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THIS OLD HOUSE CLASSIC INSPECTIONS

HOME INSPECTIONS & CONSTRUCTION MANAGEMENT, INC.

P.E. vs C.B.O.?

Professional Engineer vs Certified Building Official

Licensed Professional Engineers are licensed by the state, must meet education and experience requirements and pass rigorous exams administered by the state in a specific engineering discipline, such as civil, mechanical, or structural. Passing this exam permits the licensed Professional Engineer to offer services directly to the public. Licensed Professional Engineers are bound by a strict code of ethics, and will often put P.E. after their name, just as a medical doctor uses M.D.
 
Certified Building Officials are certified by the Council of American Building Officials, presently the International Code Council which is the national agency for the proponancy and publication of the International Building Codes, and must meet education and experience requirements and pass a rigorous exam administered by A.S.I. or the N.C.P.C.C.I. (National Certification Program for Construction Code Inspectors) in all aspects of building construction and the laws and management pertaining to building construction. Passing this exam permits the Certified Building Official to offer services directly to the public. Certified Building Officials are bound by a strict code of ethics, and will often put C.B.O. after their names just as a medical doctor uses M.D.
 
Do I need a Professional Engineer or a Certified Home Inspector to inspect my home?  You need a home inspector who is a Certified Building Official (C.B.O.) or a Certified Combination 1 & 2 Family Dwelling Inspector. When you hire a certified inspector, you are hiring an experienced professional who has training and experience in the building industry. It is the job of the home inspector to not only evaluate the condition of the house's major systems and structural integrity, but also evaluate how these systems are working together and identify areas that need to be watched, repaired, or replaced.
 
A Certified Home Inspector gives you the "Big Picture" analysis of the house you are purchasing. If the home inspector identifies the need for a more costly detailed analysis of any of the home's systems or structures, the inspector will recommend the appropriate professional, which may be an experienced Professional Engineer or an experienced Contractor or Authorized Service Representative with expertise in analyzing that particular system or structure.
 
Hiring a Professional Engineer to conduct a home inspection can be a less than satisfactory experience. The term "Professional Engineer" does not mean that the individual has training or experience in conducting home inspections. In most cases, a home inspection does not involve a detailed engineering analysis. Standard residential construction load calculations are easily understood and computed by most material suppliers, and can be explained by any reputable home inspector. Therefore, hiring a Professional Engineer to conduct a home inspection undoubtably will cost more, and it may not give you the results you desire and deserve.
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Comparison Reports

***Information for this comparison was written by a Professional Engineer comparing a
home inspector to a P.E.***
floorjoistspan.jpg

FLOOR JOISTS

A non-engineer’s description:  The floor joists are 2 X 6s spaced between 12 and 17 inches on center.

A Professional Engineer would evaluate these floor joists and conclude:  These floor joists do not provide sufficient floor loading capacity.  This house is structurally unsound.  Repair is estimated at $4,000.

Here's what Mike would tell you:  Floor joists for residential purposes are loaded at 40 PSF. Overloading of the floor joists will cause more deflection and spring in the floor than desired by industry standards, but in most cases will not result in structural failure. Additional bracing and/or supports can be added at a nominal cost by a reputable contractor.

firedamagedrafters.jpg

FIRE DAMAGED RAFTERS
A non-engineer's description:  The roof rafters, ridge beam, and sheathing are charred. As viewed from the outside, the roofline is sagging.
A Professional Engineer would evaluate the sagging roof line and the fire damage and conclude:  This roof line is sagging because the structure has been weakened due to fire damage. This house is structurally unsound. Rebuilding the roof will cost an estimated $13,000.
Here's what Mike would tell you:  There is evidence of a past house fire which should have been disclosed. The industry standard for acceptable char on structural members without significantly diminishing the structural integrity of the member is 1/4 inch. The structure may be repaired without removal of the charred members but will retain the identity of a fire damaged house, or the house may be repaired at a much greater cost by removing all charred and smoke damaged material, thus eliminating the identity of a fire damaged house.

steelcolumn.jpg

FLOOR SUPPORT COLUMNS

A non-engineer’s description:  There is a steel column under the main beam and supported on a concrete block.

A Professional Engineer  would evaluate the this column, footing, and beam, and conclude:  The concrete block under the steel column is an inappropriate footing, and the span between columns is too wide.  This house is structurally unsound.  Additional support is required at an estimated $3,000.

Here's what Mike would tell you:  The steel column is set on a concrete block. Removal of the concrete block and the installation of additonal support columns can be accomplished at a nominal cost.

electricalpanel.jpg

ELECTRICAL PANEL
A non-engineer’s description:  This house has 60 amp, 220 volt service. A Professional Engineeer would evaluate the electrical loads and this service, and conclude:  The 60 amp, 220 volt service is insufficient for the existing electrical needs in this house.  This house requires 200 amp, 220 volt service at an estimated $1,800.
Here's what Mike would tell you:  By National Electrical Code standards this house can have a 60 amp main disconnect with a maximum of 6 disconnects and a 10 KVA load. As long as the circuit breakers are sized properly with the circuit conductors, this system is adequate and safe. Any plans to add additional electrical circuits would result in the need to upgrade the electrical service equipment to a minimum of a 100 amp main distribution panel.
 

When buying your home, know what you're buying!