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Understand the home inspection process     How to spot a poor engineering report 

 

Tip #1: Understand the home inspection process: It is very important for you as a buyer or a seller to understand the different roles played by real estate inspectors and engineers in the inspection process.

From a practical perspective the difference between what a real estate inspector and an engineer comes down to what they report if the foundation performance is judged to be inadequate.

bullet The Real Estate Inspection Approach: Under the rules licensed real estate inspectors are required to follow, if they judge the performance of the foundation to be inadequate, the inspector is required to report the foundation as in need of repair.
bullet The Engineering Performance Evaluation Approach: An example of an engineering performance evaluation approach can be found in a publication of Texas Section of the American Society of Civil Engineers.  The guidelines state that if the foundation performance is judged to be inadequate, the engineer should report to his client the options that are available to improve the performance.  Those options do include structural foundation repair but also can include non-structural options such as landscaping changes, more or less aggressive watering of the foundation making cosmetic repairs and/or changes to the house and, if appropriate, doing nothing.  
bullet Why the Engineering Approach is a More Comprehensive  Approach: According to the US Army Corps of Engineers publication Foundations in Expansive Soils, the fact that a foundation is not performing "adequately" does not mean that foundation repair is either necessary or desirable.  Nor does it mean that foundation repair will actually improve the performance of the foundation.  An engineer has both the training and duty to exercise his engineering and analytical judgment in judging both the adequacy of the performance of the foundation and in reporting what options are applicable for improving inadequate foundation performance.  The real estate inspection approach is actually a checklist approach which frequently results in a repair  recommendation that is both unnecessary and counterproductive.  Many real estate inspectors know this.  They usually follow the rules by reporting a house that shows signs of damage due to foundation movement as in need of foundation repair but then also recommend a second opinion from a structural engineer.

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Tip #2: How to spot a poor engineering report: A competent engineering foundation evaluation will identify any damage observed by the engineer; if the damage is confined to cosmetic and minor door issues (like sticking doors) foundation repair should be presented as an option and not as a necessity.  Only if foundation movement has damaged the house so that it is unsafe to live in should foundation  repair be presented as a necessity or requirement.

To paraphrase the recommendations of the Texas Section of the ASCE, if the house is found to be unsafe due to foundation performance issues, the engineer is to inform the client and/or civil authorities immediately.

If the performance of the foundation judged to be inadequate, the engineer is to provide alternatives for the client’s consideration.  The alternatives should be commensurate with the nature and cause of the performance inadequacy and the seriousness of the consequences.  In making recommendations, the engineer is to take into consideration the cost effectiveness and practicality of the recommendations, the projected performance improvement that is likely to result, risks of diminished structural performance that may result from the recommended remediation, and the needs of the client.  Some clients may choose to perform periodic cosmetic repairs and door adjustments rather than undertake foundation underpinning.

There are two aspects of engineering reports you should look for:

bullet Foundation repair should normally be presented as an option, not as a necessity: If the foundation performance the engineer should, in our opinion, discuss foundation repair as an option among other options.  Foundation repair only becomes a necessity if there is severe structural damage to the house frame or to the foundation itself that makes the frame incapable of safely carrying normally imposed loads or if there are structural safety issues involved.  Even if one or both of these conditions exist, foundation repair would still not be a necessity unless there were no other way to practically deal with the problem.
bullet If the foundation performance is judged to be inadequate, any recommended option, including foundation repair, should include a recognition of both the benefits and risks of the option: Foundation repair usually does improve the performance of the foundation; but there are attendant risks.  Those risks include severe structural damage to the foundation and to the house structure.  A recommendation to underpin a foundation should reflect a considered judgment on the part of the engineer.

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© 2004 R. Michael Gray, P.E.  This material may be reprinted for personal and educational non-commercial use only.  This material is based on generally accepted engineering principles and practices; it is for general information only.  The information contained herein should not be used without first securing competent professional advice with respect to its suitability for a general or specific application.  Anyone using this information assumes all liability for such use.