOLD
INSULATION R-Values & Properties
LOG HOME WALL INSULATION VALUES
INTERIORS of BUILDINGS
MOISTURE CONTROL in BUILDINGS
  ATTIC CONDENSATION CAUSE & CURE
  Attic Moisture or Mold Sources
  BASEMENT HEAT LOSS
  BASEMENT LEAKS Moisture or Mold
  Chimney Leaks
  CRAWL SPACE Dryout Procedures
  DEW POINT CALCULATION for WALLS
  DEW POINT TABLE - CONDENSATION POINT GUIDE
  EFFLORESCENCE, Salts & White / Brown Deposits
  FLOOD Damage Assessment & Repairs
  FLOOD DAMAGED FOUNDATIONS
  FLOOD VENTS & FLOOD PORTS
  FLOODS IN BUILDINGS-priorities
  FOUNDATION WATERPROOFING
  HUMIDITY CONTROL & TARGETS INDOORS
  HOUSEWRAP AIR & VAPOR BARRIERS
  LOG HOME Leak Diagnosis & Cure
  LOG HOME Condensation &Moisture
  MOISTURE CALCULATIONS
  MOISTURE PROBLEMS: CAUSE & CURE
  MOLD in BUILDINGS
  ROOF VENTILATION SPECIFICATIONS
  Soffit Intake Vents & Attic Condensation
  WATER ENTRY in BUILDINGS
  Whole House Ventilation Strategies
MOLD INFORMATION CENTER
MVOCs & MOLDY MUSTY ODORS
MYCOTOXIN EFFECTS of MOLD EXPOSURE
NOISE / SOUND DIAGNOSIS & CURE
ODOR DIAGNOSIS CHECKLIST
ODORS & SMELLS DIAGNOSIS & CURE
PASCAL CALCULATIONS
ROT, FUNGUS, TERMITES
  TERMITE SHIELDS vs TERMITICIDE
ROT, TIMBER FRAME
SOLAR ENERGY SYSTEMS
SOUND CONTROL in BUILDINGS
STAIN DIAGNOSIS
THERMAL MASS in BUILDINGS
  THERMAL MASS FLOOR SLABS
  THERMAL MASS in UPSTAIRS
  THERMAL MASS WALL DESIGN
THERMAL TRACKING & HEAT LOSS
  Ceiling Thermal Tracking Marks
  Wall Thermal Tracking Stains
  Floor Carpet Thermal Tracking Stains
  Air Bypass Leaks Marks on Insulation
  Thermal Tracking to Diagnose IAQ
  Stains HVAC Supply Registers
  Pet Stains on Floors
  Pet Stains on Walls
  Human Occupant Stains on Walls
  Stains from Candles, Woodstoves, Fireplaces
  Other Stains on Indoor Walls & Ceilings
  What to Do About Thermal Tracking
VAPOR BARRIERS & AIR SEALING at BAND JOISTS
VAPOR BARRIERS & CONDENSATION in BUILDINGS
VAPOR BARRIERS & HOUSEWRAP
VAPOR CONDENSATION & BUILDING SHEATHING
VENTILATION in BUILDINGS
  Air Bypass Leaks, Thermal Tracking
  ATTIC CONDENSATION CAUSE & CURE
  BATHROOM VENTILATION
  Blocked Soffit Intake Vents
  BRICK VENEER WALL INSULATION
  CATHEDRAL CEILING INSULATION
  CATHEDRAL CEILING VENTILATION
  CRAWL SPACE VENTING & Dryout Procedures
  BLOWER DOORS & AIR INFILTRATION
  HEAT LOSS: How to Calculate Heat Loss in a Building
  HOUSEWRAP AIR & VAPOR BARRIERS
  HUMIDITY LEVEL TARGET
  ICE DAM PREVENTION
  MOISTURE CONTROL in BUILDINGS
  Crawl Space Ventilation
  MOISTURE CALCULATIONS
  MOISTURE PROBLEMS: CAUSE & CURE
  ROOF VENTILATION SPECIFICATIONS
  ROOF VENTING ENERGY SAVING DETAILS
  ROOF VENTING NEEDED?
  Soffit Ventilation
VENTILATION in BUILDINGS
WATER ENTRY in BUILDINGS
  ATTIC LEAKS Moisture or Mold
  BASEMENT De-Watering Systems
  BASEMENT HEAT LOSS
  INSULATION for GREENHOUSE or SOLARIUM
  INSULATION CHOICES
  BASEMENT LEAKS Moisture or Mold
  BASEMENT WATERPROOFING
  Chimney Leaks
  CRAWL SPACE Dryout Procedures
  DEW POINT CALCULATION for WALLS
  DEW POINT TABLE - CONDENSATION POINT GUIDE
  EFFLORESCENCE, Salts & White / Brown Deposits
  FLOOD Damage Assessment & Repairs
  FLOOD DAMAGED FOUNDATIONS
  FLOOD VENTS & FLOOD PORTS
  FLOODS IN BUILDINGS-priorities
  FOUNDATION WATERPROOFING
  HUMIDITY CONTROL & TARGETS INDOORS
  HOUSEWRAP AIR & VAPOR BARRIERS
  LOG HOME Leak Diagnosis & Cure
  LOG HOME Condensation &Moisture
  MOISTURE CALCULATIONS
  MOISTURE PROBLEMS: CAUSE & CURE
  MOLD in BUILDINGS
  SEWAGE CONTAMINATION
  SUMP PUMPS GUIDE
  WATER ENTRY in BUILDINGS
WIND TURBINES
WINDOWS & DOORS
  SKYLIGHT LEAK DIAGNOSIS & REPAIR
  SITE BUILT DOUBLE GLAZED WINDOWS
  SLOPED GLAZING DETAILS
  SUNGAIN, FILMS, LOW-E GLASS
  VERTICAL GLAZING DETAILS
  WINDOW / DOOR ENERGY EFFICIENT, DOE
  WINDOW LEAKS INTO BASEMENT
WINTERIZE A BUILDING

More Information

InspectAPedia.comInspectAPedia ® Home & Site Map
InspectAPedia Blog - News Updates
Air Conditioning & Heat Pumps
Bookstore
Electrical
Environment
Exteriors
Heating
Home Inspection
Insulate Ventilate
Interiors
Mold Inspect/Test
Plumbing Water Septic
Roofing
Structure
Accuracy & Privacy Policies
Contact Us



Condensation at a basement window (C) Daniel Friedman

Table of Dew Point Data for Building Condensation
InspectAPedia®  -    

  • How to find the dew point in building cavities
  • How to determine the dew point on building surfaces
  • What is the dew point ?
  • Poor Construction Details Can Lead to Dangerous or Costly Rot to Timber Frame and other Wood Structures
Our site offers impartial, unbiased advice without conflicts of interest. We will block advertisements which we discover or readers inform us are associated with bad business practices, false-advertising, or junk science. our contact info is at InspectAPedia.com/appointment.htm.

Here we explain how the dew point, the point at which moisture condenses out of air onto a surface, is obtained for a building cavity or building surface. This article includes excerpts or adaptations from "A Rotting Timber Frame", by Steven Bliss, adapted by permission, courtesy of the Journal of Light Construction.

Readers should review DEW POINT CALCULATION for WALLS for a bit more theory on calculating the point in walls at which moisture will condense. Also see MOISTURE PROBLEMS: CAUSE & CURE and HOUSEWRAP AIR & VAPOR BARRIERS and HUMIDITY CONTROL TO PREVENT MOLD also VENTILATION in BUILDINGS. Our page top photo shows severe moisture condensation on a basement window and window frame.

© Copyright 2010 Daniel Friedman, Steve Bliss, Wiley & Sons, All Rights Reserved. Information Accuracy & Bias Pledge is at below-left. Use links 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.

How to Find the Dew Point for Any Temperature & Relative Humidity in a Building

Insulating foam sheathing is becoming fairly common in cold climates. But in most cases, it violates the rule of thumb that the exterior of a building should be five to ten times more permeable than the interior. This is particularly true with foil-faced sheathings.

Some people argue that it’s all right to use insulating sheathing, because it warms up the wall cavity enough to prevent condensation problems. This is supported by tests (based on 40 percent relative humidity indoors) done at the U.S. Forest Products Laboratory in Madison, Wisc.

Dew Point Table (C) Journal of Light Construction, Steven Bliss

As shown in our illustration above, To find the dew point for any temperature and relative humidity: Start with the temperature, move up to the current relative-humidity line. Move left to the saturation curve, and down to find the dew point, as shown.

How can you gauge this for yourself? First, you need to calculate the dew point of the interior air during the winter. To be conservative, assume an indoor relative humidity of 50 percent at 70°F. That gives you a dew point of about 50°F, according to the chart at above left.

Next, calculate how cold it must be outside before the inside surface of the sheathing will fall below the dew point. The inside surface of the sheathing is where condensation is most likely to occur.

You can calculate the temperature at any point in the wall if you know the total R-value inside and outside that point. The temperature rise through the wall and the R-values are in direct proportion.

For example, in Wall A, when it’s 32°F outside, the temperature at the sheathing surface is 7/18 of the way from 32 to 70, or 47°F, which is below the dew point of the interior air. In Wall B, with two inches of foam, the temperature at the sheathing surface is 53°F — safely above the dew point.

Since the average winter temperature in most of central and northern New England is at or below 32°F, Wall A appears risky unless you use one of the more permeable rigid insulations (headboard or rigid fiberglass), or have a perfect air/vapor barrier. That’s not a bet you should make.

How to Read a Psychometric Chart to Find the Building Surface Dew Point

Several detailed psychrometric charts useful for determining the dew point are shown and linked-to just below. There moisture is expressed in vapor pressure in mmHg (millimeters of mercury). The curved relative-humidity lines intersect with the diagonal lines to show the dew point for various temperatures and levels of relative humidity.

Psychometric chart Dry bulb (Tdb) temperature (chart bottom or "x" axis) is just the measured indoor temperature measured using a standard thermometer.

Relative humidity (RH) is the amount of water in the air. We use the term "relative" humidity because the amount of water that a given volume of air can hold decreases as temperatures drop. (Think of it as cold air being more dense, squeezing water molecules out of suspension in the air.) So RH is the ratio of the actual water vapor pressure in the air to the water vapor pressure in air that is fully saturated (can't hold any more water) at that same temperature.

Wet bulb temperature (Twb) measures the amount of water that can be taken out of the air (by evaporation) - the old "sling psychrometer" used a simple mercury thermometer with a wet cloth over the sensing bulb to measure Twb by swinging the thermometer around at the end of a string - or properly: a sling psychrometer. Really.

See the left-most curve, the 100% relative humidity line for a simple case - that's air that is 100% saturated. So on the chart below, notice that on the left-most curve, the wet bulb temperature equals the dry bulb temperature - that is, when the air is fully saturated at 100% RH, no more air water can be evaporated out of the air.

Define Dew Point: Now the good part: the dew point (Tdp) is the temperature at which water vapor just starts to condense out of air that is cooling - for example when warm moisture-laden air contacts a cool surface inside of a wall cavity. Above the dew point the moisture stays in the air. At or below the dew point moisture leaves the air and in buildings, condenses on the cooler surface that the air is contacting. This also means that if you are measuring the relative humidity in a room, the RH number only has meaning if you measure the room temperature at the same time and location.

That's why, for example, when measuring basement humidity we will get different RH measurements in the center of the room than we will find right against a cool foundation wall - we discuss this in more detail at HUMIDITY LEVEL TARGET.

Dew Point Example: in the chart below, if the room temperature (Tdb) is 43 degC and the relative humidity (RH) is 20% (the curved line reading up from 43 degC) then the dew point is 15 degC (reading horizontally across to the left-most curved line and noting the dew point temperature scale set along that curve).

Dew Point Example 2: in the psychrometric chart given below, read up from 50 degC dry bulb temperature to the 20% RH curve, then follow the horizontal line from that point to the left to the outermost curve on the chart. If you don't go blind following this chart (click to enlarge it) you'll see that the Dew Point (Tdp) and also the wet bulb temperature (Twb) at the end of that line is 21 degC. Lots of variations of psychometric charts are available; they will all work about like this.

To convert temperatures from Fahrenheit to Celsius use: Tc = (5/9)*(Tf-32) where Tc= the Celsius temperature and Tf= the Fahrenheit temperature.

A nicely detailed free psychrometric chart is provided by Linric who also provide professional psychrometric software and other tools. A simple chart and additional explanation of moisture, mold, and the dew point can be seen in this NIOSH psychometric chart article.

-- Adapted with permission, from material by Steven Bliss and appearing originally in the February 1987 issue of The Journal of Light Construction

Share this Article      

...

Technical Reviewers & References

  • InspectAPedia.com® - Daniel Friedman
  • 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.
  • 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.

AIR SEALING STRATEGIES
DEW POINT CALCULATION for WALLS
DEW POINT TABLE - CONDENSATION POINT GUIDE
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

HOUSEWRAP AIR & VAPOR BARRIERS
HOUSEWRAP - TYVEK INSTALLATION DETAILS
HUMIDITY LEVEL TARGET

INSULATION INSPECTION & IMPROVEMENT
MOISTURE CONTROL in BUILDINGS
MOISTURE PROBLEMS: CAUSE & CURE
PAINT FALURE, DIAGNOSIS, CURE, PREVENTION
VAPOR BARRIERS & AIR SEALING at BAND JOISTS
VAPOR BARRIERS & CONDENSATION in BUILDINGS
VAPOR BARRIERS & HOUSEWRAP
VAPOR CONDENSATION & BUILDING SHEATHING
VENTILATION in BUILDINGS

...

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

  • Our recommended books about building design, inspection, and repair, and about indoor environment testing, diagnosis, and cleanup are at the InspectAPedia Bookstore.
  • A Rotting Timber Frame, Steven Bliss, Journal of Light Construction, February 1987.
  • The Journal of Light Construction has generously given reprint permission to InspectAPedia.com for this article. All rights and contents are ©Journal of Light Construction and may not be reproduced in any form.
  • "Moisture Problems: Causes and Cures. Understanding moisture problems can steer you free of trouble", Steve Bliss: Building it Right, Solar Age, March 1983 p. 37, 38. -- Adapted with permission, from original material to form this web page article.
  • ASHRAE resource on dew point and wall condensation - see the ASHRAE Fundamentals Handbook, available in many libraries. The following three ASHRAE Handbooks are also available at the InspectAPedia bookstore in the third page of our Insulate-Ventilate section:
    • 2005 ASHRAE Handbook : Fundamentals : Inch-Pound Edition (2005 ASHRAE HANDBOOK : Fundamentals : I-P Edition) (Hardcover), Thomas H. Kuehn (Contributor), R. J. Couvillion (Contributor), John W. Coleman (Contributor), Narasipur Suryanarayana (Contributor), Zahid Ayub (Contributor), Robert Parsons (Author), ISBN-10: 1931862702 or ISBN-13: 978-1931862707
    • 2004 ASHRAE Handbook : Heating, Ventilating, and Air-Conditioning: Systems and Equipment : Inch-Pound Edition (2004 ASHRAE Handbook : HVAC Systems and Equipment : I-P Edition) (Hardcover)
      by American Society of Heating, ISBN-10: 1931862478 or ISBN-13: 978-1931862479
      "2004 ASHRAE Handbook - HVAC Systems and Equipment The 2004 ASHRAE HandbookHVAC Systems and Equipment discusses various common systems and the equipment (components or assemblies) that comprise them, and describes features and differences. This information helps system designers and operators in selecting and using equipment. Major sections include Air-Conditioning and Heating Systems (chapters on system analysis and selection, air distribution, in-room terminal systems, centralized and decentralized systems, heat pumps, panel heating and cooling, cogeneration and engine-driven systems, heat recovery, steam and hydronic systems, district systems, small forced-air systems, infrared radiant heating, and water heating); Air-Handling Equipment (chapters on duct construction, air distribution, fans, coils, evaporative air-coolers, humidifiers, mechanical and desiccant dehumidification, air cleaners, industrial gas cleaning and air pollution control); Heating Equipment (chapters on automatic fuel-burning equipment, boilers, furnaces, in-space heaters, chimneys and flue vent systems, unit heaters, makeup air units, radiators, and solar equipment); General Components (chapters on compressors, condensers, cooling towers, liquid coolers, liquid-chilling systems, centrifugal pumps, motors and drives, pipes and fittings, valves, heat exchangers, and energy recovery equipment); and Unitary Equipment (chapters on air conditioners and heat pumps, room air conditioners and packaged terminal equipment, and a new chapter on mechanical dehumidifiers and heat pipes)."
    • 1996 Ashrae Handbook Heating, Ventilating, and Air-Conditioning Systems and Equipment: Inch-Pound Edition (Hardcover), ISBN-10: 1883413346 or ISBN-13: 978-1883413347 ,
      "The 1996 HVAC Systems and Equipment Handbook is the result of ASHRAE's continuing effort to update, expand and reorganize the Handbook Series. Over a third of the book has been revised and augmented with new chapters on hydronic heating and cooling systems design; fans; unit ventilator; unit heaters; and makeup air units. Extensive changes have been added to chapters on panel heating and cooling; cogeneration systems and engine and turbine drives; applied heat pump and heat recovery systems; humidifiers; desiccant dehumidification and pressure drying equipment, air-heating coils; chimney, gas vent, fireplace systems; cooling towers; centrifugal pumps; and air-to-air energy recovery. Separate I-P and SI editions."
    • Principles of Heating, Ventilating, And Air Conditioning: A textbook with Design Data Based on 2005 AShrae Handbook - Fundamentals (Hardcover), Harry J., Jr. Sauer (Author), Ronald H. Howell, ISBN-10: 1931862923 or ISBN-13: 978-1931862929
    • 1993 ASHRAE Handbook Fundamentals (Hardcover), ISBN-10: 0910110964 or ISBN-13: 978-0910110969
  • The National Institute of Standards and Technology, NIST (nee National Bureau of Standards NBS) is a US government agency - see www.nist.gov
  • Understanding Ventilation: How to Design, Select, and Install Residential Ventilation Systems, John Bower
  • Linric psychrometric tools can be found at www.linric.com
  • "Weather-Resistive Barriers", how to select and install housewrap and other types of weather resistive barriers, U.S. DOE
  • ...
INSULATION INSPECTION & IMPROVEMENT

More Information

InspectAPedia.comInspectAPedia ® Home & Site Map
InspectAPedia Blog - News Updates
Air Conditioning & Heat Pumps
Bookstore
Electrical
Environment
Exteriors
Heating
Home Inspection
Insulate Ventilate
Interiors
Mold Inspect/Test
Plumbing Water Septic
Roofing
Structure
Accuracy & Privacy Policies
Contact Us

More Information on Building Diagnostic Inspections and Repairs

    ...
InspectAPedia.comInspectAPedia® Home & Site Map - Building & Environmental Inspection, Testing, Diagnosis, Repair, & Problem Prevention Advice: In-depth research & advice on diagnosing, testing, correcting, & preventing building defects & indoor environmental hazards. Unbiased information, no conflicts of interest.
GO TO the MOLD and INDOOR ENVIRONMENT INFORMATION CENTER for in-depth advice on avoiding testing for or cleaning up mold and other indoor environmental hazards, odors, gases, contaminants
The Mold Information Center:
What to Do About Mold in Buildings, When and How to Inspect for Mold, Clean Up Mold, or Avoid Mold Problems
GO TO MOLD TEST KITS: This expert-recommended mold test kit is cheap and yet top performing *IF* you use a competent analysis laboratory!
Use this simple, economical mold test kit
by following our instructions on how to collect and mail mold samples to our lab
GO TO IAQ/MOLD-TEST LAB SERVICES: Mold, Pollen, indoor air quality, field and laboratory services by an expert.Environmental Inspection, Testing, & Diagnosis On-Site IAQ, Gas, Air Testing, Mold Investigation, Sick Building Diagnosis, Lab Services, & Remediation Plan Preparation - indoor air quality testing, problem source determination, supporting lab work, written remediation plan addressing removal of environmental and other hazards and prevention of their recurrence.
GO TO our PRE PURCHASE BUILDING INSPECTION SERVICES: Authoritative information for home buyers and home owners is included with your inspection.
Building Inspection, Problem Diagnosis
, Forensic Investigation & Testing, Repair Consulting

CONTACT Daniel Friedman - Dan is a senior ASHI home inspector, nationally recognized expert on building inspection, building failures, and sick building investigation
Contact Daniel Friedman for website content suggestions or for fee-paid consulting

03/11/2010 - 04/27/2009 - InspectAPedia.com/Energy/Dew_Point_Tables.htm - © 2010 - 1988 Copyright Daniel Friedman All Rights Reserved - InspectAPedia® is a Registered U.S. Trademark