Building Structural Problems
Inspection, Diagnosis, & Repair of Structural Damage to Buildings

STRUCTURAL INSPECTIONS & DEFECTS - home. Guide to Detecting & Evaluating Structural Defects
Questions & Answers about building structural problem inspection, diagnosis, & repair
References

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These articles explain the inspection, detection, diagnosis, and repair of all types of structural defects on residential and light commercial buildings and will answer most homeowner concerns. We address brick and other masonry structures, wood frame structures, log homes, modular and factory built homes, even mobile homes. Chimneys, crawl spaces, decks, building flood damage, foundation crack and movement damage, rot or insect damage, sink holes, and water entry are examples of topics for which InspectAPedia provides inspection, diagnosis, and repair advice. Our page top photo illustrates Story Land[26] a remarkably askew wood-framed structure that would have been quite challenging to frame.

Guide to Detecting & Evaluating Structural Defects: Inspection, Diagnosis, & Repair of Settlement, Improper Construction, Rot & Insect Damage to Buildings

Schematic of major structural components of a house (C) Carson Dunlop

Articles found here address just about all types of residential & light commercial building structural construction, inspection, diagnosis & repair topics such as foundation damage, leaning, buckling, bowing, and cracking, FRT plywood failures, chimney inspections & safety concerns, causes and cures for rot, mold, & termites in buildings, sinkholes at building sites, stair and rail fall & trip hazards, & also special inspection methods for mobile homes. The sketch at left( courtesy Carson Dunlop) names the major structural components of a typical wood frame house set on a masonry foundation.

Structural Defect Recognition, Repair, Prevention for Building Structures, & Building Structural Failures

Most structural problems can be avoided by proper design and planning; but structural failures have been common for a long time, and sometimes are costly to handle properly.

This photo of the leaning tower of Pisa was sent to us by our friend Tom Smith who knows a crooked building when he sees one. Smith points out that the problems with the Tower have been known for generations and must have been apparent even during construction, as the upper level was constructed with an offset to try to re-balance the structure.

Modern reinforcement has permitted removal of cables that used to be tied to the tower of Pisa. As Bernie Campbalik says about old buildings, "Yep, we had guys like that back then too."

ARCHITECTURE & BUILDING COMPONENT ID - series of articles providing photo and drawing aids to architectural type and age of buildings and building components.
Balloon Framing: see Framing Methods
BASEMENT WATERPROOFING and FOUNDATION WATERPROOFING collect articles on keeping water and moisture out of buildings
BASKETBALL MOLD SYNDROME - BBMS- sudden attention to old clues in buildings makes them seem brand new to some observers
Best Practices Guide to Residential Construction - Steven Bliss Book Review by DJ Friedman
Chernobyl Nuclear Plant this interesting document describes serious flaws in the construction of the Chernobyl Nuclear Facility, conditions which were discussed among Russian authorities long before the Chernobyl nuclear disaster that occurred in the Ukraine in 1986

Chimneys, flues, wood stoves & fireplaces: chimney inspection, defects, safety concerns, Articles about Chimney Inspection, Collapse, Damage, Repair
- Bracing & Support for Chimneys - bracing needed at chimneys (just below)
- Bracket Chimney Collapse & Fire Risks - what is a "bracket chimney" and where are they found and why do they collapse
- Chimney Collapse Hazards - Main Article
- Chimney Movement Causes - what causes chimney separation, leaning, or curving, what can we see outside
- Chimney Movement - Indoor Evidence - what can we see indoors that tells us that chimney or fireplace movement are occurring?
- Chimney Movement - Outdoor Evidence is a guide to recognizing outdoor evidence of chimney movement
- Chimney Movement is Ongoing - Evidence is a guide to recognizing when chimney movement has been ongoing rather than a single or initial settlement or movement event.
- Chimney Crack Detection & Diagnosis - what causes cracking in brick chimneys, how dangerous is it?
- Cracked Concrete Block Chimneys - an example of cracking in a masonry block chimney exterior
- Curved Brick Chimneys - what causes curving in brick chimneys, how are they evaluated and repaired?
- Earthquake or Storms can Cause Chimney Collapse
- Foundation Support for Masonry Chimneys
- Leaning Chimney Repair Methods - how do we stabilize and repair a moving chimney, when does it need replacement, what are the alternatives?
- Loose Wobbly Chimneys need bracing or lateral support to avoid collapse
- Rooftop View Turns to Darkness a news report of a person who was trapped inside of a collapsing chimney is in our footnotes
- Split Openings in Brick Chimneys & Chimney Collapse Risk - we describe a case of an imminent catastrophic chimney collapse - Split Openings in Brick & Chimney Collapse

Deck & Porch Construction Guide - Deck & Porch construction details for safe, durable structures. Also see DECK COLLAPSE Case Study and DECK FLASHING LEAKS, ROT Case Study
ENERGY SAVINGS in BUILDINGS - articles on insulating, finding and fixing air and heat leaks, ventilation, etc. for energy efficient buildings
Flood Damage Control - FLOOD DAMAGE ASSESSMENT, SAFETY & CLEANUP
Action Guide after Flooding: First Priorities of Action in Response to Building Flooding
Cracks in Concrete Floors & Slabs, how to diagnose, evaluate, & repair slab cracks

Flooded Building Mold Prevention how to respond to avoid mold
FLOOD DAMAGE ASSESSMENT, SAFETY & CLEANUP - see list of detailed articles & advice found here
Flooded Septic Systems Septic Systems what to do after a septic system has been exposed to flooding
FLOOD VENTS & FLOOD PORTS to avoid structural damage during building flooding, flood venting, flood ports, or flood gates on buildings
FOUNDATION CRACKS & DAMAGE GUIDE - Foundation Inspection, Materials, Defect Diagnosis, Repair Guide, how to inspect and diagnose foundation problems, in-depth diagnosis, and evaluation of all types of structural and non-structural cracks in residential foundations [Brick, Concrete, Masonry Block, Stone]
Foundation Inspection Methods
Site Factors Affecting Foundations
Foundation Construction Materials how to identify different materials and types of foundation, how to recognize the effects of sequence of construction on building durability

FOUNDATION FAILURES by TYPE & MATERIAL - see detailed links at page top & left
FOUNDATION DEFECTS OF OMISSION how to recognize things that were left out, like footings, reinforcement, soil compaction, during foundation construction
FOUNDATION CRACK EVALUATION how to recognize and diagnose different types of foundation cracks, movement, damage, by the size, shape, location, pattern of cracks
SLAB CRACK EVALUATION how to recognize and diagnose different types of slab or concrete floor cracks and movement
FOUNDATION FAILURES by MOVEMENT TYPE how to recognize an diagnose different types of foundation damage by the kind of movement which has occurred
FOUNDATION BULGE or LEAN MEASUREMENTS a simple procedure for documenting the amount of lean or bulge in a foundation or other building wall
FOUNDATION MOVEMENT ACTIVE vs. STATIC how to determine if foundation movement was a one-time event or an ongoing problem
FOUNDATION DAMAGE SEVERITY some rules of thumb for deciding how much foundation movement requires further action
FOUNDATION DAMAGE REPORTS how to report foundation inspection results and damage
FOUNDATION REPAIR METHODS a catalog of methods used to repair damaged foundations and masonry building walls
Foundation Crack Repairs: How to Seal Cracks in Concrete a description of various products and methods used to seal or repair cracks in poured concrete walls, foundations, floors, & slabs.
Foundation Crack Repair Using Polyurethane Foam to stop basement or crawl space leakage
FOUNDATION INSPECTION STANDARDS a definition of scope of what a foundation inspector is required to observe and report

Framing & Wood Beams / Timbers Damage Inspection, Diagnosis, Testing, Repair

Photograph of severe roof structure damage from an unattended roof valley leak in a historic home.

FRAMING DAMAGE, INSPECTION, REPAIR - see detailed links for building framing, diagnosis, and repair at Related Topics . Our photo (left) illustrates site built truss construction in a tango hall in Buenos Aires, Argentina. See these articles related to the assessment of wood framing, timbers, & structural members
CONNECTORS, FASTENERS, TIES - where to buy, how to install, how to use structural connectors like joist hangers, rafter ties, framing connectors, anchors
- Cracks, Checking or Splitting Beams & Log Homes
- FIRE DAMAGE vs MOLD DAMAGE - how to distinguish between fire damage and black mold on building surfaces, how to test for mold, use of sealants and paints after a fire or after a mold cleanup
- ROT, FUNGUS, TERMITES
- ROT RESISTANT LUMBER
- ROT, TIMBER FRAME
- ROT, TIMBER ASSESSMENT
- STRUCTURAL WOOD ASSESSMENT
Fire Retardant Treated FRT Roofing Plywood Failures inspection, detection, testing of defective FRT plywood roof sheathing
INSECT INFESTATION / DAMAGE - wood destroying insect inspection, diagnosis, evaluation, repair, and prevention at buildings
Log Home Guide a guide to inspection, diagnosis, & repair of log homes, antique or old log cabins, modern kit log homes, vertical log construction, horizontal log construction, log checking, log home leaks, log home rot, log home sealants, gaskets, and coatings.
Mobile Home Inspections manufactured homes or "trailers" require special procedures
NOISE / SOUND DIAGNOSIS & CURE includes a discussion of the sources and cures of sounds in buildings
Post and beam framing: see Framing Methods

Rot, fungus, termites, carpenter ants, powder post beetles, & other wood destroying organisms
Sears Houses: How to identify Sears catalog kit houses photos and tips for identifying these interesting homes.
Sink Holes: Can X-Ray Vision [Advanced Building & Building Site Inspection Techniques] Warn of Sink Holes? in Florida or elsewhere

STAIRS, RAILINGS, LANDING INSPECTIONS, CODES - stair construction dimensions and specifications, stair codes
Stairs and Railings: A Checklist for Stair, Railing, Landing Safety Inspections

Timber Frame Construction, Barn Collapses, Timber Frame Rot: post and beam framing history, inspection, diagnosis, repair
SOLAR ENERGY SYSTEMS Solar house designs, problems, retrofits, optimization
TERMITE SHIELDS vs TERMITICIDE - how to avoid termite damage to buildings that use foam board insulation at the foundation or underneath stucco.
THERMAL EXPANSION of MATERIALS how temperature changes affect building materials and cause building leaks or other failures
Trailer vs Mobile Home vs Modular vs Panelized Construction an explanation of terms and how to identify these structures.
WATER ENTRY in BUILDINGS series of articles on the causes and cures of high indoor moisture, wet basements, wet crawl spaces, and moisture related problems like attic condensation and mold.
X-Ray Vision for Home Inspection: [Advanced Building & Building Site Inspection Techniques] - Developing your X-Ray Vision, Levels of Fear, and how to use them to find and report significant, hidden problems on Buildings or in the inspection of almost any complex system
X-Ray Vision for Home Inspection: a Power Point Presentation© of the X-Ray Vision Home Inspection class detailed-text shown above.

Rot, fungus, Termites, Carpenter Ants, Powder Post Beetles, & other Wood Destroying Organisms

Buckled siding at ground level indicates sill crushing (C) Daniel Friedman

Our photo (left) illustrates a combination of factors leading to a strong indication of serious structural damage at a home: aluminum siding at ground level (risk of insect attack) combined with buckled siding at the bottom course (a condition that only occurs long after original construction) point to crushed wooden sills under this structure, most often due to insect attack or rot or both.

INSECT INFESTATION / DAMAGE - complete guide to wood destroying insect inspection, diagnosis, evaluation, repair, and prevention at buildings
The Sick House/Sick Building Information Website Organized, un-biased, in-depth advice about mold, allergens, and other indoor contaminants: finding, testing, cleaning, clearance testing, and preventing mold, mildew, wood destroying (rot) molds (fungi). Explains how to assure that testing for toxic or allergenic molds is performed using valid field and lab methods. Advice and test procedures are provided for odors and odor source detection, toxic gas testing and gas source identification.
"House Eating Fungus" Meruliporia incrassata (also called "Poria" the house eating fungus) in the U.S. or Serpula lacrymans in Europe) can cause severe structural damage. Evidence of hidden "poria" may be found by expert inspection methods which include tracing sources and paths of probable Building leaks and moisture traps. Further, careful indoor particle sampling methods can often permit the presence of this mold to be identified in the laboratory.
Rot, fungus, termites, carpenter ants, powder post beetles, & other wood destroying organisms

Frequently Asked Questions (FAQs) about building structures: construction, inspection, diganosis, repair procedures

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Technical Reviewers & References

Related Topics, found near the top of this page suggest articles closely related to this one.

[1] InspectAPedia.com^® - Daniel Friedman - Publisher & Editor.
[2] Daniel Friedman - ASHI (1986-2006) - author of this website and article, building failures researcher.
[3] Carson, Dunlop & Associates Ltd., 120 Carlton Street Suite 407, Toronto ON M5A 4K2. (416) 964-9415 1-800-268-7070 info@carsondunlop.com. Thanks to Alan Carson and Bob Dunlop, for permission to use illustrations from their publication, The Illustrated Home which illustrates construction details and building components. Carson Dunlop provides home inspection education including the ASHI-adopted a Home Inspection Home Study Course, and publications such as the Home Reference Book, the Home Reference eBook, and report writing materials including the Horizon report writer, and home inspection services. Alan Carson is a past president of ASHI, the American Society of Home Inspectors.
[4] Brick Development Association, The Building Centre, 26 Store Street, London, WC1E 7BT, England, U.K., Tel: 020 7323 7030, Email: brick@brick.org.uk
[5] Brick Industry Association, 1850 Centennial Park Drive, Suite 301, Reston, VA 20191 Phone: 703.620.0010 Fax: 703.620.3928.
[6] Canada Masonry Centre, 360 Superior Blvd., Mississauga ON Canada L5T 2N7. Tel: (905) 564-6622. Offers the CMCA Textbook of Canadian Masonry.
[7] "Concrete Slab Finishes and the Use of the F-number System", Matthew Stuart, P.E., S.E., F.ASCE, online course at www.pdhonline.org/courses/s130/s130.htm
[8] Sal Alfano - Editor, Journal of Light Construction*
[9] Thanks to Alan Carson, Carson Dunlop, Associates, Toronto, for technical critique and some of the foundation inspection photographs cited in these articles
[11] Terry Carson - ASHI
[12] Mark Cramer - ASHI
[12] JD Grewell, ASHI
[14] Duncan Hannay - ASHI, P.E. *
[15] Bob Klewitz, M.S.C.E., P.E. - ASHI
[16] Ken Kruger, P.E., AIA - ASHI
[17] Aaron Kuertz aaronk@appliedtechnologies.com, with Applied Technologies regarding polyurethane foam sealant as other foundation crack repair product - 05/30/2007
[18] Bob Peterson, Magnum Piering - 800-771-7437 - FL*
[19] Arlene Puentes, ASHI, October Home Inspections - (845) 216-7833 - Kingston NY
[20] Greg Robi, Magnum Piering - 800-822-7437 - National*
[21] Dave Rathbun, P.E. - Geotech Engineering - 904-622-2424 FL*
[22] Ed Seaquist, P.E., SIE Assoc. - 301-269-1450 - National
[23] Dave Wickersheimer, P.E. R.A. - IL, professor, school of structures division, UIUC - University of Illinois at Urbana-Champaign School of Architecture. Professor Wickersheimer specializes in structural failure investigation and repair for wood and masonry construction. * Mr. Wickersheimer's engineering consulting service can be contacted at HDC Wickersheimer Engineering Services. (3/2010)
[24] *These reviewers have not returned comment 6/95
[25] Superior Walls of America, Ltd, 937 East Earl Road, New Holland, PA 17557, Phone: 1-800-452-9255, Fax: 717-351-9263. Website: http://www.superiorwalls.com/ Technical support:
Ed Helderman our Codes and Standards Manager. Email: ehelderman@superiorwalls.com or 717-351-9744
Robert Hare, Director of Technical Operations, rhare@superiorwalls.com, Tel: 717.351.9735
Thanks to Robert Hare for technical critique & content suggestions for this article - August 2010
[26] Superior Walls of America Builder Guideline Booklet MAN 42-9000 booklet, [local copy] web-search 09/01/2010 original source (indirect link): http://www.superiorwalls.com/faq.php?&answers=1&details=53
...
Story Land, Story Land is an amusement center located in New Hampshire at 850 NH Route 16 Glen, NH 03838 603-383-4186 Website: http://www.storylandnh.com/contact.html

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.

The Home Reference Book - the Encyclopedia of Homes, Carson Dunlop & Associates, Toronto, Ontario, 25th Ed., 2012, 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. Field inspection worksheets are included at the back of the volume. Special Offer: For a 10% discount on any number of copies of the Home Reference Book purchased as a single order. Enter INSPECTAHRB in the order payment page "Promo/Redemption" space. InspectAPedia.com editor Daniel Friedman is a contributing author.

Or choose the The Home Reference eBook for PCs, Macs, Kindle, iPad, iPhone, or Android Smart Phones. Special Offer: For a 5% discount on any number of copies of the Home Reference eBook purchased as a single order. Enter INSPECTAEHRB in the order payment page "Promo/Redemption" space.

Best Practices Guide to Residential Construction, by Steven Bliss. John Wiley & Sons, 2006. ISBN-10: 0471648361, ISBN-13: 978-0471648369, Hardcover: 320 pages, available from Amazon.com and also Wiley.com. See our book review of this publication.
Decks and Porches, the JLC Guide to, Best Practices for Outdoor Spaces, Steve Bliss (Editor), The Journal of Light Construction, Williston VT, 2010 ISBN 10: 1-928580-42-4, ISBN 13: 978-1-928580-42-3, available from Amazon.com
The Journal of Light Construction has generously given reprint permission to InspectAPedia.com for certain articles found at this website. All rights and contents to those materials are ©Journal of Light Construction and may not be reproduced in any form.
Allen, Edward and Joseph Iano. Fundamentals of Building Construction: Fourth Edition. Hoboken: John Wiley & Sons, 2004. pg. 91 [LVL lumber]
APA - The Engineered Wood Association, 7011 So. 19th St., PO Box 11700, Tacoma WA 98411-0700, Tel: 253-565-7265. APA provides an HDO/MDO Plywood Product Guide that offers details about these products., provides an HDO/MDO Plywood Product Guide that offers details about these products. Product support help desk: 253-620-7400. Email the APA at help@apawood.org. Web search 09/13/2010, original source: http://www.pacificwoodlaminates.com/img/PDFs/PlywoodGuide.pdf
Appliances and Home Electronics, - energy savings, U.S. Department of Energy
Avongard foundation crack progress chart for structural crack monitoring
Basement Moisture Control, U.S. Department of Energy
Building Failures, Diagnosis & Avoidance, 2d Ed., W.H. Ransom, E.& F. Spon, New York, 1987 ISBN 0-419-14270-3
Building Pathology, Deterioration, Diagnostics, and Intervention, Samuel Y. Harris, P.E., AIA, Esq., ISBN 0-471-33172-4, John Wiley & Sons, 2001 [General building science-DF] ISBN-10: 0471331724 ISBN-13: 978-0471331728
Building Pathology: Principles and Practice, David Watt, Wiley-Blackwell; 2 edition (March 7, 2008) ISBN-10: 1405161035 ISBN-13: 978-1405161039
The Circular Staircase, Mary Roberts Rinehart
Construction Drawings and Details, Rosemary Kilmer
Crawl Space Moisture Control, U.S. Department of Energy
Design of Wood Structures - ASD, Donald E. Breyer, Kenneth Fridley, Kelly Cobeen, David Pollock, McGraw Hill, 2003, ISBN-10: 0071379320, ISBN-13: 978-0071379328
This book is an update of a long-established text dating from at least 1988 (DJF); Quoting:
This book is gives a good grasp of seismic design for wood structures. Many of the examples especially near the end are good practice for the California PE Special Seismic Exam design questions. It gives a good grasp of how seismic forces move through a building and how to calculate those forces at various locations. THE CLASSIC TEXT ON WOOD DESIGN UPDATED TO INCLUDE THE LATEST CODES AND DATA. Reflects the most recent provisions of the 2003 International Building Code and 2001 National Design Specification for Wood Construction. Continuing the sterling standard set by earlier editions, this indispensable reference clearly explains the best wood design techniques for the safe handling of gravity and lateral loads. Carefully revised and updated to include the new 2003 International Building Code, ASCE 7-02 Minimum Design Loads for Buildings and Other Structures, the 2001 National Design Specification for Wood Construction, and the most recent Allowable Stress Design.
Diagnosing & Repairing House Structure Problems, Edgar O. Seaquist, McGraw Hill, 1980 ISBN 0-07-056013-7 (obsolete, incomplete, missing most diagnosis steps, but very good reading; out of print but used copies are available at Amazon.com, and reprints are available from some inspection tool suppliers). Ed Seaquist was among the first speakers invited to a series of educational conferences organized by D Friedman for ASHI, the American Society of Home Inspectors, where the topic of inspecting the in-service condition of building structures was first addressed.
Domestic Building Surveys, Andrew R. Williams, Kindle book, Amazon.com
Defects and Deterioration in Buildings: A Practical Guide to the Science and Technology of Material Failure, Barry Richardson, Spon Press; 2d Ed (2001), ISBN-10: 041925210X, ISBN-13: 978-0419252108. Quoting:
A professional reference designed to assist surveyors, engineers, architects and contractors in diagnosing existing problems and avoiding them in new buildings. Fully revised and updated, this edition, in new clearer format, covers developments in building defects, and problems such as sick building syndrome. Well liked for its mixture of theory and practice the new edition will complement Hinks and Cook's student textbook on defects at the practitioner level.
Georgia-Pacific Building Products, 133 Peachtree Street NE, Atlanta, GA 30303. Telephone: (404) 652-4000 , Wood Products: 800-284-5347. Gypsum Products: 800-255-6119. LVL lumber: GP-LAM, web search 09/14/2010, original source: http://www.gp.com/build/product.aspx?pid=1392
Guide to Domestic Building Surveys, Jack Bower, Butterworth Architecture, London, 1988, ISBN 0-408-50000 X
"Avoiding Foundation Failures," Robert Marshall, Journal of Light Construction, July, 1996 (Highly recommend this article-DF)
"A Foundation for Unstable Soils," Harris Hyman, P.E., Journal of Light Construction, May 1995
"Backfilling Basics," Buck Bartley, Journal of Light Construction, October 1994
"Inspecting Block Foundations," Donald V. Cohen, P.E., ASHI Reporter, December 1998. This article in turn cites the Fine Homebuilding article noted below.
"When Block Foundations go Bad," Fine Homebuilding, June/July 1998
Historic Preservation Technology: A Primer, Robert A. Young, Wiley (March 21, 2008) ISBN-10: 0471788368 ISBN-13: 978-0471788362
Laminated Veneer Lumber, Overview of the Product, Manufacturing, Market, Department of Forest Products Marketing, wood-Based Panels Technology, Finland [PDF] web search 09/14/2010, original source: http://www.hochstrate.de/micha/finnland/reports/replvl.html
Log Homes: Minimizing Air Leakage in Log Homes, U.S. Department of Energy
Manual for the Inspection of Residential Wood Decks and Balconies, by Cheryl Anderson, Frank Woeste (Forest Products Society), & Joseph Loferski, October 2003, ISBN-13: 978-1892529343, $39.00 at Amazon.com or at the InspectAPediaBookstore
Masonry structures: The Masonry House, Home Inspection of a Masonry Building & Systems, Stephen Showalter (director, actor), DVD, Quoting:
Movie Guide Experienced home inspectors and new home inspectors alike are sure to learn invaluable tips in this release designed to take viewers step-by-step through the home inspection process. In addition to being the former president of the National Association of Home Inspectors (NAHI), a longstanding member of the NAHI, the American Society of Home Inspectors (ASHI), and the Environmental Standard Organization (IESO), host Stephen Showalter has performed over 8000 building inspections - including environmental assessments. Now, the founder of a national home inspection school and inspection training curriculum shares his extensive experience in the inspection industry with everyday viewers looking to learn more about the process of evaluating homes. Topics covered in this release include: evaluation of masonry walls; detection of spalling from rebar failure; inspection of air conditioning systems; grounds and landscaping; electric systems and panel; plumbing supply and distribution; plumbing fixtures; electric furnaces; appliances; evaluation of electric water heaters; and safety techniques. Jason Buchanan --Jason Buchanan, All Movie Review
Masonry Design for Engineers and Architects, M. Hatzinikolas, Y. Korany, Canadian Masonry (2005), ISBN-10: 0978006100, ISBN-13: 978-0978006105
Masonry Structures: Behavior and Design, Robert G. Drysdale, Ahmid A. Hamid, Lawrie R. Baker, The Masonry Society; 2nd edition (1999), ISBN-10: 1929081014, ISBN-13: 978-1929081011
Masonry, Engineered: Using the Canadian Code, J. I. Gainville, Cantext publications (1983), ASIN: B0007C37PG
Masonry, Non-reinforced masonry design tables, Hans J. Schultz, National Concrete Producers Association and the Canadian Masonry Contractors Association (1976), ASIN: B0007C2LQM
Moisture Control in Buildings, U.S. Department of Energy
Moisture Control in Walls, U.S. Department of Energy
Quality Standards for the Professional Remodeling Industry, National Association of Home Builders Remodelers Council, NAHB Research Foundation, 1987.
Quality Standards for the Professional Remodeler, N.U. Ahmed, # Home Builder Pr (February 1991), ISBN-10: 0867183594, ISBN-13: 978-0867183597
R-Value of Wood, U.S. Department of Energy
Slab on Grade Foundation Moisture and Air Leakage, U.S. Department of Energy
Straw Bale Home Design, U.S. Department of Energy provides information on strawbale home construction - original source at http://www.energysavers.gov/your_home/designing_remodeling/index.cfm/mytopic=10350
Microllam Laminated Veneer Lumber (LVL) and/or Parallam Parallel Strand Lumber (PSL) MSDS Material Safety Data Sheet, courtesy of Weyerhaeuser Company, PO Box 9777, Federal Way, WA 98063-9777 Tel: 253-924-3865
More Straw Bale Building: A Complete Guide to Designing and Building with Straw (Mother Earth News Wiser Living Series), Chris Magwood, Peter Mack, New Society Publishers (February 1, 2005), ISBN-10: 0865715181 ISBN-13: 978-0865715189 - Quoting:
Straw bale houses are easy to build, affordable, super energy efficient, environmentally friendly, attractive, and can be designed to match the builder’s personal space needs, esthetics and budget. Despite mushrooming interest in the technique, however, most straw bale books focus on “selling” the dream of straw bale building, but don’t adequately address the most critical issues faced by bale house builders. Moreover, since many developments in this field are recent, few books are completely up to date with the latest techniques.
More Straw Bale Building is designed to fill this gap. A completely rewritten edition of the 20,000-copy best--selling original, it leads the potential builder through the entire process of building a bale structure, tackling all the practical issues: finding and choosing bales; developing sound building plans; roofing; electrical, plumbing, and heating systems; building code compliance; and special concerns for builders in northern climates.
Ohawa, Ontario Wood Reference Handbook, p. 166, Canadian Wood Council, 1991
"Vapor Barriers or Vapor Diffusion Retarders", U.S. DOE: how vapor barriers work, types of vapor diffusion barriers, installing vapor barrier
Ventilation for energy efficient buildings, Purpose, Strategies, etc.,

Sinkholes and Sudden Land Subsidence References, Products, Consultants

"A Hole in the Ground Erupts, to Estonia's Delight", New York Times, 9 December 2008 p. 10.
History of water usage in Estonia: (5.7 MB PDF) jaagupi.parnu.ee/freshwater/doc/the_history_of_water_usage_systems_in_estonia.pdf
"Quebec Family Dies as Home Vanishes Into Crater, in Reminder of Hidden Menace", Ian Austen, New York Times, 13 May 2010 p. A8. See http://www.nytimes.com/
"Quick Clay", Wikipedia search 5/13/2010 - http://en.wikipedia.org/wiki/Quick_clay
Florida DEP - Department of Environmental Protection, & Florida Geological survey (http://www.dep.state.fl.us/geology/default.htm) on Florida sinkholes: Effects of Sinkholes on Water Conditions Hernando County, Florida, Brett Buff, GIS in Water Resources, 2008, Dr. David R. Maidment, Photos - Tom Scott, Florida Geographic Survey - Web Search 06/09/2010 - http://www.dep.state.fl.us/geology/geologictopics/jacksonsink.htm
and - http://www.dep.state.fl.us/geology/geologictopics/sinkhole.htm
also see
Lane, Ed, 1986, Karst in Florida: Florida Geological Survey Special Publication 29, 100 p.
Foundation Engineering Problems and Hazards in Karst Terranes, James P. Reger, Maryland Geological Survey, web search 06/05/2010, original source: http://www.mgs.md.gov/esic/fs/fs11.html
Maryland Geological Survey, 2300 St. Paul Street, Baltimore, MD 21218
"Frost Heaving Forces in Leda Clay", Penner, E., Division of Building Research, National Research Council of Canada, Canadian Geotechnical Journal, NRC Research Press, 1970-2, Vol 7, No 1, PP 8-16, National Research Council of Canada, Accession number 1970-023601, Quoting from original source

The frost heaving forces developed under a 1 ft. (30.5 cm) diameter steel plate were measured in the field throughout one winter. The steel plate was fixed at the ground surface with a rock-anchored reaction frame. heave gauges and thermocouples were installed at various depths to determine the position and temperature of the active heaving zone. The general trend was for the surface force to increase as the winter progressed. when the frost line approached the maximum depth the force was in excess of 30,000 lb (13,608 KG). Estimates of the heaving pressure at the frost line ranged from 7 to 12 psi (0.49 to 0.84 KG/cm) square during this period. The variation of surface heaving force was closely associated with weather conditions. Warming trends resulting in a temperature increase of the frozen layer caused the forces to decline.

"Geoscape Ottowa-Gatineau Landslides", Canada Department of Natural Resources, original source http://geoscape.nrcan.gc.ca/ottawa/landslides_e.php - quoting from that source:

Leda clay slopes in the Ottawa valley are vulnerable to catastrophic landslides. More than 250 landslides, historical and ancient, large and small, have been identified within 60 km of Ottawa. Some of these landslides caused deaths, injuries, and property damage, and their impact extended far beyond the site of the original failure. In spectacular flowslides, the sediment underlying large areas of flat land adjacent to unstable slopes liquefies. The debris may flow up to several kilometres, damming rivers and causing flooding, siltation, and water-quality problems or damaging infrastructure. Geologists and geotechnical engineers can identify potential landslide areas, and appropriate land-use zoning and protective engineering works can reduce the risk to property and people.

Deposits of Leda clay, a potentially unstable material, underlie extensive areas of the Ottawa-Gatineau region. Leda clay is composed of clay- and silt-sized particles of bedrock that were finely ground by glaciers and washed into the Champlain Sea. As the particles settled through the salty water, they were attracted to one another and formed loose clusters that fell to the seafloor. The resulting sediment had a loose but strong framework that was capable of retaining a large amount of water. Following the retreat of the sea, the salts that originally contributed to the bonding of the particles were slowly removed (leached) by fresh water filtering through the ground. If sufficiently disturbed, the leached Leda clay, a weak but water-rich sediment, may liquefy and become a 'quick clay'. Trigger disturbances include river erosion, increases in pore-water pressure (especially during periods of high rainfall or rapid snowmelt), earthquakes, and human activities such as excavation and construction.

After an initial failure removes the stiffer, weathered crust, the sensitive clay liquefies and collapses, flowing away from the scar. Failures continue in a domino-like fashion, rapidly eating back into the flat land lying behind the failed slope. The flowing mud may raft intact pieces of the stiffer surface material for great distances.
Kochanov, W. E., 1999, Sinkholes in Pennsylvania: Pennsylvania
Geological Survey, 4th ser., Educational Series 11, 33 p., 3rd printing April 2005, Pennsylvania Department of Conservation and Natural Resources / Bureau of Topographic and Geologic Survey, DCNR Educational Series 11, Pennsylvania Geological Survey, Fourth Series, Harrisburg,
1999 - web search 06/05/2010, original source: http://www.dcnr.state.pa.us/topogeo/hazards/es11.pdf - Quoting from the document introduction:
The first 18 pages of this booklet contain an explanation of how sinkholes develop. In order to tell the sinkhole story, it is important to discuss a number of related geologic disciplines. The words used to describe sinkholes and these disciplines may be a bit unfamiliar. However, general explanations are given throughout the booklet to help clarify their meanings. Key words are printed in bold type for emphasis. The more important ones are defined in a Glossary that begins on page 29. The remaining sections, starting with “Sinkholes in the Urban Environment” (page 18), deal with sinkholes and their impact on our environment. This includes recognition of subsidence features and sinkhole repair.
[1] Sarah Cervone, [web page] data from the APIRS database, Graphics by Ann Murray, Sara Reinhart and Vic Ramey, Vic Ramey is the editor. DEP review by Jeff Schardt and Judy Ludlow. The web page is a collaboration of the Center for Aquatic and Invasive Plants, University of Florida, and the Bureau of Invasive Plant Management, Florida Department of Environmental Protection contact: varamey@nersp.nerdc.ufl.edu [A primary resource for this article
[2] Center for Cave and Karst Studies or the Kentucky Climate Center, both at Western Kentucky University
Vanity Fair - web search 06/04/2010 http://www.vanityfair.com/online/daily/2010/06/what-caused-the-guatemala-sinkhole-and-why-is-it-so-round.html
Sinkholes, Virginia Division of Mineral Resources,
Virginia Department of Mines, Minerals and Energy, www.dmme.virginia.gov Virginia Department of Mines, Minerals and Energy Division of Mineral Resources 900 Natural Resources Drive, Suite 500 Charlottesville, VA 22903 Sales Office: (434) 951-6341 FAX : (434) 951-6365 Geologic Information: (434) 951-6342 http://www.dmme.virginia.gov/ divisionmineralresources.shtml - Web search 06/09/2010

Sink Hole & Related Engineering References

Newton, J. G., 1987, Development of sinkholes resulting from man's activities in the eastern United States: US Geological Survey Circular 968, 54 p.
Sinclair, W. C., 1982, Sinkhole development resulting from ground-water withdrawal in the Tampa Area, Florida: U.S. Geological Survey Water-Resources Investigations 81-50, 19 p.
White, W. B., 1988, Geomorphology and Hydrology of Karst Terrains: Oxford University Press, New York, 464 p.
Williams, J. H. and Vineyard, J. D., 1976, Geologic indicators of subsidence and collapse in karst terrain in Missouri: Presentation at the 55th Annual Meeting, Transportation Research Board, Washington, D.C.
Barry F. Beck, A. J. (1999). Hydrogeology and Engineering Geology of Sinkholes and Karst. Rotterdam, Netherlands: A. A. Balkema.
Beck, B. F. (2003). Sinkholes and the Engineering and Environmental Impacts of Karst. Huntsville, Alabama: The American Society of Civil Engineers.
Beck, B. F. (2005). Sinkholes and the Engineering and Envrionmental Impacts of Karst. San Antonio, Texas: The American Society of Civil Engineers.
Tony Waltham, F. B. (2005). Sinkholes and Subsidence, Karst and Cavernous Rocks in Engineering and Construction. Chichester, United Kingdom: Praxis Publishing.
Whitman D., G. T. (1999). Spatial Interrelationships Between Lake Elevations, Water Tables, and Sinkhole Occurence in Central Florida: A GIS Approach. Photogrammetric Engineering and Remote Sensing , 1169-1178.
Cited References from this article:
#3. Detecting Sinkholes with Geophysics, Enviroscan, Inc., Lancaster PA 717-396-8922 email@enviroscan.com www.enviroscan.com 2003
Sinkholes in Guatemala, Guatemala City, Wikipedia - web search 06/04/2010 - http://en.wikipedia.org/wiki/Guatemala_City

Log Home Design, Inspection, Maintenance, Repair References & Product Sources

Log Homes: Minimizing Air Leakage in Log Homes, U.S. Department of Energy
Log Homes: Controlling Moisture in Log Homes, U.S. Department of Energy
Log Homes: Log Home Design, U.S. Department of Energy
Lincoln Log Homes Marketing, Inc., 6000 Lumber Lane, Kannapolis NC 28081 704-932-6151
Merrimac Log Homes, Henniker, NH, sells log home products, milled log home kits, log siding, and log home plans and log home construction accessories. 866-637-7462 or logs@mlhnh.com - merrimacloghomes.com
PermaChink Systems, Knoxville TN 800-548-1231 provides a range of log chinking products, coatings, and sealants for log and other wood buildings.


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